Patent application number | Description | Published |
20090018756 | METHOD FOR COMPENSATING AN OPERATING IMBALANCE BETWEEN DIFFERENT BANKS OF A TURBOCHARGED ENGINE - A method for controlling differences in cylinder mixtures for a two cylinder bank engine having a turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder mixture variation. | 01-15-2009 |
20090192684 | VEHICLE TRAJECTORY CONTROL SYSTEM - A method for controlling an engine coupled to a transmission is described. The method is suited for a transmission having at least one gear in which an over-running clutch is present. The invention describes a method for adjusting an engine operating parameter to maintain transmission input speed at or below a synchronous transmission input speed when the transmission is in the gear with the over-running clutch. The synchronous transmission input speed is based on transmission state and transmission output speed. Alternatively, vehicle speed can be used in place of transmission output speed. | 07-30-2009 |
20090251302 | Vehicle Misfueling Mitigation System and Method - A method is provided to indicate improper fuel filling in a vehicle. An indicator is actuated if a proportion of alcohol in the fuel is outside a range of expected proportions. In some examples, the range corresponds to a non-flex fuel vehicle recommended range, or to a normal range for a low alcohol-content fuel, which may be between 0 and 15 percent alcohol by volume. The indicator may include a diagnostic code or a dash light. Further, the indicator may be actuated in combination with a mitigating action, which may involve adjustment of a fuel injector pulse width or an ignition spark timing, as examples. | 10-08-2009 |
20100012099 | SYSTEM AND METHOD FOR IMPROVING FUEL VAPOR PURGING FOR AN ENGINE HAVING A COMPRESSOR - A system and method for storing and purging fuel vapors for an internal combustion engine comprising a compressor is presented. The system allows the canister to be purged even while the engine is operated at high engine load. | 01-21-2010 |
20100017096 | VEHICLE STABILITY AND SURGE CONTROL - In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example. | 01-21-2010 |
20100017101 | VEHICLE SURGE AND SPARK TIMING CONTROL - A method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting spark timing in the combustion chamber of the engine in response to a knock indication, and further adjusting spark timing in response to the vehicle acceleration to reduce surge. | 01-21-2010 |
20100024770 | FUEL DELIVERY SYSTEM FOR A MULTI-FUEL ENGINE - A fuel delivery system for a multi-fuel internal combustion engine and an approach for operating the fuel delivery system are provided. The fuel delivery system can be operated in two or more different fuel delivery modes according to operating conditions of the engine or fuel delivery system. A first example mode can be performed to concurrently deliver two or more fuels to the engine. A second example mode can be performed to transfer fuel from a first fuel storage tank to a second fuel storage tank. A third example mode can be performed to supply a fuel from a first fuel storage tank to at least two fuel injectors of each cylinder of the engine. In some embodiments, the various modes of operation may be selected by varying a fuel pressure that is provided by the fuel delivery system. | 02-04-2010 |
20100241323 | Enhanced Powertrain Performance During Knock Control - Various systems and methods are described for controlling combustion stability in an engine driving a transmission. One example method comprises limiting airflow to the engine in response to a spark timing retarded beyond a spark retard threshold, the limiting airflow to the engine reducing engine torque output and compensating for the reduction in engine torque output by adjusting a transmission operating parameter. | 09-23-2010 |
20100263636 | SYSTEM AND METHOD FOR IMPROVING FUEL VAPOR PURGING FOR AN ENGINE HAVING A COMPRESSOR - A system and method for storing and purging fuel vapors for an internal combustion engine comprising a compressor is presented. The system allows the canister to be purged even while the engine is operated at high engine load. | 10-21-2010 |
20100313847 | VEHICLE STABILITY AND SURGE CONTROL - In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example. | 12-16-2010 |
20100317487 | VEHICLE TRAJECTORY CONTROL SYSTEM - Systems and methods for controlling a throttle plate to adjust airflow to the engine are provided. A transmission having an input speed and an output speed and including a clutch and a driver-selectable transmission lever is controlled to adjust engine speed to a synchronous speed in a future gear ratio in response to driver foot pedal positions and driver-selectable transmission lever positions. | 12-16-2010 |
