Patent application number | Description | Published |
20090066337 | METHOD FOR DETERMINING VALVE DEGRADATION - A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation. | 03-12-2009 |
20100017070 | STABILITY CONTROL AND INCLINED SURFACE CONTROL USING A COMMON SIGNAL SOURCE - A method and system are disclosed for controlling a vehicle. The method includes adjusting a first actuator to increase vehicle stability during vehicle traveling conditions, the actuator adjusted in response to a vehicle acceleration sensor. The method also includes adjusting a second actuator to maintain vehicle position during stopped vehicle conditions on an inclined surface, the second actuator adjusted in response to the vehicle acceleration sensor. | 01-21-2010 |
20100175462 | VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS - Methods and systems are provided for monitoring cylinder valve deactivation in an engine operating with a plurality of cylinder valves. One example method comprises indicating valve degradation based on an indication of manifold pressure over a plurality of immediately successive induction events of the engine, said indication responsive to increases and decreases in the indication of manifold pressure correlated to the induction events of engine cylinders and further correlated to whether cylinders are commanded to be activated or deactivated. | 07-15-2010 |
20100175463 | VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS - Methods and systems are provided for monitoring cylinder valve deactivation of a cylinder valve of an engine. One example method comprises, indicating degradation of cylinder valve deactivation in response to manifold pressure at or around a characteristic frequency. | 07-15-2010 |
20100211297 | COORDINATION OF VARIABLE CAM TIMING AND VARIABLE DISPLACEMENT ENGINE SYSTEMS - Systems and methods are provided for operating an internal combustion engine including a variable cam timing (VCT) mechanism in cooperation with a plurality of deactivatable cylinders, each cylinder with a plurality of cylinder valves. One example method comprises, operating at a first cylinder valve timing before a transition of reactivating deactivated cylinders, and, before the transition, advancing cylinder valve timing from the first valve timing, where after the transition the cylinder valve timing remains at a second valve timing, the second valve timing advanced relative to the first valve timing. | 08-19-2010 |
20100280739 | COORDINATION OF VARIABLE CAM TIMING AND VARIABLE DISPLACEMENT ENGINE SYSTEMS - A method of controlling an engine with a first group of cylinders having selectively deactivatable cylinders valves and a variable camshaft timing actuator coupled in a hydraulic system is described. In one example, the method includes during a first mode where the first group of cylinders is activated to carry out combustion cycles, adjusting the hydraulic system with a first gain based on cam timing feedback information and/or maintaining a null position of the actuator by adjusting a control signal to the hydraulic system to within a first value range. During a second mode where the first group of cylinders is deactivated, the method includes adjusting the hydraulic system with a second gain based on cam timing feedback information, the second gain higher than the first gain and/or maintaining the null position of the actuator by adjusting the control signal to the hydraulic system to within a second value range. | 11-04-2010 |
20100288037 | Method for Determining Valve Degradation - A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation. | 11-18-2010 |
20110041493 | METHODS AND SYSTEMS FOR TURBOCHARGER CONTROL - Methods are provided for controlling a turbocharged engine having a throttle and a turbocharger. One example method comprises, moving the throttle during boosted conditions, separating out effects on the throttle inlet pressure into a first portion corresponding to disturbances caused by the movement of the throttle, and a second, remaining, portion. The method further comprises adjusting the turbocharger based on the second portion and not the first portion. | 02-24-2011 |
20110045948 | METHODS AND SYSTEMS FOR TURBOCHARGER CONTROL - Methods and systems are provided for controlling a vehicle engine, the engine including a turbocharger and a transmission. One example method comprises, operating the transmission at a first lower gear with a first boost level, increasing the boost from the first boost level before completing a shift from the first lower gear to a second higher gear, and after completing the shift, operating the transmission at the second higher gear with the increased boost. | 02-24-2011 |
