Abstract: A method for managing power in a hybrid electric vehicle powertrain having multiple components including at least two of a group comprising an engine, a motor, a generator and a high voltage battery includes computing power losses for the individual components. An engine operating speed and torque for a given vehicle speed and total power command is determined so that total power losses for powertrain components are minimized.

Abstract: A method for managing power in a hybrid electric vehicle powertrain having multiple components including at least two of a group comprising an engine, a motor, a generator and a high voltage battery includes computing power losses for the individual components. An engine operating speed and torque for a given vehicle speed and total power command is determined so that total power losses for powertrain components are minimized.

Abstract: A method is disclosed for managing power in a hybrid electric vehicle powertrain having multiple components, including at least two of a group comprising an engine, a motor, a generator and a high voltage battery. Power losses in the individual components are computed. An engine operating speed and torque for a given vehicle speed and total power command is determined so that total power losses for powertrain components are minimized.

Abstract: A method is disclosed for managing power in a hybrid electric vehicle powertrain having multiple components, including at least two of a group comprising an engine, a motor, a generator and a high voltage battery. Power losses in the individual components are computed. An engine operating speed and torque for a given vehicle speed and total power command is determined so that total power losses for powertrain components are minimized.

Abstract: A method is disclosed for managing power in a hybrid electric vehicle powertrain having multiple components, including an engine, a motor, a generator and a high voltage battery. Power losses in the individual components are computed. An engine speed corresponding to a minimum value for the power losses is selected to achieve optimal total powertrain efficiency.

Abstract: A hybrid-electric powertrain and control method for a vehicle having forward traction wheels and rearward traction wheels in an all-wheel drive configuration. An engine and an electric motor deliver power through delivery paths to the traction wheels. The power delivery paths may have multiple ratio gearing so that more power can be delivered mechanically to improve powertrain performance and to allow the electric motor size to be reduced. The powertrain may include a controller for automatically balancing power distribution to the forward and rearward traction wheels to avoid wheel slip.

Abstract: A hybrid electric vehicle powertrain having an engine and an electric motor and generator sub-system, which establish mechanical and electric power flow paths. Multiple-ratio gearing in a power flow path for forward drive enhances vehicle traction torque for heavy-duty vehicle applications. Reverse drive performance is enhanced by torque multiplying gearing in a reverse drive power delivery path.

Abstract: A method is disclosed for managing power in a hybrid electric vehicle powertrain having multiple components, including an engine, a motor, a generator and a high voltage battery. Power losses in the individual components are computed. An engine speed corresponding to a minimum value for the power losses is selected to achieve optimal total powertrain efficiency.

Abstract: A method is disclosed for managing power in a hybrid electric vehicle powertrain having multiple components, including an engine, a motor, a generator and a high voltage battery. Power losses in the individual components are computed. An engine speed corresponding to a minimum value for the power losses is selected to achieve optimal total powertrain efficiency.

Abstract: A hybrid-electric powertrain and control method for a vehicle having forward traction wheels and rearward traction wheels in an all-wheel drive configuration. An engine and an electric motor deliver power through delivery paths to the traction wheels. The power delivery paths may have multiple ratio gearing so that more power can be delivered mechanically to improve powertrain performance and to allow the electric motor size to be reduced. The powertrain may include a controller for automatically balancing power distribution to the forward and rearward traction wheels to avoid wheel slip.

Abstract: A hybrid-electric powertrain and control method for a vehicle having forward traction wheels and rearward traction wheels in an all-wheel drive configuration. An engine and an electric motor deliver power through delivery paths to the traction wheels. The power delivery paths may have multiple ratio gearing so that more power can be delivered mechanically to improve powertrain performance and to allow the electric motor size to be reduced. The powertrain may include a controller for automatically balancing power distribution to the forward and rearward traction wheels to avoid wheel slip.

Abstract: A hybrid electric vehicle powertrain having an engine and an electric motor and generator sub-system, which establish mechanical and electric power flow paths. Multiple-ratio gearing in a power flow path for forward drive enhances vehicle traction torque for heavy-duty vehicle applications. Reverse drive performance is enhanced by torque multiplying gearing in a reverse drive power delivery path.

Abstract: A geared, power transmission mechanism for a hybrid electric vehicle wherein multiple power flow paths are established between an engine and vehicle traction wheels and between an electric motor and the vehicle traction wheels. A vibration damper assembly, including damper springs and motor inertia mass, is located at the torque output side of the electric motor, whereby inertia torsional vibrations are attenuated.

Abstract: A method is disclosed for managing power in a hybrid electric vehicle powertrain having multiple components, including an engine, a motor, a generator and a high voltage battery. Power losses in the individual components are computed. An engine speed corresponding to a minimum value for the power losses is selected to achieve optimal total powertrain efficiency.

Abstract: A hybrid-electric powertrain for a vehicle having forward traction wheels and rearward traction wheels in an all-wheel drive configuration. An engine and an electric motor deliver power through delivery paths to the traction wheels. The power delivery paths may have multiple ratio gearing so that more power can be delivered mechanically to improve powertrain performance and to allow the electric motor size to be reduced. The powertrain may include a controller for automatically balancing power distribution to the forward and rearward traction wheels to avoid wheel slip.

Abstract: A geared, power transmission mechanism for a hybrid electric vehicle wherein multiple power flow paths are established between an engine and vehicle traction wheels and between an electric motor and the vehicle traction wheels. At least one of the power flow paths is characterized by at least two ratios.

Abstract: A geared, power transmission mechanism for a hybrid electric vehicle wherein multiple power flow paths are established between an engine and vehicle traction wheels and between an electric motor and the vehicle traction wheels. At least one of the power flow paths is characterized by at least two ratios.

Abstract: A hybrid-electric powertrain and control method for a vehicle having forward traction wheels and rearward traction wheels in an all-wheel drive configuration. An engine and an electric motor deliver power through delivery paths to the traction wheels. The power delivery paths may have multiple ratio gearing so that more power can be delivered mechanically to improve powertrain performance and to allow the electric motor size to be reduced. The powertrain may include a controller for automatically balancing power distribution to the forward and rearward traction wheels to avoid wheel slip.

Abstract: A geared, power transmission mechanism for a hybrid electric vehicle wherein multiple power flow paths are established between an engine and vehicle traction wheels and between an electric motor and the vehicle traction wheels. At least one of the power flow paths is characterized by at least two ratios.

Abstract: A hybrid-electric powertrain for a vehicle having forward traction wheels and rearward traction wheels in an all-wheel drive configuration. An engine and an electric motor deliver power through delivery paths to the traction wheels. The power delivery paths may have multiple ratio gearing so that more power can be delivered mechanically to improve powertrain performance and to allow the electric motor size to be reduced. The powertrain may include a controller for automatically balancing power distribution to the forward and rearward traction wheels to avoid wheel slip.