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Isuzu Motors Limited patents


Recent patent applications related to Isuzu Motors Limited. Isuzu Motors Limited is listed as an Agent/Assignee. Note: Isuzu Motors Limited may have other listings under different names/spellings. We're not affiliated with Isuzu Motors Limited, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "I" | Isuzu Motors Limited-related inventors


Nox sensor inspection program, vehicle inspection equipment, nox sensor inspection method, and recording medium

A process of causing an engine (10) to perform high-temperature exhaust driving (d1) after urea water from an urea water injection valve (33) is not supplied to an scr catalyst (34), and a process of causing the engine (10) to perform high-flow-rate exhaust driving (d2) after a flow rate of exhaust gas from a cylinder interior (13) is not reduced are performed on an ecu (40). A process of determining deterioration or malfunction of upstream and downstream nox sensors (47 and 48) based on detected values (ca and cb) acquired when the engine speed (na) reaches a determination speed (nx) is performed on a vehicle external computer (52).. ... Isuzu Motors Limited

Internal combustion engine and method for removing particulate substance from internal combustion engine

A spray device 40 sprays a liquid oxidation catalyst 41 into an interior of an upstream small-diameter pipe 32 which is disposed upstream of an oxidation catalyst 25, so that the liquid oxidation catalyst 41 is supplied to particulate matters which have accumulated on an upstream end face 31 of the oxidation catalyst 25 and a diametrically expanded pipe 33 which is disposed upstream of the upstream end face 31 to thereby oxidize and remove the accumulated particulate matters by a catalytic action of the supplied liquid oxidation catalyst 41, whereby it becomes possible to remove the particulate matters which have accumulated on the upper end face 31 of the oxidation catalyst 25 which is disposed in an exhaust passageway and a portion of the exhaust passageway which is situated upstream of the upstream end face 31.. . ... Isuzu Motors Limited

Cruise control device and cruise control method

A road information acquisition unit (12a) acquires information about the road in a prescribed segment forwards of a vehicle (1) that is traveling with the acceleration pedal actuated a first actuation amount, a vehicle information acquisition unit (12b) acquires information about the vehicle (1), a velocity prediction unit (12c) predicts, on the basis of the road information and the vehicle information, the changes in the vehicle velocity that would be brought about in the prescribed segment if the acceleration pedal actuation amount were a second actuation amount greater than the first actuation amount, and an acceleration control unit (12d) controls the acceleration pedal actuation amount such that the acceleration pedal actuation amount of the vehicle (1) becomes the second actuation amount if the predicted vehicle velocity minimal value is less than a target velocity.. . ... Isuzu Motors Limited

Travel control device and travel control method

Provided is a travel control device by which it is possible to improve the fuel economy of a vehicle and reduce the burden on a driver, without impacting ease-of-use for the driver. A travel control device (100) has the following: an automatic travel control unit (110) that causes a vehicle to travel according to a travel schedule including drive travel and coasting travel; a passing detection unit (120) that detects the start of a passing operation in which the vehicle passes another vehicle; and a coasting prohibition processing unit (130) that issues a prohibition on the start of coasting travel to the automatic travel control unit (110) under the condition that the passing operation has started.. ... Isuzu Motors Limited

Exhaust purification device and control method for same

The present invention is provided with: a sox purge control unit that executes catalyst regeneration processing that maintains the temperature of a nox occlusion/reduction catalyst at a prescribed recovery temperature; a catalyst temperature estimation unit that estimates catalyst temperature on the basis of the amount of unburnt fuel contained in exhaust and of a catalyst heat generation amount; a second exhaust temperature sensor that is arranged further to an exhaust downstream side than the catalyst and that detects exhaust temperature; and a heat generation amount correction value setting unit that, during the execution of the catalyst regeneration processing, on the basis of an estimated catalyst temperature estimated by the catalyst temperature estimation unit and of an actual exhaust temperature detected by the second exhaust temperature sensor, obtains a heat generation amount correction value that is used to correct the heat generation amount of the catalyst.. . ... Isuzu Motors Limited

Exhaust gas purification system

An exhaust purification system includes: an nox reduction type catalyst, which is provided in an exhaust passage; an intake air amount sensor, which detects an intake air amount of the internal combustion engine; and a controller, which executes a regeneration treatment that recovers an nox purification capacity of the nox reduction type catalyst by switching an exhaust air fuel ratio from a lean state to a rich state by using: an air-system control to reduce the intake air amount; and an injection-system control to increase a fuel injection amount, wherein, in response to a detection value of the intake air amount sensor, the controller changes at least one of a fuel injection timing and the fuel injection amount in the internal combustion engine, in at least one period of switching of: a period of starting the regeneration treatment; and a period of ending the regeneration treatment.. . ... Isuzu Motors Limited

Catalyst activation method and catalyst activation device

A catalyst activation method and a catalyst activation device are provided which can activate a nox catalyst efficiently in an ensured fashion. A plurality of accessories are connected to an internal combustion engine, and a control mechanism is provided on each of the accessories for controlling a load to be exerted on the internal combustion engine by driving the corresponding accessory. ... Isuzu Motors Limited

Nox occlusion amount estimating device and nox occlusion amount estimating method