20110066357 | INFERRED OIL RESPONSIVENESS USING PRESSURE SENSOR PULSES - A system and method for controlling an internal combustion engine include determining oil responsiveness based on pressure variations associated with oil pump pulses in response to a stimulus, and controlling the engine based on the determined oil responsiveness. The stimulus may be a change in oil temperature, engine speed, or commanded pump pressure, for example. The system and method may also use the rate of change of mean oil pressure to determine the oil responsiveness or measure of oil viscosity. Oil responsiveness may be used to control hydraulic actuators, such as variable cam timing devices, or valve deactivation devices. | 03-17-2011 |
20110137543 | METHOD FOR STARTING AN ENGINE - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method controls a transition from split fuel injection timing during an engine start to single event fuel injection during idle speed or engine torque control modes. The method better manages vehicle launch performance when the engine is restarted while coupled to an automatic transmission that is in gear. | 06-09-2011 |
20110144883 | Engine Control with Valve Operation Monitoring Using Camshaft Position Sensing - A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include monitoring valve operation by analyzing camshaft position to detect valve operation inconsistent with a current cylinder state (activated or deactivated) and controlling the engine in response to detecting the inconsistent operation. The camshaft position may be used to produce a surrogate signal indicative of intake/exhaust valve lift generated using camshaft sensor tooth deviation relative to an expected or reference tooth position for a corresponding crankshaft position and compared to a corresponding threshold. The surrogate signal indicative of valve lift may also be generated by pattern matching or correlation of one or more reference tooth position patterns to a measured or inferred tooth position pattern. | 06-16-2011 |
20110144888 | ENGINE CONTROL WITH VALVE DEACTIVATION MONITORING USING EXHAUST PRESSURE - A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include controlling the engine in response to detecting opening of an exhaust valve after deactivation based measured or inferred exhaust pressure changes after deactivation. In one embodiment, controlling the engine includes reactivating one or more deactivated cylinders/valves, inhibiting subsequent deactivation, and/or storing a diagnostic code in a computer readable storage medium in response to detecting valve opening after deactivation. | 06-16-2011 |
20110209690 | Method and System for Providing Air to an Engine - Systems and methods for supplying air to an engine are disclosed. In one example, an air inlet throttle is at least partially closed in response to a change in engine torque request. In another example, the air inlet throttle is adjusted in conjunction with adjusting an engine throttle. The approach can reduce compressor noise and may reduce the possibility of compressor surge. | 09-01-2011 |
20120115679 | METHOD FOR CONTROLLING A TRANSMISSION COUPLED TO AN ENGINE THAT MAY BE AUTOMATICALLY STOPPED - Methods and systems for controlling a transmission coupled to an engine during an engine start are presented. In one example, a method adjusts a transmission tie-up force in response to an indication of transmission slip. The method may improve vehicle launch for stop/start vehicles. | 05-10-2012 |
20120138014 | METHOD FOR FUELING AN ENGINE AT START - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, fuel injection timing is selectively adjusted based on engine stop position and amount of time the engine is stopped. The method may improve engine starting and lower engine noise. | 06-07-2012 |
20120208674 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling an engine system with a variable cam timing device. In one example, the variable cam timing device is operated to adjust engine valve timing differently at engine stop based on whether the engine stop is in response to an operator request or in response to an automatic controller initiated engine stop without an operator request. | 08-16-2012 |
20120247101 | Method and System for Providing Air to an Engine - Systems and methods for supplying air to an engine are disclosed. In one example, an air inlet throttle is at least partially closed in response to a change in engine torque request. In another example, the air inlet throttle is adjusted in conjunction with adjusting an engine throttle. The approach can reduce compressor noise and may reduce the possibility of compressor surge. | 10-04-2012 |