20110072791 | PARTICULATE FILTER REGENERATION IN AN ENGINE COUPLED TO AN ENERGY CONVERSION DEVICE - Systems and methods for controlling regeneration of a particulate filter downstream of an engine coupled to an energy conversion device are provided herein. One exemplary method includes, during first engine shutdown conditions, increasing excess oxygen to the particulate filter by spinning the engine with the energy conversion device, and regenerating the particulate filter. The method also includes, during second engine shutdown conditions, decreasing the excess oxygen to the particulate filter. | 03-31-2011 |
20110072792 | PARTICULATE FILTER REGENERATION DURING ENGINE SHUTDOWN - Various systems and method are described for controlling an engine having an exhaust system which includes a particulate filter. One example method comprises, after shutting down the engine and spinning down the engine to rest, operating a vacuum pump to draw fresh air through the exhaust system to an intake system, and regenerating at least a portion of the particulate filter during the engine rest. | 03-31-2011 |
20110072793 | PARTICULATE FILTER REGENERATION IN AN ENGINE - Systems and methods for controlling regeneration of a particulate filter downstream of an engine in a vehicle are provided herein. One exemplary method includes, during an engine shutdown, increasing a throttle opening and regenerating a particulate filter downstream of a three-way catalyst. The method also includes, during an engine start following an engine shutdown, setting one or more engine parameters based on whether the particulate filter was regenerated during a last engine shutdown before the engine start. | 03-31-2011 |
20110072795 | METHOD FOR REGENERATING A PARTICULATE FILTER FOR A BOOSTED DIRECT INJECTION ENGINE - A method for regenerating a particulate filter is disclosed. In one example, oxygen is pumped from the intake system of a direct injection turobocharged gasoline engine through a cylinder and into the exhaust system by a compressor. In this way, regeneration of a particulate filter may be accomplished without an auxiliary air supply. | 03-31-2011 |
20110072799 | PARTICULATE FILTER REGENERATION DURING ENGINE SHUTDOWN - Systems and methods for controlling regeneration of a particulate filter downstream of an engine in a vehicle are provided herein. One exemplary method includes, during first engine shutdown conditions, increasing excess oxygen to the particulate filter, and regenerating the particulate filter at least during a portion of engine shutdown. The method further includes during second engine shutdown conditions, decreasing the excess oxygen to the particulate filter at least during a portion of engine shutdown. | 03-31-2011 |
20110072800 | PARTICULATE FILTER REGENERATION IN AN ENGINE - Systems and methods for controlling regeneration of a particulate filter downstream of an engine having a plurality of cylinders are provided. One exemplary method includes, during first conditions, spinning down the engine to non-combusting engine rest, and regenerating the particulate filter at least during engine rest. The method also includes, during second conditions, regenerating the particulate filter during combustion of at least one cylinder of the engine. | 03-31-2011 |
20110072802 | PARTICULATE FILTER REGENERATION IN AN ENGINE - Systems and methods for controlling regeneration of a particulate filter positioned downstream of an engine in a vehicle are provided herein. One exemplary method includes, during combusting engine conditions, directing exhaust from the engine to a three-way catalyst and then to a particulate filter positioned downstream of the three-way catalyst. The method also includes, during non-combusting engine conditions and while the vehicle is in motion, directing fresh ram-air to the particulate filter to regenerate the particulate filter. | 03-31-2011 |
20110132335 | Stored Compressed Air Management for Improved Engine Performance - A method for providing air to a combustion chamber of an engine, the engine including a compressor and a boost tank selectably coupled to an intake manifold. The method includes varying a relative amount of engine exhaust in air pressurized in the boost tank based on engine operating conditions, and discharging the air pressurized in the boost tank to the intake manifold. | 06-09-2011 |
20110162620 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases. | 07-07-2011 |