An exhaust purification system includes a nox-occlusion-reduction-type catalyst that occludes nox in exhaust in a lean state and reduces and purifies the occluded nox in exhaust in a rich state, and a nox purge rich control unit that executes nox purge of reducing and purifying the occluded nox by putting the exhaust into the rich state by fuel injection control, where a catalyst temperature of the nox-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a nox occlusion amount of the nox-occlusion-reduction-type catalyst is equal to or higher than an nox occlusion amount threshold value, and executes the nox purge when the catalyst temperature is lower than a catalyst temperature threshold value.. . ... Isuzu Motors Limited

Cruise control device and cruise control method

This cruise control device enables more accurate prediction of running resistance and prevents worsening of fuel economy. In this device, a coasting prediction unit (12c) of an automatic cruise control device (12), which is for performing cruise control of the vehicle (1) on the basis of a resistance coefficient, predicts, on the basis of the resistance coefficient, the change in vehicle speed if the vehicle (1) were to coast; if the vehicle (1) does coast, a vehicle information acquisition unit (12b) acquires information about the detected vehicle speed; and a running resistance updating unit (12f) updates the value of the resistance coefficient on the basis of the information about the change in vehicle speed predicted by the coasting prediction unit (12c) and information about the vehicle speed acquired by the vehicle information acquisition unit (12b).. ... Isuzu Motors Limited

Internal combustion engine control device

An internal combustion engine control device including an oxidation catalyst heating value estimation unit 88a, a nox catalyst heating value estimation unit 88b, an oxidation catalyst temperature estimation unit 88c, a nox catalyst temperature estimation unit 88d, and switches 801, 802, 803 that switch between an enabled state in which processing performed by the oxidation catalyst heating value estimation unit 88a and the oxidation catalyst temperature estimation unit 88c is executed and a disabled state in which the processing performed by the oxidation catalyst heating value estimation unit 88a and the oxidation catalyst temperature estimation unit 88c is not executed, wherein the control device is configured to be applied to both an exhaust gas purification system including an nox-occlusion-reduction-type catalyst and an oxidation catalyst and an exhaust gas purification system including the nox-occlusion-reduction-type catalyst and not including the oxidation catalyst.. . ... Isuzu Motors Limited

Exhaust purification system

An exhaust purification system is provided with a nox-occlusion-reduction-type catalyst and a nox purge rich control unit that executes nox purge of reducing and purifying the occluded nox by putting the exhaust into a rich state by fuel injection control, in a case where a catalyst temperature of the nox-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a nox occlusion amount of the nox-occlusion-reduction-type catalyst is equal to or higher than an nox occlusion amount threshold value, and executes the nox purge even when the nox occlusion amount is less than the nox occlusion amount threshold value, in a case where the catalyst temperature is equal to or higher than a catalyst temperature threshold value which is greater than the catalyst temperature threshold value.. . ... Isuzu Motors Limited

Exhaust purification system, and control method for exhaust purification system

The embodiments include: a nox occlusion/reduction catalyst which is provided to an exhaust passage of an internal combustion engine, occludes nox in exhaust when the exhaust is in a lean state, and reduces and purifies occluded nox when the exhaust is in a rich state; a nox purging control unit which, when the exhaust is in the rich state, executes nox purging in which the nox occluded in the nox occlusion/reduction catalyst is reduced and purified; and a nox-purging-prohibition processing unit which, when at least one of a plurality of prohibition conditions is fulfilled, prohibits execution of catalyst regeneration processing by the nox purging control unit even if a catalyst-regeneration-processing start request has been issued, and, when one of the prohibition conditions is fulfilled during execution of the catalyst regeneration processing, invalidates the prohibition condition and allows continued execution of the catalyst regeneration processing by the nox purging control unit.. . ... Isuzu Motors Limited

Exhaust purification system and catalyst regeneration method

Provided is an exhaust purification system including: an nox occlusion reduction type catalyst (32), a catalyst temperature estimating unit (115), an nox occlusion amount estimating unit (113), a regeneration control unit (100) that performs catalyst regeneration of bringing an exhaust gas into a rich state to recover nox occlusion capacity of the nox occlusion reduction type catalyst (32), an interval setting unit (118) that sets a target interval from the termination of the catalyst regeneration to a start of next catalyst regeneration, a catalyst regeneration start processing unit (110) that starts the next catalyst regeneration when the nox occlusion amount is equal to or greater than a threshold and an elapsed time from the termination of the catalyst regeneration reaches the target interval, and an interval target value correcting unit (119) that extends and corrects the target interval based on the nox occlusion amount when the catalyst temperature is lower than a predetermined catalyst activation temperature.. . ... Isuzu Motors Limited

Exhaust purification system

An exhaust purification system including a nox catalyst 32 provided in an exhaust passage of an internal combustion engine 10 and purifying nox in exhaust; a maf sensor 40 for acquiring an air flow-rate of the internal-combustion engine 10; a control unit 60, 70 that execute catalyst regeneration treatment of recovering a nox purification ability of the nox catalyst 32 by performing, in combination, air-based control of reducing air flow-rate of the internal-combustion engine 10 to a predetermined target air flow-rate and injection-based control of increasing a fuel injection amount, wherein, in a case of executing the catalyst regeneration treatment, the control unit 60, 70 starts with the air-based control and starts the injection-based control when the air flow-rate acquired by the maf sensor 40 is reduced to the target air flow-rate.. . ... Isuzu Motors Limited