20120296550 | ENGINE CONTROL WITH VALVE OPERATION MONITORING USING CAMSHAFT POSITION SENSING - A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include monitoring valve operation by analyzing camshaft position to detect valve operation inconsistent with a current cylinder state (activated or deactivated) and controlling the engine in response to detecting the inconsistent operation. The camshaft position may be used to produce a surrogate signal indicative of intake/exhaust valve lift generated using camshaft sensor tooth deviation relative to an expected or reference tooth position for a corresponding crankshaft position and compared to a corresponding threshold. The surrogate signal indicative of valve lift may also be generated by pattern matching or correlation of one or more reference tooth position patterns to a measured or inferred tooth position pattern. | 11-22-2012 |
20120309589 | METHODS AND SYSTEMS FOR TURBOCHARGER CONTROL - Methods and systems are provided for controlling a vehicle engine, the engine including a turbocharger and a transmission. One example method comprises, operating the transmission at a first lower gear with a first boost level, increasing the boost from the first boost level before completing a shift from the first lower gear to a second higher gear, and after completing the shift, operating the transmission at the second higher gear with the increased boost. | 12-06-2012 |
20130013165 | VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS - Methods and systems are provided for monitoring cylinder valve deactivation in an engine operating with a plurality of cylinder valves. One example method comprises indicating valve degradation based on an indication of manifold pressure over a plurality of immediately successive induction events of the engine, the indication responsive to increases and decreases in the indication of manifold pressure correlated to the induction events of engine cylinders and further correlated to whether cylinders are commanded to be activated or deactivated. | 01-10-2013 |
20130074526 | METHOD FOR TRANSITIONING BETWEEN VEHICLE CLIMATE CONTROL SYSTEM MODES - A method for controlling transitions between activating and deactivating a vehicle air conditioner compressor is disclosed. In one example, displacement of the air conditioner compressor is adjusted before the air conditioner is coupled to an energy conversion device. The method may provide smooth transitions between different air conditioner compressor control modes. | 03-28-2013 |
20130074529 | METHOD FOR CONTROLLING VEHICLE CLIMATE CONTROL SYSTEM LOAD - A method for controlling torque of an air conditioner compressor is disclosed. In one example, the air conditioner compressor is a variable displacement compressor. The method may provide may improve vehicle acceleration response while at the same time providing cooling capacity to a vehicle cabin. | 03-28-2013 |
20130074537 | METHOD FOR OPERATING A VEHICLE CLIMATE CONTROL SYSTEM - A method for controlling torque of an air conditioner compressor is disclosed. In one example, the air conditioner compressor is a variable displacement compressor. The method may provide smooth transitions between different air conditioner compressor torques. | 03-28-2013 |
20130116088 | METHOD FOR STARTING AN ENGINE - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, the method adjusts a desired engine speed to at least two levels during engine speed run-up from cranking to engine idle speed. The method may improve vehicle launch for stop/start vehicles. | 05-09-2013 |
20130125847 | VARIABLE CAM CONTROL IN AN ENGINE - A method for controlling variable camshaft timing is provided. In one example, an engine method comprises adjusting a variable cam actuator responsive to cam position feedback from even and uneven readings of a cam sensor. In this way, increased cam position feedback may be provided to improve cam positioning control. | 05-23-2013 |
20130184966 | METHOD AND SYSTEM FOR ENGINE TORQUE CONTROL - Methods and systems are provided for improving vehicle torque control accuracy. Data points of an engine torque data set are adjusted en masse by an on-board vehicle controller while also being adjusted individually by an off-board controller. By adjusting engine operation based on a torque data set that is updated by each of the on-board and off-board controllers, engine torque errors can be reliably determined and compensated for. | 07-18-2013 |
20130191005 | METHOD AND SYSTEM FOR OPPORTUNISTICALLY AUTOMATICALLY STOPPING AN ENGINE OF A VEHICLE - Methods and systems for stopping and starting an engine automatically are presented. In one example, a method inhibits automatic engine stopping in response to output of an on-board camera. The method prevents engine stopping during conditions where little fuel may be saved via automatically stopping the engine. | 07-25-2013 |
20130199496 | METHOD FOR RESTARTING AN ENGINE - Methods and systems for controlling an engine that may be automatically stopped and started are presented. In one example, a method adjusts a position of an air inlet throttle according to engine position and in response to an operator change of mind to restart an engine that is being automatically stopped. | 08-08-2013 |