20110168143 | Dual Throttle for Improved Tip-Out Stability in Boosted Engine System - A method for providing intake air to an engine in a vehicle includes forming a mixture of fresh air and treated exhaust, and compressing the mixture upstream of a first throttle valve coupled to an intake manifold of the engine. The method further includes, during a higher engine-load condition, admitting the mixture to the intake manifold via the first throttle valve, and, during a lower engine-load condition, admitting fresh air to the intake manifold via a second throttle valve. | 07-14-2011 |
20110174266 | METHOD AND SYSTEM FOR CONTROLLING VACUUM - An engine with a two vacuum sources is disclosed. In one example, a valve position is adjusted in when engine load is low and intake manifold pressure is low to arbitrate vacuum between the two vacuum sources. The approach may increase engine operating efficiency during at least some conditions. | 07-21-2011 |
20110183812 | METHOD AND SYSTEM FOR CONTROLLING ENGINE AIR - An engine with a fast vacuum recovery brake booster system is disclosed. In one example, an actuator is adjusted in response to a flow between the brake booster and an engine intake manifold. Operation of the engine and vehicle brakes may be improved especially when the engine is boosted. | 07-28-2011 |
20110202260 | SPARK PLUG DEGRADATION DETECTION - Methods and systems are provided for identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken. | 08-18-2011 |
20110203269 | Engine Vacuum System - A vacuum pump onboard a vehicle provides vacuum for a brake booster and to control the electronic vacuum regulation valve (EVRV) valve of a wastegate on a turbocharger. Commands to the EVRV are based on an operating condition of an engine and the vacuum level in the vacuum system. In one example, a vacuum sensor is provided to determine vacuum proximate the EVRV. In another example, the vacuum proximate the EVRV is modeled based on the vacuum at the brake booster, which may be determined by a vacuum sensor coupled to the brake booster. | 08-25-2011 |
20110252785 | Stored Compressed Air Management for Improved Engine Performance - A method for providing air to a combustion chamber of an engine, the engine including a compressor and a boost tank selectably coupled to an intake manifold. The method includes varying a relative amount of engine exhaust in air pressurized in the boost tank based on engine operating conditions, and discharging the air pressurized in the boost tank to the intake manifold. | 10-20-2011 |
20110287892 | VEHICLE TRAJECTORY CONTROL SYSTEM - Systems and methods for controlling a throttle plate to adjust airflow to the engine are provided. A transmission having an input speed and an output speed and including a clutch and a driver-selectable transmission lever is controlled to adjust engine speed to a synchronous speed in a future gear ratio in response to driver foot pedal positions and driver-selectable transmission lever positions. | 11-24-2011 |
20120016566 | Method for Purging Fuel Vapors - A method for improving purging of fuel vapors from a boosted engine is presented. In one embodiment, the method increases the efficiency of a venturi that supplies vacuum to purge fuel vapors from a vapor storage canister. | 01-19-2012 |
20120024267 | Stored Compressed Air Management for Improved Engine Performance - A method for providing air to a combustion chamber of an engine, the engine including a compressor and a boost tank selectably coupled to an intake manifold. The method includes varying a relative amount of engine exhaust in air pressurized in the boost tank based on engine operating conditions, and discharging the air pressurized in the boost tank to the intake manifold. | 02-02-2012 |
20120096849 | METHOD AND SYSTEM FOR IMPROVING VEHICLE BRAKING - An engine with a positive pressure assisted brake booster is disclosed. In one example, an operator applying vehicle brakes is assisted by positive pressure provided by a compressor coupled to an engine of the vehicle. Operation of the vehicle brakes may be improved especially when engine vacuum is limited. | 04-26-2012 |
20120097130 | METHOD AND SYSTEM FOR CONTROLLING VACUUM - An engine with a two vacuum sources is disclosed. In one example, a valve position is adjusted in when engine load is low and intake manifold pressure is low to arbitrate vacuum between the two vacuum sources. The approach may increase engine operating efficiency during at least some conditions. | 04-26-2012 |
20120116655 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases. | 05-10-2012 |
20120215425 | METHOD FOR COMPENSATING AN OPERATING IMBALANCE BETWEEN DIFFERENT BANKS OF A TURBOCHARGED ENGINE - A method for controlling differences in cylinder mixtures for a two cylinder bank engine having a turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder mixture variation. | 08-23-2012 |