03/01/18 / #20180058574

Travel control device, and travel control method

In the present invention: a road information acquisition unit (12a) acquires road information about a prescribed section of road ahead of a vehicle traveling at a first shift position; a vehicle information acquisition unit (12b) acquires vehicle information; a speed prediction unit (12c) predicts, on the basis of the road information and the vehicle information, the speed transition in the prescribed section for when the vehicle will have traveled through the prescribed section at the first shift position; and a gearshift control unit (12d) causes a transmission (5) to downshift to a second shift position when the minimum value of the predicted vehicle speed is less than a prescribed speed.. . ... Isuzu Motors Limited

03/01/18 / #20180058290

Exhaust purification system and catalyst regeneration method

Provided is an exhaust purification system including: an nox occlusion reduction type catalyst that is provided in an exhaust system of an internal combustion engine, and occludes nox when an exhaust gas is in a lean state, and reduces the nox when the exhaust gas is in a rich state; a regeneration control unit that executes a regeneration process of bringing the exhaust gas into a rich state to reduce the nox occluded in the nox occlusion reduction type catalyst; a storing unit that stores an exhaust lambda prediction value in advance when the regeneration process is executed; a reduction amount estimating unit that estimates an nox reduction amount when the regeneration process is executed; and a prohibition unit that prohibits the execution of the regeneration process by the regeneration control unit when the estimated nox reduction amount is less than a predetermined lower limit threshold.. . ... Isuzu Motors Limited

02/22/18 / #20180051802

Cruise control device and cruise control method

A road information acquisition unit (12a) acquires information about the road in a prescribed segment in front, a vehicle information acquisition unit (12b) acquires information about the vehicle (1), a velocity prediction unit (12c) predicts, on the basis of the road information and the information about the vehicle (1), the changes in the vehicle velocity that would be brought about in the prescribed segment in the case of travelling the prescribed segment in a first gear, and a shift control unit (12d) which maintains the first gear if the condition is satisfied that the predicted vehicle velocity exhibits a minimum value other than at the ends of the prescribed segment and the minimum value is greater than the delay speed, which is set to a value less than a predetermined velocity set as the velocity that would result from downshifting.. . ... Isuzu Motors Limited

02/22/18 / #20180051615

Exhaust purification system and catalyst control method

An exhaust purification system includes; a catalyst provided in an exhaust passage of an engine to purify an exhaust gas; a catalyst temperature estimating unit that estimates a temperature of the catalyst based on an initial temperature of the catalyst at the time of starting of the engine and a caloric value of the catalyst which changes depending on an operating state of the internal combustion engine; and an initial catalyst temperature setting unit that sets an initial temperature of the catalyst based on a catalyst temperature stored immediately before stopping the engine, a temperature of an exhaust gas flowing into the catalyst which is stored immediately before stopping the engine, a temperature of an exhaust gas flowing into the catalyst which is acquired at the time of starting the engine, and a temperature of air taken into the engine which is acquired at the time of starting the engine.. . ... Isuzu Motors Limited

02/08/18 / #20180038817

Sensor

There is provided a sensor unit 30 arranged in an exhaust system of an internal combustion engine and including a filter member 31 having a plurality of cells divided by porous partition walls and collecting particulate matter in exhaust gas, and at least one pair of electrode members 32, 33 arranged to face each other with the cell interposed therebetween so as to form a capacitor, and a control unit 40 estimating an amount of the particulate matter in the exhaust gas and detecting water present in the exhaust system of the engine, based on an electrostatic capacitance between the pair of electrode members 32, 33.. . ... Isuzu Motors Limited

02/08/18 / #20180038304

Diagnostic device and diagnostic system

A diagnostic device for a sensor 100 provided in an exhaust passage 11 of an internal combustion engine 10 of a vehicle and detecting nitrogen compounds in exhaust gas, the diagnostic device including an offset diagnosis unit 42 which diagnoses, during deceleration of the vehicle in which the internal combustion engine 10 stops fuel injection, an offset amount of a sensor value of the sensor 100 from a zero point based on the sensor value of the sensor value, and a diagnosis prohibition unit 44 which prohibits the diagnosing of the offset amount when a flow rate of the exhaust gas of the internal combustion engine 10 rapidly increases while the offset amount is diagnosed by the offset diagnosis unit 42.. . ... Isuzu Motors Limited

02/08/18 / #20180038254

Exhaust purification system and control method therefor

An exhaust purification system includes an exhaust after-treatment apparatus which is provided on an exhaust passage of an internal combustion engine and which includes catalysts for purifying exhaust gas, a catalyst temperature retention control module for executing a catalyst temperature retention control in which an intake air flow is reduced to thereby suppress a reduction in the temperature of the catalysts when the internal combustion engine is in a motoring state where fuel injection into the internal combustion engine is stopped, and a prohibition module for prohibiting the execution of the catalyst temperature retention control in a case where an activation of an exhaust brake system is detected while the internal combustion engine is in the motoring state.. . ... Isuzu Motors Limited

02/08/18 / #20180038253

Maintenance tool and maintenance method for exhaust purification device

A maintenance pipe (30) used during maintenance of an exhaust purification device equipped with: a set of an oxidation catalyst (22) and a filter (23) for purifying exhaust gas from an engine (10); an upstream connecting pipe (16a) and a downstream connecting pipe (16b) which are mounted in a demountable way and guide the exhaust gas from the engine (10) to the oxidation catalyst (22); and an exhaust pipe injection device (24) and injectors (12) for increasing a concentration of unburned fuel contained in the exhaust gas. The maintenance pipe includes a flanged steel pipe (31) mounted to be replaceable with the downstream connecting pipe (16b), and a maintenance catalyst (32) that is housed in the flanged steel pipe (31), generates heat caused by oxidizing the unburned fuel contained in the exhaust gas from the engine (10), and heats the exhaust to discharge the exhaust to an exhaust downstream side.. ... Isuzu Motors Limited

