Patent ID: 7465251
Filing Date: 2008-12-16
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A hybrid electric vehicle comprising: a heat engine outputting power through a engine shaft; a first electric motor, with rotor being fixed to said engine shaft, for outputting torque and for generating electric power; a second electric motor for providing drive and brake torque; a planetary gear unit, for mechanically combining the torque of said engine with the torque of said second motor to drive the vehicle, comprising at least three gear elements which are a first gear element connected to said engine shaft, a second gear element being fixed to a rotor of said second motor, and a third gear element for outputting the torque to drive the vehicle; a case, being stationary to the vehicle, for housing said first motor, said second motor, and said planetary gear unit; and a one-way-clutch, being fixed between said engine shaft and said case, for keeping said engine shaft from rotating backwards; wherein the speed ratio of said engine to the wheels of the vehicle can be changed by changing the speed of said second motor, so said planetary gear unit and the two motors make a transmission of the vehicle.