20120227382 | PARTICULATE FILTER REGENERATION DURING ENGINE SHUTDOWN - Various systems and method are described for controlling an engine having an exhaust system which includes a particulate filter. One example method comprises, after shutting down the engine and spinning down the engine to rest, operating a vacuum pump to draw fresh air through the exhaust system to an intake system, and regenerating at least a portion of the particulate filter during the engine rest. | 09-13-2012 |
20120237367 | Method and System for Providing Vacuum - A vacuum source arbitration system is disclosed. In one example, vacuum is supplied to a vacuum reservoir via an ejector during a first condition, and vacuum is supplied to the vacuum reservoir via an engine intake manifold during a second condition. The approach may provide a desired level of vacuum in a reservoir while reducing engine fuel consumption. | 09-20-2012 |
20120285421 | Method and System for Controlling Engine Vacuum Production - A method for controlling engine vacuum production is disclosed. In one example, one or more air sources to an engine intake manifold are closed so as to increase an amount of air drawn from another air source. The method may increase a rate of vacuum supplied to a vacuum actuated device so as to improve operation of the vacuum actuated device. | 11-15-2012 |
20120303235 | VEHICLE SURGE AND SPARK TIMING CONTROL - A method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting spark timing in the combustion chamber of the engine in response to a knock indication, and further adjusting spark timing in response to the vehicle acceleration to reduce surge. | 11-29-2012 |
20120318047 | METHOD AND SYSTEM FOR DETERMINING VACUUM LEAKS - A method for detecting leaks within a vacuum system is described. The method may detect vacuum system leaks responsive to vacuum pump speed. The method can compensate for changes in barometric pressure so that a single leak threshold may be provided for all altitudes and barometric pressures. | 12-20-2012 |
20120322614 | Enhanced Powertrain Performance During Knock Control - Various systems and methods are described for controlling combustion stability in an engine driving a transmission. One example method comprises limiting airflow to the engine in response to a spark timing retarded beyond a spark retard threshold, the limiting airflow to the engine reducing engine torque output and compensating for the reduction in engine torque output by adjusting a transmission operating parameter. | 12-20-2012 |
20130013172 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases. | 01-10-2013 |
20130032105 | METHOD FOR COMPENSATING AN OPERATING IMBALANCE BETWEEN DIFFERENT BANKS OF A TURBOCHARGED ENGINE - A method for controlling differences in cylinder mixtures for a two cylinder bank engine having a turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder mixture variation. | 02-07-2013 |
20130066539 | METHOD AND SYSTEM FOR IMPROVING ENGINE STARTING - An engine system and method for improving engine starting are disclosed. In one example, engine port throttles are adjusted differently during automatic and operator initiated engine starts. The system and method may improve engine torque control during an engine start. | 03-14-2013 |
20130066540 | METHOD AND SYSTEM FOR ADJUSTING PORT THROTTLES - An engine system and method for improving engine starting are disclosed. In one example, two engine cylinder port throttles are adjusted differently during engine starting. The system and method may improve engine torque control during an engine start. | 03-14-2013 |
20130096788 | VEHICLE TRAJECTORY CONTROL SYSTEM - Systems and methods for controlling a throttle plate to adjust airflow to the engine are provided. A transmission having an input speed and an output speed and including a clutch and a driver-selectable transmission lever is controlled to adjust engine speed to a synchronous speed in a future gear ratio in response to driver foot pedal positions and driver-selectable transmission lever positions. | 04-18-2013 |
20130113270 | METHOD AND SYSTEM FOR BRAKE CONTROL - Methods and systems are provided to reduce a hard brake pedal feel. A brake control variable is adjusted in anticipation of a hard pedal condition to increase hydraulic brake line pressure and maintain a normal pedal feel. A pedal force is inferred from brake line pressure relative to brake booster vacuum. | 05-09-2013 |
20130123067 | METHOD AND SYSTEM FOR CONTROLLING ENGINE AIR - An engine with a fast vacuum recovery brake booster system is disclosed. In one example, an actuator is adjusted in response to a flow between the brake booster and an engine intake manifold. Operation of the engine and vehicle brakes may be improved especially when the engine is boosted. | 05-16-2013 |