20130238227 | METHOD FOR FUELING AN ENGINE AT START - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, fuel injection timing is selectively adjusted based on engine stop position and amount of time the engine is stopped. The method may improve engine starting and lower engine noise. | 09-12-2013 |
20130291830 | METHODS AND SYSTEMS FOR ENGINE STARTING DURING A SHIFT - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, torque demand of a driveline after a shift is forecast to determine if it is desirable to start the engine early so that engine torque is available after the shift. The approach may improve vehicle torque response. | 11-07-2013 |
20130292195 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE POWER TAKE OFF - Systems and methods for improving operation of a power take off are presented. In one example, the power take off may be rotated in two different directions. The approaches may improve operation of a power take off device. | 11-07-2013 |
20130296098 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE CONTROL DURING VARYING DRIVING CONDITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operating modes may be adjusted in response to driving surface conditions. The approaches may improve vehicle drivability and reduce driveline degradation. | 11-07-2013 |
20130296101 | METHODS AND SYSTEMS FOR A FOUR WHEEL DRIVE VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operation may be adjusted in response to operating the hybrid vehicle in a four wheel drivel low gear range. The approaches may improve vehicle drivability and reduce driveline degradation. | 11-07-2013 |
20130296102 | METHODS AND SYSTEMS FOR EXTENDING REGENERATIVE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an electrical load may be automatically activated to consume electrical energy produced during driveline braking so that driveline braking may be extended. The electrical load may be a windscreen heater or other device. | 11-07-2013 |
20130296119 | METHODS AND SYSTEMS FOR CONDITIONALLY ENTERING A DRIVELINE SAILING MODE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline may selectively enter a sailing mode to provide quick driveline torque response with reduced impact on fuel economy. | 11-07-2013 |
20130296120 | METHODS AND SYSTEMS FOR DRIVELINE SAILING MODE ENTRY - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, entry conditions for entering a driveline sailing mode are described. Driveline sailing mode may improve driveline torque response and vehicle drivability. | 11-07-2013 |
20130296121 | METHODS AND SYSTEMS FOR ENGINE STOPPING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is stopped to a desired position via slipping a driveline disconnect clutch so that engine starting may be improved. | 11-07-2013 |
20130296122 | METHODS AND SYSTEMS FOR OPERATING A VEHICLE DRIVELINE RESPONSIVE TO EXTERNAL CONDITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, external data are a basis for operating a driveline disconnect clutch. For example, a vehicle destination may be a basis for opening a driveline disconnect clutch and beginning to discharging an energy storage device so that fewer hydrocarbons may be consumed by the vehicle. | 11-07-2013 |
20130296123 | METHODS AND SYSTEMS FOR ADAPTING A DRIVELINE DISCONNECT CLUTCH TRANSFER FUNCTION - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a transfer function of a driveline disconnect clutch is adapted. | 11-07-2013 |
20130296126 | METHODS AND SYSTEMS FOR ENGINE CRANKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine may be started in one of two ways depending on operating conditions. In particular, the engine may be started via a lower power output electric machine or a higher power output electric machine. | 11-07-2013 |
20130296130 | METHODS AND SYSTEMS FOR TRANSITIONING BETWEEN BRAKING MODES - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between driveline braking and wheel brakes is provided. | 11-07-2013 |
20130296132 | METHODS AND SYSTEMS FOR ADJUSTING DRIVELINE DISCONNECT CLUTCH OPERATION - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, torque transferred via a driveline disconnect clutch is estimated based on characteristics of a torque converter to improve driveline operation. | 11-07-2013 |
20130296136 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline disconnect clutch operation is adjusted in response to vehicle mass so that the vehicle may operate similarly at lower and higher vehicle masses. | 11-07-2013 |
20130297112 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 11-07-2013 |
20130297113 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 11-07-2013 |
20130297114 | METHODS AND SYSTEMS FOR TRANSITIONING BETWEEN DRIVELINE BRAKING MODES - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between regenerative braking and engine braking is described. | 11-07-2013 |
