Abstract: A control method and system for a hybrid vehicle powertrain with an electric motor in a power flow path between an internal combustion engine and a multiple-ratio geared transmission. Motor torque, which is added to engine torque to obtain an effective transmission input torque, is modulated to achieve smooth power-on upshifts and coasting downshifts.

Abstract: A control method and system for a hybrid vehicle powertrain with an electric motor in a power flow path between an internal combustion engine and a multiple-ratio geared transmission. Motor torque, which is added to engine torque to obtain an effective transmission input torque, is modulated to achieve smooth power-on upshifts and coasting downshifts.

Abstract: A control method and system for a hybrid vehicle powertrain with an electric motor in a power flow path between an internal combustion engine and a multiple-ratio geared transmission. Motor torque, which is added to engine torque to obtain an effective transmission input torque, is modulated to achieve smooth power-on upshifts and coasting downshifts.

Abstract: A method for controlling engagement and release of friction clutches in a multiple-ratio transmission for a hybrid electric vehicle powertrain uses electric motor torque to augment engine torque as a power-on downshift is commanded. Near the end of a downshift event, total powertrain torque is modulated or reduced to reduce torque disturbances.

Abstract: A method for controlling engagement and release of friction clutches in a multiple-ratio transmission for a hybrid electric vehicle powertrain uses electric motor torque to augment engine torque as a power-on downshift is commanded. Near the end of a downshift event, total powertrain torque is modulated or reduced to reduce torque disturbances.

Abstract: A powertrain assembly for an automotive vehicle having an internal combustion engine, transmission, electric induction motor, a clutch for connecting and releasing the engine and transmission, and a controller for controlling the state of engagement and disengagement of the clutch and the torque produced by the motor during the launch. The engine increases torque produced by the induction motor during a vehicle launch condition, permitting the engine to be turned off when the vehicle is at rest. The torque multiplication that would normally be available from a hydrokinetic torque converter is replaced with auxiliary launch torque supplied by the induction motor.

Abstract: A powertrain assembly for an automotive vehicle having an internal combustion engine, transmission, electric induction motor, a clutch for connecting and releasing the engine and transmission, and a controller for controlling the state of engagement and disengagement of the clutch and the torque produced by the motor during the launch. The engine increases torque produced by the induction motor during a vehicle launch condition, permitting the engine to be turned off when the vehicle is at rest. The torque multiplication that would normally be available from a hydrokinetic torque converter is replaced with auxiliary launch torque supplied by the induction motor.

Abstract: A control method and system for a hybrid vehicle powertrain with an electric motor in a power flow path between an internal combustion engine and a multiple-ratio geared transmission. Motor torque, which is added to engine torque to obtain an effective transmission input torque, is modulated to achieve smooth power-on upshifts and coasting downshifts.