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Tula Technology Inc patents


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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "T" | Tula Technology Inc-related inventors


Engine control in fuel and/or cylinder cut off modes based on intake manifold pressure

Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (dcco) state and an operational state are described. In one aspect, transitions from dcco may begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. ... Tula Technology Inc

Autonomous driving with dynamic skip fire

The present invention relates generally to techniques for improving fuel efficiency of a vehicle powered by an internal combustion engine capable of operating at various displacement levels. An autonomous driving unit or cruise controller selects when possible an engine torque output that corresponds to a fuel efficient displacement level. ... Tula Technology Inc

Coordination of vehicle actuators during firing fraction transitions

A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, tcc slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. ... Tula Technology Inc

Engine error detection system

A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. ... Tula Technology Inc

Firing fraction transition control

A variety of methods and arrangements are described for controlling transitions between effective firing fractions during dynamic firing level modulation operation of an engine in order to help reduce undesirable nvh consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the effective firing fractions during transitions such that the resulting changes in the effective firing fraction better track cylinder air charge changing dynamics associated with the transition.. ... Tula Technology Inc

Air charge estimation for use in engine control

Methods, devices, estimators, controllers and algorithms are described for estimating working chamber air charge during engine operations. The described approaches and devices are well suited for use in dynamic firing level modulation controlled engines. ... Tula Technology Inc

Dynamically varying an amount of slippage of a torque converter clutch provided between an engine and a transmission of a vehicle

A system and method for dynamically varying an amount slippage of a torque converter clutch (tcc) provided between an engine and a transmission of a vehicle in response to non-powertrain factors. By varying a slippage output signal, the amount of tcc slippage between the engine and the transmission can be adjusted. ... Tula Technology Inc

Coordination of vehicle actuators during firing fraction transitions

A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire and potentially variable displacement operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, tcc slip, etc.) is changed to, or close to a target position before i corresponding firing fraction change is implemented. ... Tula Technology Inc

Engine torque smoothing

Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable nvh. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. ... Tula Technology Inc

Engine torque smoothing

Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable nvh. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. ... Tula Technology Inc

Engine torque smoothing

Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable nvh. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. ... Tula Technology Inc

Decel fuel cut-off

Various methods and arrangements for improving fuel economy in decel fuel cut-off (dfco) operation of an internal combustion engine are described. In one aspect, a catalytic converter bypass valve diverts the pumped air in dfco mode from flowing through a catalytic converter. ... Tula Technology Inc

Skip fire transition control

Methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help smooth the transitions. Generally, firing fractions transitions are implemented gradually, preferably in a manner that relatively closely tracks manifold filling dynamics. ... Tula Technology Inc

Skip fire transition control

A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help reduce undesirable nvh consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.. ... Tula Technology Inc

08/17/17 / #20170234253

Deceleration cylinder cut-off in a hybrid vehicle

Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (dcco) state and an operational state are described. In one aspect, transitions from dcco begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. ... Tula Technology Inc

08/03/17 / #20170218867

Multi-level skip fire

In one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. ... Tula Technology Inc

08/03/17 / #20170218866

Internal combustion engine air charge control

Internal combustion engine having cam actuated valves that can be controlled to facilitate the use of different air charge levels in different cylinders or sets of cylinders are described. In one aspect a first set of cylinders is operated in a skip fire manner in which the corresponding cylinders are deactivated during skipped working cycles. ... Tula Technology Inc

05/11/17 / #20170130630

Lean burn internal combustion engine exhaust gas temperature control

A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. ... Tula Technology Inc

05/04/17 / #20170122237

Internal combustion engine control for improved fuel efficiency

A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. ... Tula Technology Inc

04/13/17 / #20170101956

Valve fault detection

Methods and systems are described for detecting valve actuation faults in internal combustion engines operating in a skip fire operational mode. In one aspect, for each skip fire working cycle, an expected exhaust pressure is determined for a time period corresponding to a potential exhaust event. ... Tula Technology Inc

03/09/17 / #20170067401

Firing fraction management in skip fire engine control

In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. ... Tula Technology Inc

02/23/17 / #20170051689

Noise, vibration and harshness reduction in a skip fire engine control system

A variety of methods and arrangements for reducing noise, vibration and harshness (nvh) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner a smoothing torque is determined that is applied to a powertrain by an energy storage/release device. ... Tula Technology Inc

02/02/17 / #20170030278

Reducing firing decision latency in skip fire engine operation

Techniques and controllers are described for dynamically determining when to request firing decisions for individual firing opportunities while operating an internal combustion engine in a skip fire mode. In one aspect, a skip fire controller is arranged to periodically determine the timing by which a next cylinder firing decision request must be made in order to assure that a corresponding firing decision can be implemented as desired, and whether there is sufficient time to wait until at least the next periodic timing determination is made to request the next cylinder firing decision. ... Tula Technology Inc

01/12/17 / #20170009729

Multi-level skip fire

In one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. ... Tula Technology Inc








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