20130297115 | METHODS AND SYSTEMS FOR OPERATING A DRIVELINE DISCONNECT CLUTCH RESPONSIVE TO ENGINE OPERATING CONDITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline disconnect clutch transfer function may be adapted in response to engine operating conditions during closing of the driveline disconnect clutch. | 11-07-2013 |
20130297116 | METHODS AND SYSTEMS FOR OPERATING A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is accelerated to a speed of a driveline integrated starter/generator before the engine is coupled to the driveline integrated starter/generator. | 11-07-2013 |
20130297117 | METHODS AND SYSTEMS PROVIDING DRIVELINE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline braking may transition from regenerative braking to engine braking to reduce the possibility of battery degradation. | 11-07-2013 |
20130297118 | METHODS AND SYSTEMS FOR LAUNCHING A VEHICLE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is started and idled before engine torque is required so that driveline torque response may be improved. | 11-07-2013 |
20130297119 | METHODS AND SYSTEMS FOR ADJUSTING DRIVELINE OPERATION DURING AN ACCELERATOR TIP-OUT - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine may be operated at an idle speed while a driveline disconnect clutch separating the engine from a driveline is open in response to a reduction in driver demand torque. Engine torque may be applied to the driveline by simply closing the driveline disconnect clutch. | 11-07-2013 |
20130297120 | METHODS AND SYSTEMS FOR PROVIDING UNIFORM DRIVELINE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, negative torque of an electric machine is adjusted to mimic negative torque of an engine during engine braking so that the vehicle may transition from regenerative braking to engine braking in a seamless manner. | 11-07-2013 |
20130297121 | METHODS AND SYSTEMS FOR DRIVELINE MODE TRANSITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between regenerative braking and providing positive torque to a driveline is presented. | 11-07-2013 |
20130297122 | Methods and Systems for a Driveline Disconnect Clutch - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation for a driveline disconnect clutch is provided. The approaches may reduce driveline torque disturbances. | 11-07-2013 |
20130297123 | METHODS AND SYSTEMS FOR REDUCING GEAR LASH NOISE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline gear lash gear tooth to gear tooth impact may be reduce via adjusting operation of an electric machine. | 11-07-2013 |
20130297157 | METHODS AND SYSTEMS FOR IMPROVING TRANSMISSION SHIFTING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is couple to a transmission in response to a transmission upshift to reduce transmission output shaft torque disturbances. | 11-07-2013 |
20130297187 | METHODS AND SYSTEMS FOR ADJUSTING CYLINDER AIR CHARGE - Systems and methods for improving operation of an engine are presented. In one example, a position of a throttle is adjusted along with other actuators to improve engine starting. | 11-07-2013 |
20140039781 | NOX CONTROL DURING ENGINE IDLE-STOP OPERATIONS - Methods and systems are provided for improving engine exhaust emissions while enabling exhaust catalyst regeneration following an engine lean event. Prior to a VDE event, or prior to an engine idle-stop, ammonia is produced and stored on an exhaust underbody SCR catalyst. Then, during the engine restart after the VDE mode or the idle-stop, the stored ammonia is used to treat exhaust NOx species while an upstream exhaust underbody three-way catalyst is regenerated. | 02-06-2014 |
20140046529 | METHODS AND SYSTEMS FOR OPERATING A DRIVELINE DISCONNECT CLUTCH - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, application of a driveline disconnect clutch to start an engine is described. The approach applies the driveline disconnect clutch to rotate an engine and at least partially disengages the driveline disconnect clutch to reduce the possibility of a reduction in torque applied to vehicle wheels. | 02-13-2014 |
20140057755 | METHOD FOR STARTING AN ENGINE - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, the method adjusts a desired engine speed to at least two levels during engine speed run-up from cranking to engine idle speed. The method may improve vehicle launch for stop/start vehicles. | 02-27-2014 |
20140067239 | METHOD AND SYSTEM FOR IMPROVING AUTOMATIC ENGINE STOPPING - A method and system for improving automatic engine stopping and starting is presented. In one example, the method adjusts conditions for engine stopping in response to operating conditions that are evaluated according to one or more cost functions. The method may improve vehicle fuel economy and limit driver annoyances. | 03-06-2014 |
