Patent application number | Description | Published |
20080262695 | Engine mode transition utilizing dynamic torque control - A method of operating an engine having a plurality of cylinders, the method comprising of transitioning the engine from a first mode to a second mode, and temporarily adjusting an amount of torque produced by a cylinder of the engine for at least one cycle responsive to a difference in an amount of torque produced by a previous firing cylinder and a subsequent firing cylinder. | 10-23-2008 |
20080287253 | Variable Displacement Engine Powertrain Fuel Economy Mode - A vehicle drive system comprising of a variable displacement engine including a plurality of cylinders, where at least one of the plurality of cylinders selectively deactivates to decrease engine displacement; a torque converter operatively coupled to the variable displacement engine configured to operate with variable slip; a driver interface for receiving a preference setting from a driver; a control system for receiving the driver preference setting, and adjusting torque converter slip based on the driver preference setting. | 11-20-2008 |
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 |
20090093939 | Valve Control Synchronization and Error Detection in an Electronic Valve Actuation Engine System - A system for controlling a multiple cylinder internal combustion engine with electromagnetic valve actuation, comprising of at least one cylinder with an engine cylinder valve, a second controller operably coupled to the engine cylinder valve, said second controller configured to adjust at least one of the valve opening and closing timing of the engine cylinder valve, and a first controller connected with the second controller over a first link and a second link, wherein the first controller is configured to send an engine position indication signal to the second controller over the first link and receive a status signal from the second controller over the second link, and wherein the first controller outputs a synchronization degradation signal responsive to a synchronization error between the engine position indication signal and the status signal. | 04-09-2009 |
20090241872 | Temperature Sensing Coordination with Engine Valve Timing Using Electric Valve Actuator - A method of operation for an engine including an electrically actuated engine valve in a cylinder head, with at least an actuator coupled to the valve, the method including applying a potential to generate a current indicative of temperature in the actuator at least partially during a substantially non-moving condition of the actuator and adjusting a timing of the application of the potential based on valve location in the cylinder head. | 10-01-2009 |
20100114461 | ENGINE SHUTDOWN CONTROL - Methods and systems are provided for controlling engine shutdown in a vehicle. One example method includes, after discontinuation of combustion and during engine spin down, reducing cylinder air charge while maintaining intake manifold pressure above a threshold value. | 05-06-2010 |
20100114462 | CONTROL OF INTAKE PRESSURE FOR RESTART-ENABLED IDLE STOP - Methods and systems are provided for controlling an engine of a vehicle, the engine including an intake manifold, a cylinder, and an adjustable throttle upstream of the intake manifold. One example method includes operating the engine with combustion, and in response to operating conditions, during a stopped vehicle idle condition, and without a shut-down request by the operator, automatically initiating an engine shut down. Further, the example method may include during the automatically initiated engine shut down, adjusting the throttle to maintain manifold pressure at a first value, where during progression of the shut down, the first value is adjusted based on an operating parameter and restarting the engine before it reaches zero speed in response to a restart request. | 05-06-2010 |
20100174459 | METHODS AND SYSTEMS FOR ENGINE SHUT-DOWN CONTROL - Methods and systems are provided for controlling a powertrain of a vehicle, the powertrain including an engine and an automatic transmission, the powertrain coupled to driving wheels of the vehicle, and the vehicle operated by an operator. One example method comprises, selectively shutting down engine operation responsive to operating conditions and without receiving an engine shutdown request from the operator, maintaining the automatic transmission in gear during the shutdown, and during an engine restart from the shutdown condition, and with the transmission in gear, transmitting reduced torque to the transmission. | 07-08-2010 |
20100174460 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle system including an engine that is selectively shut-down during engine idle-stop conditions, the vehicle system further including a hydraulically actuated transmission component. One example method comprises, during an idle-stop engine shut-down, adjusting a hydraulic actuation of the transmission component to adjust drag torque on the engine to stop the engine. | 07-08-2010 |