20130146024 | METHOD FOR IMPROVING ENGINE STARTING - A method for improving exhaust after treatment initial warm up during engine starting is presented. In one example, the method adjusts an engine air flow amount to a level where a desired substantially constant heat flux is provided by the engine to an exhaust after treatment device. The method may reduce fuel consumption and a need for a vacuum pump to provide vacuum to vacuum consumers of a vehicle during exhaust after treatment heating. | 06-13-2013 |
20130239599 | VEHICLE CLIMATE CONTROL METHOD - A method for controlling a climate control system is disclosed. In one example, the climate control system includes an air mixing valve that is adjusted in response to a energy conversion device load demand. The method may provide improved climate control in a vehicle cabin during high energy conversion device load conditions. | 09-19-2013 |
20130284155 | METHOD FOR PURGING FUEL VAPORS - A method for improving purging of fuel vapors from a boosted engine is presented. In one embodiment, the method increases the efficiency of a venturi that supplies vacuum to purge fuel vapors from a vapor storage canister. | 10-31-2013 |
20140031170 | METHOD AND SYSTEM FOR OPERATING A VEHICLE POWERTRAIN - A system and method for operating a vehicle powertrain are described. In one example, a torque converter that has a variable K factor is adjusted to improve vehicle operation. The system and method may improve vehicle launch and vehicle operation at lower vehicle speeds. | 01-30-2014 |
20140069534 | EJECTOR SYSTEM FOR A VEHICLE - A selectively operable vacuum source designed to reduce leakage is disclosed. In one example, the vacuum source is at least partially within an engine air intake system. The approach may reduce a number of sensors required to diagnose whether or not leaks are present within the vacuum source. | 03-13-2014 |
20140100081 | VEHICLE TRAJECTORY CONTROL SYSTEM - Systems and methods for controlling a throttle plate to adjust airflow to the engine are provided. A transmission having an input speed and an output speed and including a clutch and a driver-selectable transmission lever is controlled to adjust engine speed to a synchronous speed in a future gear ratio in response to driver foot pedal positions and driver-selectable transmission lever positions. | 04-10-2014 |
20140100765 | APPROACH FOR CONTROLLING OPERATION OF OIL INJECTORS - Various embodiments of systems and methods related to controlling oil injection for piston cooling in an engine are disclosed. In one embodiment, a method includes during an engine cold start event, enabling oil injection onto a piston of an engine, disabling oil injection after the engine cold start event, and re-enabling oil injection after the engine cold start event based on a first operating parameter. | 04-10-2014 |
20140102086 | METHOD AND SYSTEM FOR BRAKE CONTROL - Methods and systems are provided to reduce a hard brake pedal feel. A brake control variable is adjusted in anticipation of a hard pedal condition to increase hydraulic brake line pressure and maintain a normal pedal feel. A pedal force is inferred from brake line pressure relative to brake booster vacuum. | 04-17-2014 |
20140123941 | METHOD AND SYSTEM FOR VACUUM GENERATION - Methods and systems are provided for improving the vacuum generation efficiency of an ejector coupled to in an engine system. Vacuum is generated at the ejector at a faster rate but to a lower level by opening a throttle upstream of the ejector. Vacuum is then raised to a higher level but at a slower rate by closing the throttle upstream of the ejector. | 05-08-2014 |
20140130775 | METHOD AND SYSTEM FOR PROVIDING VACUUM - A vacuum source arbitration system is disclosed. In one example, vacuum is supplied to a vacuum reservoir via an ejector during a first condition, and vacuum is supplied to the vacuum reservoir via an engine intake manifold during a second condition. The approach may provide a desired level of vacuum in a reservoir while reducing engine fuel consumption. | 05-15-2014 |
20140136081 | SPARK PLUG DEGRADATION DETECTION - Methods and systems are provided for identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken. | 05-15-2014 |
20140137544 | BRAKE BOOSTER FAULT DIAGNOSTICS - Methods and systems for indicating brake booster degradation when braking is suspended may include comparing expected brake booster vacuum with measured brake booster vacuum, and indicating a fault when the difference between the two values exceeds a threshold. In one example, the expected brake booster vacuum is computed differently depending on whether intake manifold vacuum or vacuum from one or more vacuum-powered pumps dominates evacuation of the brake booster. Expected brake booster vacuum may be computed based on expected brake booster mass air flow and brake booster volume; when measured brake booster vacuum is less than intake manifold vacuum, expected brake booster mass air flow may be computed as a function of intake manifold vacuum and measured brake booster vacuum, whereas expected brake booster mass air flow may be computed based on flow characteristics of the pump(s) when measured brake booster vacuum is not less than intake manifold vacuum. | 05-22-2014 |