02/08/18 / #20180038251

Exhaust purification device

There is provided a first pm sensor provided upstream of a filter and including a first sensor filter having a plurality of first cells collecting pm in the exhaust gas to be introduced into the filter, and a first pair of electrodes arranged to face each other with the first cell interposed therebetween, a second pm sensor provided downstream of the filter and including a second sensor filter having a plurality of second cells collecting pm in the exhaust gas discharged from the filter, and a second pair of electrodes arranged to face each other with the second cell interposed therebetween, and a filter state determination unit for acquiring an efficiency of collecting the pm in the filter, based on a first electrostatic capacitance between the first pair of electrodes and a second electrostatic capacitance between the second pair of electrodes.. . ... Isuzu Motors Limited

02/08/18 / #20180038250

Exhaust gas purification system for internal combustion engine, internal combustion engine, and exhaust gas purification method for internal combustion engine

A rich-wait-time threshold value is set based on the nox discharge amount per unit time discharged from an internal combustion engine. When the elapsed time, i.e. ... Isuzu Motors Limited

02/01/18 / #20180030911

Exhaust purification system and catalyst regeneration method

An exhaust purification system includes: an nox reduction type catalyst; an maf sensor; an sox purge control unit that uses an air system control having an intake air amount feedback-controlled based on a target intake air amount and an injection system control for a target injection increase amount set based on the target intake air amount, and a fuel injection amount feedback-controlled based on the target injection increase amount; an sox purge prohibition processing unit that prohibits an sox purge control; and a warming mode control unit that open-loop controls an air system when the sox purge control is prohibited, controls the fuel injection amount, and maintains the exhaust gas at a temperature. The sox purge control unit executes the injection system control by switching the target intake air amount into an actual intake air amount when starting the sox purge control after a warming mode control is ended.. ... Isuzu Motors Limited

02/01/18 / #20180028975

Exhaust gas purification system for internal combustion engine, internal combustion engine, and exhaust gas purification method for internal combustion engine

There is provided an exhaust gas purification system including a lean nox trap catalyst device which is provided on an exhaust passage of an internal combustion engine, wherein a control unit for controlling the exhaust gas purification system sets a desulfurization temperature tt which is a target temperature in executing a desulfurization control on the lean nox trap catalyst device so as to correspond to an sulfur accumulation amount sa in the lean nox trap catalyst device. Thereby, the desulfurization control with superior robustness is executed in which the desulfurization process is executed in an ensured fashion while suppressing the lean nox trap catalyst device from being thermally deteriorated or fused, whereby the exhaust gas purification system for an internal combustion engine, the internal combustion engine and the exhaust gas purification method for an internal combustion engine which can maintain the nox purification factor high are provided.. ... Isuzu Motors Limited

01/25/18 / #20180023435

Exhaust gas purification system for internal combustion engine, internal combustion engine, and exhaust gas purification method for internal combustion engine

An exhaust gas purification system for an internal combustion engine includes an oxidation catalyst device on an upstream side in an exhaust passage of an internal combustion engine and a lean nox trap catalyst device on a downstream side, a controller which controls the exhaust gas purification system is configured to, when a temperature-rising control of an exhaust gas in a regeneration control is performed to recover a purification ability of the exhaust gas purification system, perform a control that changes a measurement position of a control temperature which is a control amount of a feedback control in the temperature-rising control, according to an excess air ratio or an oxygen concentration of the exhaust gas passing through the exhaust passage.. . ... Isuzu Motors Limited

01/25/18 / #20180023430

Internal combustion engine and exhaust-gas-component estimating method

An internal combustion engine, which includes a collection device that is arranged in an exhaust pipe through which an exhaust gas emitted from a cylinder passes and collects pm contained in the exhaust gas and an nox sensor that is arranged on an upstream side of the collection device and detects an nox content in the exhaust gas, includes: an estimating device which estimates a pm content in the exhaust gas at the upstream side of the collection device from a detection value of the nox sensor, based on a trade-off relation between an nox emission amount and a pm emission amount from the cylinder.. . ... Isuzu Motors Limited

01/18/18 / #20180017000

Exhaust purification system and catalyst regeneration method

There is provided: a nox-occlusion-reduction-type catalyst 32 that is provided in an exhaust passage 13 of an internal combustion engine 10, a nox purge control unit 60 that performs a nox purge control of setting the exhaust in the rich state and reducing and purifying nox occluded in the nox-occlusion-reduction-type catalyst 32; and a nox purge inhibition processing unit 70 that inhibits nox purge control when the internal combustion engine 10 becomes a motoring state in which fuel injection is stopped, and inhibiting, when the internal combustion engine 10 has started fuel injection during the inhibition of the nox purge control, performance of the nox purge control from the start of the fuel injection until a predetermined period of time has elapsed.. . ... Isuzu Motors Limited

01/18/18 / #20180015412

Exhaust gas purification system, and nox purification capacity restoration method