20100174465 | SYSTEM AND METHODS FOR ASSISTED DIRECT START CONTROL - Systems and methods for assisted direct start control are provided. An example method of controlling a system including an engine includes operating in a first mode during a first vehicle grade and during automatic re-starting from an engine stopped condition. The first mode includes starting the engine in a driving gear, and adjusting engine torque responsive to launch behavior. The method may further include operating in a second mode during a second vehicle grade and during automatic re-starting from an engine stopped condition. The second mode includes starting the engine in the driving gear, and adjusting one or more of a transmission forward clutch and wheel brakes responsive to launch behavior. | 07-08-2010 |
20100211288 | METHODS AND SYSTEMS FOR ENGINE STARTING - Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions and selectively reactivated during engine restart conditions. One example method comprises, during an engine restart from an idle stop, performing a first combustion event in a cylinder with a piston at an engine crankshaft position that is after a crankshaft position at which said cylinder's exhaust valve opens, and before a crankshaft position at which the cylinder's intake valve closes, during a cycle of said cylinder. | 08-19-2010 |
20100244459 | METHODS AND SYSTEMS FOR ENGINE START CONTROL - Methods and systems are provided for starting an engine in a vehicle, the engine including a starter, the vehicle including a plurality of energy storage devices electrically coupled to the starter. One example method comprises, during a first charging condition, electrically coupling the plurality of energy storage devices in parallel to each other; and during a second discharging condition, electrically coupling the plurality of energy storage devices in series to each other and to the starter to actuate the starter and rotate the engine. | 09-30-2010 |
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 |
20100300404 | DIRECT-START ENGINE OPERATION UTILIZING MULTI-STRIKE IGNITION - A method for operation of a vehicle having an internal combustion engine is provided. The internal combustion engine may include one or more combustion chambers, a fuel delivery system including a direct fuel injector coupled to each combustion chamber, an ignition system including one or more spark plugs coupled to each combustion chamber, a piston disposed within each combustion chamber, and an intake and an exhaust valve coupled to each combustion chamber, the internal combustion engine providing motive power to the vehicle. The method may include discontinuing combustion operation within the internal combustion engine responsive to idle-stop operation. The method may further include, during a direct-start, performing multi-strike ignition operation per combustion cycle via one or more selected spark plug(s) for at least a first combustion cycle in a combustion chamber following the discontinuation of combustion operation, the one or more selected spark plug(s) coupled to the combustion chamber. | 12-02-2010 |
20110039657 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Systems and methods are provided for controlling a vehicle system including an engine that is selectively shut-down during engine idle-stop conditions, the system further including a hydraulic circuit comprising a hydraulically actuated transmission component, an accumulator, and an auxiliary transmission fluid pump. One example method comprises, during a first idle-stop engine shut-down condition, where the accumulator pressure is above a threshold, delivering pressurized transmission fluid to the hydraulic circuit from the accumulator, while disabling the auxiliary pump. The method further comprises, during a second idle-stop engine shut-down condition, where the accumulator pressure is below the threshold, operating the auxiliary pump and delivering at least some pressurized transmission fluid to the hydraulic circuit from the operating pump without travelling through the accumulator. | 02-17-2011 |
20110041801 | DIRECT-START ENGINE OPERATION UTLIZING MULTI-STRIKE IGNITION - A method for engine starting is provided. The method may include performing idle-stop operation, and during a subsequent re-start, applying multi-strike ignition operation for a first combustion cycle. In this way, improved engine starting may be achieved with reduced emissions. | 02-24-2011 |
20110130245 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle system including a selectively shut-down engine, a torque converter and a torque converter lock-up clutch. One example method comprises, during an idle-stop engine shut-down, restricting flow of transmission fluid out of the torque converter, and adjusting engagement of the torque converter lock-up clutch to adjust a drag torque on the engine to stop the engine. | 06-02-2011 |
20110132307 | 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 disengages a starter in response to a first predicted combustion in a cylinder of the engine. The method may reduce one-way clutch degradation of a starter. Further, the method may reduce current consumption during engine starting. | 06-09-2011 |