20140080668 | DECELERATION FUEL SHUT OFF SCHEDULING BASED ON VEHICLE PARAMETERS - A method for enacting DFSO in a motor vehicle having an engine and a transmission. The method includes, during a condition of normal engine-braking efficiency, disabling the DFSO below a higher gear of the transmission. During a condition of reduced engine-braking efficiency, by contrast, the DFSO is disabled below a lower gear of the transmission. | 03-20-2014 |
20140100082 | METHOD AND SYSTEM FOR STOPPING AN ENGINE - A method and a system for improving operation of a hybrid vehicle are presented. In one example, a disconnect clutch is operated in response to an engine stop request to adjust an engine stopping position during an engine shutdown. The approach may reduce engine starting time after the engine stop. | 04-10-2014 |
20140100727 | METHOD AND SYSTEM FOR OPERATING A HYBRID POWERTRAIN - A method and a system for improving operation of a hybrid vehicle are presented. In one example, operation of a hybrid driveline is adjusted in response to driving conditions that may cause wheel slip or a stuck vehicle. The approach may reduce driveline wear and improve vehicle drivability. | 04-10-2014 |
20140106927 | METHOD AND SYSTEM FOR IMPROVING VEHICLE LAUNCH - A method and a system for improving operation of a hybrid vehicle are presented. In one example, a clutch is operated while a vehicle is stopped and while a vehicle brake is applied to determine a clutch torque transfer function. The approach may improve vehicle launch after an engine stop. | 04-17-2014 |
20140121060 | METHOD AND SYSTEM FOR CONTROLLING CATALYST TEMPERATURE - A method and a system for improving operation of a hybrid vehicle are presented. In one example, an engine exhaust after treatment device is cooled at an opportunistic time. The approach may provide improved cooling for exhaust after treatment devices and it may also improve vehicle emissions. | 05-01-2014 |
20140144125 | SCR CATALYST DIAGNOSTICS - In one embodiment, a method for an engine comprises operating the engine with an upstream exhaust sensor, intermediate exhaust sensor, and downstream exhaust sensor each indicating rich, adjusting engine operation to operate the engine with an upstream exhaust sensor, intermediate exhaust sensor, and downstream exhaust sensor each indicating lean, adjusting engine operation to operate the engine with the upstream exhaust sensor indicating rich and the intermediate and downstream exhaust sensors each indicating lean, and indicating degradation of an SCR catalyst based on when the intermediate and downstream exhaust sensors switch from lean to rich. | 05-29-2014 |
20140158073 | VARIABLE DISPLACEMENT SOLENOID CONTROL - Methods are provided for improved control of valve activation/deactivation mechanisms. One example method comprises, adjusting an electromechanical actuator to actuate cylinder valve deactivation/activation mechanisms. The actuator is operated at multiple levels based on engine operating conditions. | 06-12-2014 |
20140162838 | METHOD AND SYSTEM FOR ADJUSTING HYBRID VEHICLE DRIVELINE TORQUE - Methods and systems for improving operation of a hybrid vehicle are presented. In one example, an engine torque estimate may be adapted in response to a torque converter impeller speed error. The methods and systems may reduce the possibility of driveline torque disturbances. | 06-12-2014 |
20140163787 | METHOD AND SYSTEM FOR ADAPTING OPERATION OF A HYBRID VEHICLE TRANSMISSION TORQUE CONVERTER LOCKUP CLUTCH - A method and a system for improving operation of a hybrid vehicle are presented. In one example, operation of a transmission torque converter lockup clutch is adjusted to improve engine starting control. The approach may improve engine starting and vehicle drivability. | 06-12-2014 |
20140163788 | METHOD AND SYSTEM FOR IMPROVING HYBRID VEHICLE SHIFTING - A method and a system for improving operation of a hybrid vehicle are presented. In one example, torque converter impeller torque from beginning to end of transmission shifting is adjusted in response to variable driveline inertia. The approach may improve transmission shifting and reduce driveline torque disturbances. | 06-12-2014 |
20140200789 | DRIVER FEEDBACK FOR VEHICLE OPERATION - The following description relates to systems and methods for adjusting vehicle response parameters in response to indications of vehicle operator preferences. In one example approach, a method comprises, during a cruise control mode of operation, adjusting a vehicle response parameter from a default set-point based on an indication of vehicle operator preference. | 07-17-2014 |
20140200794 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 07-17-2014 |
20140222273 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 08-07-2014 |
20140243152 | METHOD FOR CONTROLLING A VEHICLE - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, the method adjusts application of vehicle brakes to reduce the possibility of impact between gear teeth after engine starting. | 08-28-2014 |