There is provided an exhaust gas purification system including: a nox storage-reduction catalyst that is provided in an exhaust system of an internal combustion engine 10 to reduce and purify nox in exhaust gas; a deterioration degree estimation module for estimating a degree of deterioration of the nox storage-reduction catalyst; a nox storage amount estimation module for estimating a nox storage amount of the nox storage-reduction catalyst; a regeneration control unit for starting a regeneration process in which a nox storage capacity of the nox storage-reduction catalyst is restored when a nox storage amount that is estimated by the nox storage amount estimation module reaches a predetermined storage amount threshold; and a storage amount threshold correction module for correcting the storage amount threshold based on the degree of deterioration that is estimated by the deterioration degree estimation module.. . ... Isuzu Motors Limited

01/04/18 / #20180003609

Sensor

The sensor includes: a collection part 30l, 30m, 30s in which, a plurality of filter members for collecting particulate matter in exhaust gas are arranged in descending order of porosity from an exhaust upstream side to an exhaust downstream side of the exhaust gas; a pair of electrodes 32, 33 which is arranged to each of the plurality of filter members 30l, 30m, 30s and facing each other with the plurality of filter members interposed therebetween; and estimation means 42 to 44 far estimating a particulate matter amount collected on each of the plurality of filter members having different porosities based on a capacitance change amount between the pair of electrodes 32, 33.. . ... Isuzu Motors Limited

12/21/17 / #20170362980

Exhaust gas purification system, and nox purification capacity restoration method

There is provided an exhaust gas purification system including: a nox storage-reduction catalyst that is provided in an exhaust system of an internal combustion engine to reduce and purify nox in exhaust gas; a degree of deterioration estimation module 120 for estimating a degree of deterioration of the nox storage-reduction catalyst; a regeneration control unit 100 for executing a regeneration process in which exhaust gas is enriched so as to restore a nox storage capacity of the nox storage-reduction catalyst; an interval setting module for setting a target interval from an end of the regeneration process to a start of the subsequent regeneration process by the regeneration control unit; and an interval target value correction module for correcting the target interval based on the degree of deterioration that is estimated by the degree of deterioration estimation module.. . ... Isuzu Motors Limited

12/21/17 / #20170362979

Exhaust purification system and method for restoring nox purification capacity

An exhaust purification system includes: a nox reduction catalyst for reducing and purifying nox in an exhaust gas; a catalyst regeneration control module for executing a catalyst regeneration process of restoring a nox purification capacity of the nox reduction catalyst by switching an air-fuel ratio of the exhaust gas from a lean state to a rich state by using in parallel an air system control to reduce an intake air amount and an injection system control to increase a fuel injection amount; an exhaust gas temperature sensor that is provided on a downstream side of the nox reduction catalyst on an exhaust passageway; a catalyst temperature estimating module for estimating a catalyst temperature of the nox reduction catalyst; a temperature sensor value estimating module for estimating a sensor value of the exhaust gas temperature sensor; and an abnormality determination module for determining on an abnormality of a catalyst regeneration process.. . ... Isuzu Motors Limited

12/07/17 / #20170350299

Exhaust purification system and catalyst regeneration method

There is provided: a nox occlusion reduction-type catalyst that is provided in an exhaust passage of an internal combustion engine, occludes nox in exhaust when the exhaust is in a lean state, and reduces and purifies the occluded nox when the exhaust is in a rich state; an exhaust injector that is provided in the exhaust passage and is positioned further upstream than the nox occlusion reduction-type catalyst; a nox-purging control unit that performs nox purging of reducing and purifying the nox occluded in the nox occlusion reduction-type catalyst by lowering the exhaust to a prescribed target lambda by fuel injection by the exhaust injector; and a nox-purging-prohibition processing unit that inhibits performance of the nox purging in a case where the exhaust cannot be lowered to the target lambda even if the fuel injection is performed at a maximum limit injection amount of the exhaust injector.. . ... Isuzu Motors Limited

11/30/17 / #20170342881

Nox sensor purification program, internal combustion engine, and nox sensor purification method

A non-transitory computer-readable medium having a nox sensor purification instructions for a nox sensor causes: an on-vehicle electronic computer mounted in the vehicle, when it comes to a predetermined purification time, to execute a start procedure to send a start command to perform a purification control to the control unit; and control unit, in response to the start command, to execute a purification procedure to perform the purification control which causes the current flowing in the reference pump cell from the reference pump current to be a purification pump current, which is set to a current value larger than the reference pump current.. . ... Isuzu Motors Limited

11/16/17 / #20170328259

Diagnostic device and sensor

There is provided the diagnostic device for a sensor which is arranged in an exhaust passage of an internal combustion engine and detects a particulate matter amount in exhaust, the diagnostic device including a time-rate-of-change calculation unit which calculates a time rate of change of the particulate matter amount detected by the sensor during a period in which a fuel injection amount of the internal combustion engine is equal to or less than a predetermined injection amount threshold, and an abnormality determination unit which determines an abnormality of the sensor based on the time rate of change of the particulate matter amount calculated by the time-rate-of-change calculation unit.. . ... Isuzu Motors Limited

11/16/17 / #20170328258

Fault diagnosis device for exhaust pipe fuel injector

A fault diagnosis device for an exhaust pipe fuel injector that diagnoses a normality or an abnormality of the exhaust pipe fuel injector which injects a fuel according to an instructed fuel injection amount, includes: a storage unit which stores a regeneration duration and an instructed fuel injection amount in the regeneration duration; a calculation unit which calculates an instructed fuel injection amount per unit time in the regeneration duration; and a fault diagnosis unit which diagnoses that the exhaust pipe fuel injector is abnormal when the instructed fuel injection amount per unit time in the regeneration duration exceeds a fault threshold, and diagnoses that the exhaust pipe fuel injector is normal when the instructed fuel injection amount per unit time in the regeneration duration does not exceed the fault threshold.. . ... Isuzu Motors Limited

