Patent application number | Description | Published |
20100279816 | Transmission Engagement Control During an Engine Restart of a Hybrid Electric Vehicle - A method for controlling transmission engagement during restart of an engine in a hybrid electric powertrain includes moving a gear lever between a forward position and reverse position, using electric power to drive an auxiliary pump whose output causes a transmission to engage a gear that corresponds to the lever position and to stroke, to zero torque capacity, an oncoming clutch that corresponds to said gear, initiating the restart, and discontinuing use of the auxiliary pump. | 11-04-2010 |
20100279818 | Control of a Dry, Dual-Clutch Transmission During an Engine Restart of a Hybrid Electric Vehicle - A method for controlling an engine restart in a hybrid electric powertrain, including the steps of stopping the engine, using an electric power source and an electro-mechanical actuator connected to the source to engage a gear and stroke to zero torque capacity a dry clutch of a dual-clutch transmission, initiating an automatic engine restart, and increasing the torque capacity of the clutch to a desired torque capacity during the engine restart. | 11-04-2010 |
20100304926 | Transmission Clutch Stroking Control During an Engine Restart In a Hybrid Electric Vehicle - A method for controlling restart of an engine in a hybrid electric powertrain includes stopping the vehicle and engine, initiating the restart, estimating time required to restart the engine after the restart is initiated, filling and stroking launch elements of a transmission, when the estimated time substantially equals a second estimated time required to fill and stroke said launch elements, and increasing the torque capacity of the launch elements to accelerate the vehicle. | 12-02-2010 |
20100305790 | Wheel Torque Disturbance Suppression - A method for controlling restart of an engine in a hybrid electric powertrain, includes engaging a gear of a transmission, releasing a brake pedal, maintaining fluid pressure at an adaptively determined magnitude in a wheel brake, initiating a restart the engine, and reducing fluid pressure in the wheel brake when the engine restarts. | 12-02-2010 |
20100305820 | Engine Speed Reduction Preparatory to an Engine Restart - A method for restarting an engine of a vehicle includes stopping the vehicle and holding the vehicle stationary, reducing engine speed, increasing a rate of reduction of engine speed, if engine speed is less than a reference speed when a desired restart of the engine is indicated, and initiating an engine restart when engine speed is substantially zero. | 12-02-2010 |
20110009235 | Hybrid Electric Vehicle Powertrain Control After a Requested Change in Vehicle Direction - A method for controlling a hybrid electric vehicle powertrain includes operating an engine driveably connected to first vehicle wheels, providing an electric motor driveably connected to second vehicle wheels, shifting a gear selector between a forward drive position and a reverse drive position, reducing vehicle speed to or lower than a reference speed, and using a transmission located between the engine and the first wheels and the electric motor to produce reverse or forward drive corresponding to the position to which the gear selector is shifted. | 01-13-2011 |
20110065548 | Brake Assisted Vehicle Engine Restart on a Road Grade - A method for restarting an engine of a vehicle stopped on a grade, comprising the steps of engaging a gear of a transmission through which the engine and wheels of the vehicle are driveably connected mutually, using brake pressure to engage wheel brakes and produce a road gradient wheel torque that holds the vehicle stationary on the grade, initiating an engine restart, operating the engine to produce wheel torque equal to or greater than the road gradient wheel torque, and releasing the brake pressure. | 03-17-2011 |
20110070999 | Control of an Engine Restart in a Hybrid Electric Vehicle - A method for restarting an engine in a hybrid electric powertrain includes using an auxiliary pump while the engine is shutdown to maintain stroke pressure in an oncoming transmission friction control element whose engagement is required to launch the vehicle following the restart, initiating an automatic engine restart, increasing a torque capacity of the control element while the engine is restarting, and using pressure produced by a transmission pump in the transmission to lock the control element after the engine restarts. | 03-24-2011 |
20120010041 | Transitioning Between Electric-Drive and Parallel-Drive in a Hybrid-Electric Vehicle Powertrain - A method for operating a vehicle powertrain includes driving first wheels using an electric machine, starting an engine, using a second electric machine driven by the engine to produce synchronous speed at a input of a transmission having a desired gear engaged, engaging a clutch that connects said input and the engine, and using the engine and the transmission to drive second wheels. | 01-12-2012 |
20120022731 | Series-Drive Operation During Launch and Creep of a Hybrid Electric Vehicle - A method for launching a vehicle includes determining that vehicle speed is less than a reference, demanded wheel power is less than a reference wheel power, and demanded engine power is less than a reference engine power; charging a battery using a generator driven by an engine; using an electric machine powered by the battery to drive vehicle wheels; and opening a clutch located in a drive path between a transmission and the generator. | 01-26-2012 |