20140244143 | Method and Apparatus for Automatic Estimated Time of Arrival Calculation and Provision - A system includes a processor configured to receive information relating to a vehicle location. The processor is also configured to determine one or more filters, based on the received information, for filtering out a plurality of non-specified locations from varied location types. Further, the processor is configured to apply filters for each varied location type to select a plurality of non-specified locations. The processor is also configured to calculate an estimated time of arrival (ETA), for each of the selected locations, and deliver the selected locations and the calculated ETAs to a vehicle. | 08-28-2014 |
20140277875 | HYBRID ELECTRIC VEHICLE DRIVELINE ACTIVE DAMPING AND TRANSIENT SMOOTHNESS CONTROL - A method and system for controlling a hybrid electric vehicle include controlling torque in a traction motor in response to a provisional motor torque that has been adjusted based on a difference between a measured traction motor speed and a calculated vehicle speed and filtered to attenuate a resonant driveline frequency. | 09-18-2014 |
20140278018 | METHOD AND SYSTEM FOR IMPROVING ENGINE STARTING - A method and a system for improving operation of an automatically started engine are described. In one example, slip of a disconnect clutch is adjusted to limit an amount of engine torque transferred to vehicle wheels. The method and system adjust disconnect clutch slip in response to transmission input shaft speed and/or engine combustion events. | 09-18-2014 |
20140297161 | METHODS AND SYSTEM FOR IMPROVING VEHICLE OPERATION - A method and system improving vehicle operation is presented. In one example, the vehicle data is transmitted between a vehicle and a cloud computer. The cloud computer adjusts engine control parameters and the vehicle is operated based on the adjusted engine control parameters. | 10-02-2014 |
20140303873 | POSITION DETECTION FOR LOBE SWITCHING CAMSHAFT SYSTEM - Systems and methods for determining an active cam profile from a plurality of cam profiles is disclosed. The systems and methods may be used to determine how to operate an engine torque actuator or provide an indication of cam profile switching degradation. | 10-09-2014 |
20140309080 | METHOD AND SYSTEM FOR CONTROLLING CATALYST TEMPERATURE - A method and a system for improving operation of a hybrid vehicle are presented. In one example, an engine exhaust after treatment device is cooled at an opportunistic time. The approach may provide improved cooling for exhaust after treatment devices and it may also improve vehicle emissions. | 10-16-2014 |
20140316673 | SYSTEM AND METHOD FOR PROVIDING SPARK TO AN ENGINE - An approach for supplying spark to engine cylinders is disclosed. In one example, the approach increases ignition energy supplied to spark plugs of deactivated cylinders to reduce the possibility of spark plug fouling for the deactivated cylinders. | 10-23-2014 |
20140323266 | METHODS AND SYSTEMS FOR ADJUSTING DRIVELINE OPERATION DURING AN ACCELERATOR TIP-OUT - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine may be operated at an idle speed while a driveline disconnect clutch separating the engine from a driveline is open in response to a reduction in driver demand torque. Engine torque may be applied to the driveline by simply closing the driveline disconnect clutch. | 10-30-2014 |
20140323267 | METHODS AND SYSTEMS FOR DRIVELINE SAILING MODE ENTRY - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, entry conditions for entering a driveline sailing mode are described. Driveline sailing mode may improve driveline torque response and vehicle drivability. | 10-30-2014 |
20140331975 | SYSTEM AND METHOD FOR OPERATING A DIRECT INJECTION FUEL PUMP - Methods and systems are provided for a direct injection fuel pump. The methods and systems selectively operate the direct injection fuel pump with varying levels of efficiency. | 11-13-2014 |
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 |
20140360179 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360180 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360181 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360182 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360183 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360184 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360185 | METHOD AND SYSTEM FOR BINARY FLOW TURBINE CONTROL - Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control. | 12-11-2014 |
20140360477 | SYSTEM AND METHOD FOR DETERMINING VALVE OPERATION - Systems and methods for determining operation of a cylinder deactivating/reactivating device are disclosed. In one example, degradation of the cylinder deactivating/reactivating device is based on intake manifold oxygen concentration. | 12-11-2014 |