11/16/17 / #20170327113

Vehicle automatic travel control device and vehicle automatic travel method

An end point speed at an end point of inertial travel that a vehicle is controlled to perform in a short section li is calculated using a weight, a start point speed, slopes, and a horizontal distance, based on a change in energy of the vehicle or an acceleration of the vehicle in the short section. In a case where the calculated end point speed is within a speed range, the vehicle is controlled to perform inertial travel in the short section. ... Isuzu Motors Limited

11/09/17 / #20170321764

Dual clutch apparatus

A dual clutch device is provided with a first piston for engaging a first clutch by using hydraulic pressure supplied to a first hydraulic chamber and disengaging the first clutch by using a first spring, a second piston for engaging a second clutch by using hydraulic pressure supplied to a second hydraulic chamber and disengaging the second clutch by using a second spring, first supply lines for supplying hydraulic pressure to the first hydraulic chamber and a second hydraulic canceling chamber, second supply lines for supplying hydraulic pressure to the second hydraulic chamber and a first hydraulic canceling chamber, a first valve for allowing or blocking the hydraulic pressure supply to the first hydraulic chamber and the second hydraulic canceling chamber, and a second valve for allowing or blocking the hydraulic pressure supply to the second hydraulic chamber and the first hydraulic canceling chamber.. . ... Isuzu Motors Limited

10/26/17 / #20170307068

Control device and control method for dual clutch-type transmission

A dual clutch-type transmission control device is provided which improves the accuracy with which transmission torque is learned. A dual-clutch transmission includes a clutch apparatus having a first clutch and a second clutch, a first input shaft, a second input shaft, a counter shaft, an output shaft, an auxiliary transmission portion including a first input gear pair and a second input gear pair, a main transmission portion including an output gear pair, and learning modules and the learning modules shift the main transmission portion into a neutral state, disengage both the first and second clutched generate a torque change in an engine by keeping the engine running at a predetermined revolution number, engaging partially one of the first and second clutches and thereafter engaging the other clutch gradually partially and learn an amount of change of torque associated with the torque change as transmission torque of the other clutch.. ... Isuzu Motors Limited

09/21/17 / #20170268450

Regeneration device for exhaust-gas purifying device

There is provided a regeneration device for an exhaust-gas purifying device 40 which is provided in an exhaust system of an internal combustion engine, the regeneration device including: an injector for injecting fuel into a cylinder; a glow plug which is energized to be heated to thereby increase a temperature inside the cylinder; and a regeneration control unit for executing a regenerating operation for restoring a purification capacity of the exhaust-gas purifying device by controlling the injection of fuel of the injector and the energization of the glow plug , wherein during the regenerating operation, the regeneration control unit controls the injection of fuel of the injector by a multi-stage injection including at least a post injection and energizes the glow plug at a predetermined duty ratio to burn, within the cylinder, fuel supplied by the post injection.. . ... Isuzu Motors Limited

09/14/17 / #20170261081

Dual clutch transmission

A dual clutch transmission 1 includes a first clutch 2, a second clutch 3, a first input shaft 4, a second input shaft 5, a counter shaft 6, an output shaft 7, a first splitter gear changing portion 10, a second splitter gear changing portion 20, and an output portion 30. The first splitter gear changing portion 10 has a first input gear 11a, a first counter gear 11b, a second input gear 12a, a second/counter gear 12b, and a first coupling mechanism 13. ... Isuzu Motors Limited

08/31/17 / #20170248057

System and method for managing temperature of urea solution

A system and method for managing the temperature of a urea solution are thereby provided, in which air bubble formation in the urea solution caused by increases in the urea solution temperature is suppressed while thawing of the urea solution stored in the urea solution tank and used for nox purification treatment is ensured, the concentration of the urea contained in the urea solution is accurately determined, and nox is precisely reduced.. . ... Isuzu Motors Limited

08/24/17 / #20170241365

Device for stopping diesel engine

A device for a common rail diesel engine can control an engine phase when the engine is stopped so the engine can be restarted quickly. An engine phase determining means determines an engine phase based on a crank angle and an angle of a camshaft, an engine stop position determining means stores a stopping time spent from the issuance of an engine stop request to the stop of the engine and obtains an engine phase when the engine is stopped based on the engine phase, resulting when the engine stop is requested, and the stopping time, and an at-time-of-stopping injector control means controls fuel injected from the fuel injectors so the engine phase obtained by the engine stop position determining means when the engine is stopped after making the engine stop request allows a piston in a specific cylinder to stop at a bottom dead center of a compression stroke.. ... Isuzu Motors Limited

08/10/17 / #20170227423

Sensor

The sensor includes a filter member including cells that trap pm in exhaust gas; electrode members arranged to face each other with the cell interposed and forming a capacitor, an electric heater that executes, when an amount of pm has accumulated in the cells, filter regeneration of heating the cells to combust and remove the pm, a storage unit that stores a reference reduction amount, which is an electrostatic capacitance reduction amount between the electrode members in a case where the filter regeneration is executed in a state where the pm is not flowing into the filter member, and estimation units that estimate a pm amount based on (a) an actual electrostatic capacitance change amount between the electrode members during a regeneration interval period, and (b) a difference between an actual electrostatic capacitance reduction amount between the electrode members and the reference reduction amount during a filter regeneration period.. . ... Isuzu Motors Limited