20110132308 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions. One example method includes, during a first condition, engaging an engine starter, without applying a starter current, to the deactivated rotating engine after the engine speed drops below a threshold speed. The method further includes, during a second condition, engaging the starter and adjusting a starter motor switch to apply a starter braking torque to the rotating engine. | 06-09-2011 |
20110135498 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for pressurizing a transmission hydraulic circuit including a transmission mechanical pump coupled to an engine though a gearbox. One example method comprises, during an engine start, adjusting a speed ratio between the transmission pump and the engine between a first speed ratio and a second speed ratio, the pump rotating faster relative to the engine at the first speed ratio as compared with the second speed ratio. | 06-09-2011 |
20110136620 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle engine coupled to a stepped-gear-ratio transmission. One example method comprises, in response to a first vehicle moving condition, shutting down the engine and at least partially disengaging the transmission while the vehicle is moving; and during a subsequent restart, while the vehicle is moving, starting the engine using starter motor assistance and adjusting a degree of engagement of a transmission clutch to adjust a torque transmitted to a wheel of the vehicle. | 06-09-2011 |
20110136621 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for reducing driveline unwinding during successive engine shutdown and restart operations. In one example, during an engine shutdown, torsion is maintained in a transmission gear-train until an engine restart is requested by engaging one or more transmission clutches while applying wheel brakes. | 06-09-2011 |
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 |
20110202262 | 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 skips combustion in at least one cylinder, according to the engine combustion order, to control engine speed when an engine is automatically restarted. The skipped combustion event may be related to a level of IMEP when combustion in a cylinder occurs under an operating condition. | 08-18-2011 |
20110232596 | 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 disengages a starter in response to a first predicted combustion in a cylinder of the engine. The method may reduce one-way clutch degradation of a starter. Further, the method may reduce current consumption during engine starting. | 09-29-2011 |
20120010044 | METHOD FOR CONTROLLING AN ENGINE THAT MAY BE AUTOMATICALLY STOPPED - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method adjusts a transmission tie-up force in response to engine starting. The method may improve vehicle launch for stop/start vehicles. | 01-12-2012 |
20120010045 | 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 adjusts a transmission actuator in response to engine combustion during an engine start. The method may improve vehicle launch for stop/start vehicles. | 01-12-2012 |
20120010792 | METHODS AND SYSTEMS FOR ENGINE CONTROL - Systems and methods are provided for restarting an engine that can be selectively deactivated during idle-stop conditions. In one embodiment, the engine is restarted with torque reduction over an interval of the restart, for example, by upshifting the transmission. In response to a vehicle launch request, the torque reduction is decreased, for example, by downshifting the transmission, to expedite return of driveline torque. | 01-12-2012 |
20120024259 | DIRECT-START ENGINE OPERATION UTILIZING MULTI-STRIKE IGNITION - A method for engine starting is provided. The method may include performing idle-stop operation, and during a subsequent re-start, applying multi-strike ignition operation for a first combustion cycle. In this way, improved engine starting may be achieved with reduced emissions. | 02-02-2012 |
20120104767 | METHODS AND SYSTEMS FOR ENGINE STARTING - A system for improving engine starting is disclosed. In one example, an engine starting is improved by providing a predictable load to the engine during engine starting. The predictable load may be provided by controlling alternator field voltage during the engine start. | 05-03-2012 |
20120104768 | METHODS AND SYSTEMS FOR IMPROVED ENGINE SPEED CONTROL DURING ENGINE STARTING - A system for improving engine starting is disclosed. In one example, an engine starting is improved by providing a variable load to the engine during engine starting. The variable load may be provided by controlling alternator field current during the engine start. | 05-03-2012 |
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 |
20120172175 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for reducing audible clunks and objectionable drive feel in vehicles including start/stop systems. In one example, a vehicle engine is shutdown during vehicle coasting. The vehicle engine is then restarted, while the vehicle is moving with a torque converter clutch disengaged. A transmission clutch pressure is then adjusted during the restart based on a torque converter output speed relative to a torque converter input speed. | 07-05-2012 |