20140365085 | SKIP-SHIFT OPERATIONS FOR AUTOMATIC TRANSMISSION SYSTEMS - Method and system providing manual skip-shift for operating the automatic transmission of a vehicle. The method includes accepting the input of gear states by operating a selector mechanism to select a value. The system accepts input of a selected sequence of gear states from a plurality of available gear states, the selected sequence including fewer gear states than the number of available gear states. The system then operates a selector mechanism to select the gear state from the selected sequence. The system also includes an electronic control module, a selector mechanism, and a power train control module. | 12-11-2014 |
20150025723 | METHODS AND SYSTEMS FOR OPERATING AN ENGINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, engine operation is adjusted in response to a change in engine operating conditions that result in a fractional amount of cylinder charge comprised of exhaust gas changing by more than a threshold percentage. The approaches describe may improve vehicle drivability and fuel economy. | 01-22-2015 |
20150025724 | METHODS AND SYSTEMS FOR RESTARTING AN ENGINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, torque output of a motor is controlled to include a reserve torque for starting an engine that may be selectively coupled to the motor. Additionally, the motor torque compensates for disconnect clutch closing. | 01-22-2015 |
20150027107 | NOX CONTROL DURING ENGINE IDLE-STOP OPERATIONS - Methods and systems are provided for improving engine exhaust emissions while enabling exhaust catalyst regeneration following an engine lean event. Prior to a VDE event, or prior to an engine idle-stop, ammonia is produced and stored on an exhaust underbody SCR catalyst. Then, during the engine restart after the VDE mode or the idle-stop, the stored ammonia is used to treat exhaust NOx species while an upstream exhaust underbody three-way catalyst is regenerated. | 01-29-2015 |
20150038294 | METHOD FOR CONTROLLING A TRANSMISSION COUPLED TO AN ENGINE THAT MAY BE AUTOMATICALLY STOPPED - Methods and systems for controlling a transmission coupled to an engine during an engine start are presented. In one example, a method adjusts a transmission tie-up force in response to an indication of transmission slip. The method may improve vehicle launch for stop/start vehicles. | 02-05-2015 |
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 |
20150051045 | METHODS AND SYSTEMS FOR VEHICLE DRIVELINE TORQUE ESTIMATION - Systems and methods for improving hybrid vehicle torque control are presented. The system and methods included may estimate driveline torque via springs of a dual mass flywheel. The estimated driveline torque may provide feedback for adjusting operation of a driveline disconnect clutch and/or engine torque. | 02-19-2015 |
20150052911 | METHOD FOR TRANSITIONING BETWEEN VEHICLE CLIMATE CONTROL SYSTEM MODES - A method for controlling transitions between activating and deactivating a vehicle air conditioner compressor is disclosed. In one example, displacement of the air conditioner compressor is adjusted before the air conditioner is coupled to an energy conversion device. The method may provide smooth transitions between different air conditioner compressor control modes. | 02-26-2015 |
20150065298 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline disconnect clutch operation is adjusted in response to vehicle mass so that the vehicle may operate similarly at lower and higher vehicle masses. | 03-05-2015 |
20150066316 | METHODS AND SYSTEMS FOR OPERATING A TRANSMISSION - Systems and methods for operating and interfacing to a transmission of a vehicle are presented. In one example, a human machine interface allows a driver to assign gear ratios or simulated gear ratios to gear position slots of a shifter. The assignment of gear ratios to gear position slots of a shifter may allow a driver to experience the feeling of driving a manually shifted transmission without having to operate a clutch. | 03-05-2015 |
20150072832 | METHODS AND SYSTEMS FOR OPERATING A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is accelerated to a speed of a driveline integrated starter/generator before the engine is coupled to the driveline integrated starter/generator. | 03-12-2015 |
20150073644 | METHODS AND SYSTEMS FOR PROVIDING UNIFORM DRIVELINE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, negative torque of an electric machine is adjusted to mimic negative torque of an engine during engine braking so that the vehicle may transition from regenerative braking to engine braking in a seamless manner. | 03-12-2015 |
20150081154 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE CONTROL DURING VARYING DRIVING CONDITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operating modes may be adjusted in response to driving surface conditions. The approaches may improve vehicle drivability and reduce driveline degradation. | 03-19-2015 |