08/10/17 / #20170227073

Clutch connection/disconnection device for dual clutch transmission

A clutch-side transmission circuit transmits, from a clutch pedal, a restoring action of the depressed clutch pedal. A switching device connects a first clutch-side hydraulic circuit to the pedal-side hydraulic circuit when a shift lever sl is tilted forwards and connects a second clutch-side hydraulic circuit to the pedal-side hydraulic circuit when the shift lever sl is tilted rearwards. ... Isuzu Motors Limited

08/10/17 / #20170226949

Sensor

The sensor includes a filter member including cells that trap pm in exhaust gas, electrode members arranged to face each other with the cell interposed and forming a capacitor, an electric heater that executes, when an amount of pm has accumulated in the cells, filter regeneration for combusting and removing the pm, a temperature sensor that acquires the temperature of the filter member, a storage unit that stores therein a reference temperature, which is the temperature of the filter member where the filter regeneration has been executed in a state in which pm is not flowing into the filter member, and estimation units that estimate a pm amount included in the exhaust gas based on (a) an electrostatic capacitance change amount between the electrode members during a regeneration interval and (b) a difference between the temperature acquired by the temperature sensor and the reference temperature during a filter regeneration interval.. . ... Isuzu Motors Limited

08/03/17 / #20170218807

Exhaust-gas-cleaning system and method for controlling the same

An exhaust purification system includes: an nox reduction type catalyst, which is provided in an exhaust system; and a regeneration treatment unit, which recovers an nox purification capacity of the nox reduction type catalyst, wherein the regeneration treatment unit includes: a target setting unit, which sets a target injection amount of at least one of a post injection and an exhaust pipe injection that is required for setting an excess-air-ratio of the exhaust gas to the target excess-air-ratio, based on a suction air amount of the internal combustion engine, the target excess-air-ratio, and a fuel injection amount of the internal combustion engine; and an injection controller, which controls an injection amount of at least one of the post injection and the exhaust pipe injection, based on the target injection amount input from the target setting unit.. . ... Isuzu Motors Limited

07/13/17 / #20170198787

Isuzu motors limited

A dual clutch transmission 1 is provided with a first clutch 2, a second clutch 3, a first input shaft 4, a second input shaft 5, a counter shaft 6, an output shaft 7, a first splitter gear-shifting unit 10, a second gear-shifting transmission unit 20, and an output unit 30. The first splitter gear-shifting unit 10 has a first input gear 11a, a first counter gear 11b, a second counter gear 12a, an input/output gear 12b, a first linking mechanism 13, a second linking mechanism 14, and a third linking mechanism 15. ... Isuzu Motors Limited

07/06/17 / #20170191397

Exhaust-gas-cleaning system and method of controlling same

An exhaust purification system includes: an nox reduction type catalyst, which is provided in an exhaust system of an internal combustion engine and reduces and purifies nox in an exhaust gas; and a regeneration treatment unit, which recovers an nox purification capacity of the nox reduction type catalyst by lowering an excess-air-ratio of the exhaust gas to a predetermined target excess-air-ratio, wherein the regeneration treatment unit includes: a target setting unit, which sets a target intake air amount that is required for setting the exhaust gas to the target excess-air-ratio, based on a fuel injection amount of the internal combustion engine; and an air-system controller, which controls at least one of an intake air amount and an exhaust recirculating amount of the internal combustion engine, in response to the target intake air amount input from the target setting unit.. . ... Isuzu Motors Limited

07/06/17 / #20170191396

Exhaust gas purification system

An exhaust purification system includes: an nox reduction type catalyst, which is provided in an exhaust system; a temperature acquisition unit, which acquires a catalyst temperature of the nox reduction type catalyst; and a regeneration treatment unit, which executes a catalyst regeneration to recover an nox purification capacity, wherein the regeneration treatment unit alternately executes a rich control, in which an exhaust air fuel ratio is set to a rich state to raise a temperature of the nox reduction type catalyst to a predetermined target temperature, and a lean control, in which the exhaust air fuel ratio is set to a lean state to lower the temperature of the nox reduction type catalyst, and sets an execution period of the lean control based on a deviation between the catalyst temperature acquired by the temperature acquisition unit during the previous rich control and the target temperature.. . ... Isuzu Motors Limited

07/06/17 / #20170191394

Exhaust purification system

An exhaust purification system that includes a selective catalytic reduction to purify nox contained in an exhaust gas by using ammonia produced from urea water and an nox sensor to acquire a value of the nox contained in the exhaust gas, and the exhaust purification system includes: a reach time measurement unit that measures a reach time of the nox value acquired by the nox sensor, the reach time being a required time for the nox value to reach, from a first predetermined determinative nox value, a second predetermined determinative nox value, which is higher than the first determinative nox value; and a determination unit that determines that malfunction occurs in the nox sensor when the reach time measured by the reach time measurement unit is equal to or shorter than a first predetermined determinative time.. . ... Isuzu Motors Limited