20140150755 | BOOSTED ENGINE CHARGE AIR COOLER CONDENSATION REDUCTION DEVICE - Methods and systems are provided for providing auxiliary heat to a charge air cooler to reduce condensate formation. A coolant valve may control the delivery of heated engine coolant to the inlet side of the charge air cooler. The coolant valve may be adjusted based on condensate formation in the charge air cooler and a temperature at the charge air cooler outlet. | 06-05-2014 |
20140288809 | METHOD AND SYSTEM FOR ADJUSTING PORT THROTTLES - An engine system and method for improving engine starting are disclosed. In one example, two engine cylinder port throttles are adjusted differently during engine starting. The system and method may improve engine torque control during an engine start. | 09-25-2014 |
20140306513 | VEHICLE BRAKING SYSTEM AND METHOD - A system and method for increasing brake line pressure after brake booster vacuum has been exhausted is presented. In one example, brake line pressure is increased at a same rate after brake booster vacuum is exhausted as before brake booster vacuum is exhausted. | 10-16-2014 |
20140352669 | METHODS AND SYSTEMS FOR PROVIDING TRANSIENT TORQUE RESPONSE - A method and system for providing a suitable engine torque response during a transient condition is presented. In one example, when a desired inlet manifold pressure is greater than a throttle inlet pressure of a first throttle, a second throttle positioned upstream from the first throttle is opened to increase the throttle inlet pressure. The method may provide an appropriate torque response while minimizing impact on fuel economy. | 12-04-2014 |
20140365094 | METHOD FOR INCREASING VACUUM PRODUCTION FOR A VEHICLE - Methods and systems for providing vacuum to a vehicle are described. In one example, a method adjusts an application force of a transmission clutch in response to a request for additional vacuum. | 12-11-2014 |
20150019106 | METHOD AND SYSTEM FOR AN ENGINE FOR DETECTION AND MITIGATION OF INSUFFICIENT TORQUE - A method comprises in response to an oil pressure below a threshold oil pressure, and an engine speed below a threshold engine speed, restricting cam movement while the vehicle is moving, and during a vehicle stopped condition, overriding the restricted cam movement. | 01-15-2015 |
20150021140 | METHOD AND SYSTEM FOR REDUCING VACUUM CONSUMPTION IN A VEHICLE - A system and method for conserving vacuum within a vehicle is described. In one example, vacuum is conserved via limiting volume expansion of a brake booster working chamber. | 01-22-2015 |
20150021141 | METHOD AND SYSTEM FOR REDUCING VACUUM USE IN A VEHICLE - A system and method for conserving vacuum within a vehicle is described. In one example, a vacuum level in a working chamber of a vacuum operated brake booster is controlled so as to limit vacuum consumption. | 01-22-2015 |
20150025777 | METHOD AND SYSTEM FOR INCREASING VACUUM GENERATION BY AN ENGINE - A method and a system for providing vacuum via an engine are described. In one example, introduction of a gaseous fuel is ceased in response to a request for the engine to provide vacuum to a vehicle vacuum system. | 01-22-2015 |
20150045185 | METHODS AND SYSTEMS FOR CONTROLLING CATALYST TEMPERATURE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, operation of a driveline disconnect clutch is based on temperature conditions of a catalyst. The driveline disconnect clutch may not be opened if catalyst temperature is greater than a threshold temperature so that the catalyst may be cooled. | 02-12-2015 |
20150047342 | METHODS AND SYSTEMS FOR BOOST CONTROL - Methods and systems are provided for coordinating adjustments to a compressor recirculation valve with adjustments to a binary flow turbine scroll valve to reduce surge. The scroll valve is closed to increase turbine energy while the compressor recirculation valve is opened to increase compressor flow. Concurrent adjustments to a wastegate may be used to provide boost pressure control. | 02-19-2015 |
20150072833 | METHOD AND SYSTEM FOR OPERATING A VEHICLE POWERTRAIN - A system and method for operating a vehicle powertrain are described. In one example, a torque converter that has a variable K factor is adjusted to improve vehicle operation. The system and method may improve vehicle launch and vehicle operation at lower vehicle speeds. | 03-12-2015 |