20120185158 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions. One example method includes, during a first condition, engaging an engine starter, without applying a starter current, to the deactivated rotating engine after the engine speed drops below a threshold speed. The method further includes, during a second condition, engaging the starter and adjusting a starter motor switch to apply a starter braking torque to the rotating engine. | 07-19-2012 |
20120200262 | METHODS AND SYSTEMS FOR ENGINE START CONTROL - Methods and systems are provided for starting an engine in a vehicle. In one example, two or more energy storage devices are coupled in series to improve engine starting. The method and system may reduce engine starting time. | 08-09-2012 |
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 |
20120238405 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle engine coupled to a stepped-gear-ratio transmission. One example method comprises, in response to a first vehicle moving condition, shutting down the engine and at least partially disengaging the transmission while the vehicle is moving; and during a subsequent restart, while the vehicle is moving, starting the engine using starter motor assistance and adjusting a degree of engagement of a transmission clutch to adjust a torque transmitted to a wheel of the vehicle. | 09-20-2012 |
20120245831 | 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 disengages a starter in response to a first predicted combustion in a cylinder of the engine. The method may reduce one-way clutch degradation of a starter. Further, the method may reduce current consumption during engine starting. | 09-27-2012 |
20120264567 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for pressurizing a transmission hydraulic circuit including a transmission mechanical pump coupled to an engine though a gearbox. One example method comprises, during an engine start, adjusting a speed ratio between the transmission pump and the engine between a first speed ratio and a second speed ratio, the pump rotating faster relative to the engine at the first speed ratio as compared with the second speed ratio. In this way, the pump may be driven at different speed ratios relative to the engine to provide better pressurization in the transmission. | 10-18-2012 |
20120330522 | METHOD AND SYSTEM FOR ENGINE CONTROL - Systems and methods are provided for restarting an engine that can be selectively deactivated during idle-stop conditions. In one embodiment, current is directed to a starter motor and an electric brake sequentially by limiting the current supplied to one while current is supplied to the other, an order of delivering the current based on a timing of a restart request relative to an electric brake request, as well as vehicle operating conditions at the time the requests were received. By coordinating the operation of a starter motor with the operation of an electric brake, overloading of the engine system's electrical supply can be reduced. | 12-27-2012 |
20130001006 | Method for Supplying Power to an Electrically Assisted Steering System - A method for supplying power to an electrically assisted steering system is described. In one example, the method adjusts alternator field current to increase energy supplied to the electrically assisted steering system in response to an automatic engine stop request. The method may improve operation of the electrically assisted steering system. | 01-03-2013 |
20130002210 | Method for Controlling Vehicle Launch - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method adjusts a transmission actuator in response to engine combustion during an engine start. The method may improve vehicle launch for stop/start vehicles. | 01-03-2013 |
20130005532 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque. | 01-03-2013 |
20130085035 | METHOD FOR CONTROLLING AN ENGINE THAT MAY BE AUTOMATICALLY STOPPED - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method adjusts a transmission tie-up force in response to engine starting. The method may improve vehicle launch for stop/start vehicles. | 04-04-2013 |
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 |
20130124067 | METHODS AND SYSTEMS FOR ENGINE STARTING - Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions and selectively reactivated during engine restart conditions. One example method comprises, during an engine restart from an idle stop, performing a first combustion event in a cylinder with a piston at an engine crankshaft position that is after a crankshaft position at which said cylinder's exhaust valve opens, and before a crankshaft position at which the cylinder's intake valve closes, during a cycle of said cylinder. In this way, inaccuracies in cylinder aircharge estimation may be reduced, thereby also reducing air-fuel ratio errors and improving the quality and repeatability of engine restarts. | 05-16-2013 |
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 |