06/29/17 / #20170184160

Dual clutch device

A dual clutch device includes a first piston applying a first clutch by a hydraulic pressure supplied into a first hydraulic pressure chamber and releasing the first clutch by a first spring, a second piston applying a second clutch by a hydraulic pressure supplied into a second hydraulic pressure chamber and releasing the second clutch by a second spring, a first supply line supplying a hydraulic pressure into the first hydraulic pressure chamber and a second hydraulic pressure canceling chamber, a second supply line supplying a hydraulic pressure into the second hydraulic pressure chamber and a first hydraulic pressure canceling chamber, a first valve allowing or cutting the supply of hydraulic pressure into the first hydraulic pressure chamber and the second hydraulic pressure canceling chamber, and a second valve allowing or cutting the supply of hydraulic pressure into the second hydraulic pressure chamber and the first hydraulic pressure canceling chamber.. . ... Isuzu Motors Limited

06/15/17 / #20170167343

Nox reduction control method for exhaust gas aftertreatment device

This nox reduction control method is for an exhaust gas aftertreatment device having an oxidation catalyst and an lnt catalyst which are disposed in an exhaust pipe and repeating an adsorption or occlusion of nox which is executed when an air-fuel ratio is in a lean state and a reduction of nox which is executed when the air-fuel ratio is in a rich state, the method including executing a post-injection or an exhaust pipe injection and causing hc to be adsorbed in the oxidation catalyst when an exhaust gas temperature is low, and causing the hc which is adsorbed in the oxidation catalyst to be desorbed and reducing an adsorbed nox in the lnt catalyst by raising the exhaust gas temperature during the rich state.. . ... Isuzu Motors Limited

06/08/17 / #20170159536

Sensor

The pm sensor includes: a filter member having a plurality of measuring cells which are defined by a porous partition wall and configured to trap particulate matters in exhaust gas; at least a pair of electrode members which are disposed to face each other with the measuring cell sandwiched therebetween to form a condenser; a heater member which heats the measuring cell to burn and remove particulate matters accumulated in the measuring cell; and an estimation unit which estimates an amount of the particulate matters contained in the exhaust gas based on an electrostatic capacity between the pair of electrode members. . ... Isuzu Motors Limited

06/01/17 / #20170152779

Exhaust gas cleaning system for internal combustion engine and exhaust gas cleaning method for internal combustion engine

An exhaust gas cleaning system for an internal combustion engine is provided with, in an exhaust passage of an internal combustion engine and in order from an upstream side: a hydrocarbon supply unit; an upstream side catalyst unit of an oxidation catalyst, a nox reduction catalyst, or the like; and a catalyst-equipped fine particle collection filter having a hydrocarbon adsorption function, wherein when a vehicle on which the engine is mounted accelerates after driving for a preset set time period at a temperature of exhaust gas equal to or less than a preset set exhaust gas temperature, the supply of hydrocarbon into the exhaust gas is started when an exhaust gas temperature becomes equal to or more than a preset first set temperature, and the supply of hydrocarbon is terminated when a preset termination condition is satisfied.. . ... Isuzu Motors Limited

03/16/17 / #20170074144

Exhaust purification apparatus for internal combustion engine

There is provided an exhaust purification apparatus for an internal combustion engine in which a catalyst capable of adsorbing and oxidizing hydrocarbon is provided in an exhaust pipe, the exhaust purification apparatus including temperature detection means for detecting a temperature of the catalyst, estimation means for accumulating a time during which the temperature of the catalyst detected by the temperature detection means is equal to or less than a predetermined temperature, and estimating an amount of hydrocarbon adsorbed on the catalyst from the accumulated time, and control means for controlling fuel ejection of the internal combustion engine in a first ejection mode in which the temperature of the catalyst is increased to a temperature where hydrocarbons adsorbed on the catalyst are oxidized, in a case in which the amount of hydrocarbons estimated by the estimation means exceeds a predetermined upper limit.. . ... Isuzu Motors Limited

02/16/17 / #20170044950

Exhaust purifying system

An exhaust purification system can prevent a nh3 slip caused by an excessive injection of urea water, and includes: an scr that purifies nox contained in an exhaust gas using ammonia, as a reducing agent, produced from urea water; a urea water injection device that injects the urea water into an exhaust passage upstream from the scr; an estimated-adsorption-amount calculation unit that calculates an estimated adsorption amount of the ammonia adsorbed in the scr; an injection control unit that executes an injection control of the urea water injection device based on the estimated adsorption amount; and an estimated-adsorption-amount change unit that changes the estimated adsorption amount used for the injection control into a value increased or decreased by a predetermined amount when a predetermined condition is established that can cause a difference between an actual adsorption amount of the ammonia adsorbed in the scr and the estimated adsorption amount.. . ... Isuzu Motors Limited

02/16/17 / #20170043295

Exhaust gas purification system

The exhaust gas purification system includes a scr, an nox sensor which is provided on a downstream side of the scr, and an nox purifying controller which controls an amount of urea water being ejected to the scr and performs an abnormality diagnosis based on a detection value of the nox sensor, wherein the exhaust gas purification system includes an exhaust gas temperature sensor which acquires temperature of the exhaust gas flowing into the scr, a temperature increasing rate calculating unit which calculates a temperature increasing rate at which the exhaust gas temperature acquired by the exhaust gas temperature sensor reaches a second temperature from a predetermined first temperature, and a prohibiting unit which prohibits abnormality diagnosis by the nox purifying controller in a case in which the temperature increasing rate calculated by the temperature increasing rate calculating unit is higher than a predetermined determination threshold value.. . ... Isuzu Motors Limited








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