초록 ▼

A hybrid electric vehicle contains a powerplant for propelling the vehicle. The powerplant comprises a combustion engine (6) and a dynamoelectric machine (8). A control system (10) issues a wheel torque command corresponding to torque desired at road-engaging wheels, and includes an engine controlle

A hybrid electric vehicle contains a powerplant for propelling the vehicle. The powerplant comprises a combustion engine (6) and a dynamoelectric machine (8). A control system (10) issues a wheel torque command corresponding to torque desired at road-engaging wheels, and includes an engine controller (16) for issuing an engine torque command and a dynamoelectric machine controller (18) for issuing a dynamoelectric machine torque command. Controller (18) contains one or more maps and/or profiles defining functional relationship of torque to engine crankshaft speed and/or position over a range of crankshaft speeds and/or positions. The maps and/or profiles are used to develop make-up torque that is delivered by the dynamoelectric machine to accomplish certain smoothing functions. Transmission gear shifts can be smoothed by using the dynamoelectric machine controller to slew the engine to a new target speed appropriate to the new gear. A dedicated, high-speed data communication link supplies crankshaft speed and position information from an engine-mounted sensor directly to controller (18).

대표청구항 ▼

1. A hybrid electric vehicle comprising: a powerplant for propelling the vehicle comprising a combustion engine and a dynamoelectric machine that is arranged for interaction with the combustion engine so as to function, with respect to the engine, at times as a power source for adding torque into a

1. A hybrid electric vehicle comprising: a powerplant for propelling the vehicle comprising a combustion engine and a dynamoelectric machine that is arranged for interaction with the combustion engine so as to function, with respect to the engine, at times as a power source for adding torque into a drivetrain through which the powerplant propels the vehicle, and at times as a power sink for subtracting torque from the drivetrain; a control system comprising a vehicle controller that receives driver input and issues respective outputs to an engine controller for controlling the engine and to a dynamoelectric machine controller for controlling the dynamoelectric machine, respectively; a signal source on the engine providing engine speed data to said dynamoelectric machine controller; the dynamoelectric machine controller comprising a look-up table that contains respective make-up torque values correlated with respective values of engine speed data to smooth out vehicle acceleration and provide better drivability during certain driving condition; and the dynamoelectric machine controller comprising a processor that causes a make-up torque value from the look-up table corresponding to a value of engine speed data received from the signal source, to be included in the torque output of the dynamoelectric machine for interaction with the engine.