20130199335 | 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 adjusts a transmission actuator in response to engine combustion during an engine start. The method may improve vehicle launch for stop/start vehicles. | 08-08-2013 |
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 |
20130218441 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for restarting an engine when a high pressure fuel pump is degraded. In response to an indication of high pressure fuel pump degradation, fuel may be injected during an intake stroke, rather than a compression stroke, for a selected number of combustion events since the engine restart. By shifting to an intake stroke injection, the engine may be started even when sufficient fuel rail pressures are not available. | 08-22-2013 |
20130238204 | METHOD FOR OPERATING A VEHICLE POWERTRAIN - Methods and systems for controlling a vehicle powertrain that may be automatically stopped and started are presented. In one example, a method adjusts a position of a transmission clutch in response to battery current during engine cranking. The method may reduce clutch wear and improve vehicle launch from a stop. | 09-12-2013 |
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 |
20130281260 | SYSTEM AND METHODS FOR ASSISTED DIRECT START CONTROL - Systems and methods for assisted direct start control are provided. An example method varies engine torque, forward clutch engagement pressure, and wheel brake pressure during a vehicle launch responsive to longitudinal vehicle grade to improve launch performance. | 10-24-2013 |
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 |
20130296124 | METHODS AND SYSTEMS FOR A DRIVELINE DUAL MASS FLYWHEEL - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation is provided for a dual mass flywheel positioned in a vehicle driveline. The approaches may reduce driveline torque disturbances. | 11-07-2013 |
20130296125 | METHODS AND SYSTEMS FOR OPERATING A DRIVELINE CLUTCH - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, operation of a driveline disconnect clutch is adjusted to compensate for clutch wear and manufacturing tolerances. | 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 |
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 |
20130297161 | METHODS AND SYSTEMS FOR HOLDING A VEHICLE STOPPED ON A HILL - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a holding force of a vehicle parked on a hill is adjusted depending on a grade of the hill. | 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 |
20130297191 | METHODS AND SYSTEMS FOR STOPPING AN ENGINE - Systems and methods for improving operation of a stop/start vehicle are presented. In one example, an engine throttle position is adjusted in response to whether or not a starter engages a flywheel during engine stopping. | 11-07-2013 |
20130305709 | Boost Reservoir Control - Methods and systems are provided for reducing turbo lag in a boosted engine. A boost reservoir coupled to the engine may be charged with compressed intake air and/or combusted exhaust gas. The pressurized charge may then be discharged during a tip-in to either the intake or the exhaust manifold. | 11-21-2013 |
20130305716 | BOOST RESERVOIR AND THROTTLE COORDINATION - Methods and systems are provided for reducing turbo lag in a boosted engine. A boost reservoir coupled to the engine may be charged with compressed intake air and/or combusted exhaust gas. The pressurized charge may then be discharged during a tip-in to either the intake or the exhaust manifold. | 11-21-2013 |
20130305718 | STORED COMPRESSED AIR MANAGEMENT FOR IMPROVED ENGINE PERFORMANCE - Methods and systems are provided for raising an exhaust temperature to spin a turbocharger turbine and reduce turbo-lag. Pressurized air is discharged from a boost reservoir into an intake manifold while spark retard is increased to expedite exhaust heating while also increasing a net combustion torque. By expediting turbine spin-up in response to a tip-in, turbo-lag is reduced and engine performance is improved. | 11-21-2013 |
20140011635 | 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 adjusts a transmission actuator in response to engine combustion during an engine start. The method may improve vehicle launch for stop/start vehicles. | 01-09-2014 |
20140035291 | METHODS AND SYSTEMS FOR ENGINE STARTING - A system for improving engine starting is disclosed. In one example, an engine starting is improved by providing a predictable load to the engine during engine starting. The predictable load may be provided by controlling alternator field voltage during the engine start. | 02-06-2014 |
20140045650 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for reducing audible clunks and objectionable drive feel in vehicles including start/stop systems. In one example, a vehicle engine is shutdown during vehicle coasting. The vehicle engine is then restarted, while the vehicle is moving with a torque converter clutch disengaged. A transmission clutch pressure is then adjusted during the restart based on a torque converter output speed relative to a torque converter input speed. | 02-13-2014 |
20140055102 | METHODS AND SYSTEMS FOR IMPROVED ENGINE SPEED CONTROL DURING ENGINE STARTING - A system for improving engine starting is disclosed. In one example, an engine starting is improved by providing a variable load to the engine during engine starting. The variable load may be provided by controlling alternator field current during the engine start. | 02-27-2014 |
20140057754 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle engine coupled to a stepped-gear-ratio transmission. One example method comprises, in response to a first vehicle moving condition, shutting down the engine and at least partially disengaging the transmission while the vehicle is moving; and during a subsequent restart, while the vehicle is moving, starting the engine using starter motor assistance and adjusting a degree of engagement of a transmission clutch to adjust a torque transmitted to a wheel of the vehicle. | 02-27-2014 |
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 |
20140057756 | METHODS AND SYSTEMS FOR ENGINE CONTROL - Systems and methods are provided for restarting an engine that can be selectively deactivated during idle-stop conditions. In one embodiment, the engine is restarted with torque reduction over an interval of the restart, for example, by upshifting the transmission. In response to a vehicle launch request, the torque reduction is decreased, for example, by downshifting the transmission, to expedite return of driveline torque. | 02-27-2014 |
20140080669 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque. | 03-20-2014 |
20140094343 | METHODS AND SYSTEMS FOR ASSISTED DIRECT START CONTROL - Methods and systems are provided for controlling a vehicle system including a selectively shut-down engine, a torque converter and a torque converter lock-up clutch. One example method comprises, during an idle-stop engine shut-down, restricting flow of transmission fluid out of the torque converter, and adjusting engagement of the torque converter lock-up clutch to adjust a drag torque on the engine to stop the engine. | 04-03-2014 |
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 |
20140129083 | Assisted Direct Start And Active Suspension Integration Control - A system for controlling an internal combustion engine. The system includes engine shutdown/restart means and energy storage means configured for supplying power to an associated active vehicle suspension system when the engine is shut down. A controller is configured for controlling the shutdown/restart means responsive to an energy state of the energy storage means. | 05-08-2014 |
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 |
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 |
20140278005 | METHOD FOR IMPROVING ENGINE STARTING - A method and system for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, the method adjusts a port fuel injection amount in response to engine stopping position. The engine stopping position may be indicative of a fraction of injected fuel that enters a cylinder for a first combustion event since engine stop. | 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 |
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 |
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 |
20140336910 | METHOD AND SYSTEM FOR ENGINE STARTING - A method and a system for improving operation of an automatically started engine are described. In one example, engine speed is adjusted to a sole run-up speed and, held at the desired engine run-up speed for a desired period, before being ramped to an idle speed. | 11-13-2014 |
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 |
20140378273 | METHOD AND SYSTEM FOR REDUCING DRIVELINE NVH - A method and a system for reducing driveline speed oscillations related to a driveline resonance frequency are described. Driveline speed oscillations may be reduced via slipping a driveline clutch or adjusting torque of a driveline motor/generator. The method and system may be activated during select vehicle operating conditions. | 12-25-2014 |
20150025780 | METHODS AND SYSTEMS FOR IMPROVING ENGINE STARTING - Systems and methods for restarting an engine are presented. In one example, fuel is injected to cylinder ports before the engine is stopped such that the injected fuel is not inducted into the cylinders before an engine restart is requested. The method may improve fuel vaporization during engine restarting. | 01-22-2015 |
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 |
20150040864 | METHODS AND SYSTEMS FOR IMPROVING ENGINE STARTING - Systems and methods for restarting an engine are presented. In one example, spark timing during engine starting is adjusted in response to engine speed and a second control parameter. The second control parameter may be correlated with crankshaft or rod degradation. Spark may be advanced from minimum spark for best torque when engine speed is greater than desired and when the second control parameter does not provide an indication of engine degradation. | 02-12-2015 |
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 |
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 |
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 |