Patent ID: 6441506
Filing Date: 2002-08-27
Classification: B60K,B60L,B60W,Y02T,Y10S

Abstract:
A parallel hybrid vehicle employing a parallel hybrid system, using both an internal combustion engine and an electric motor generator for propulsion, said parallel hybrid vehicle comprising:a torque composition mechanism which combines a torque output produced by the engine and a torque output produced by the motor generator to generate a combined torque, and which is connected via a transmission in a powertrain to drive wheels to output the combined torque via the transmission to the drive wheels; a direct-coupling clutch which directly couples the engine with the motor generator; an engine-speed sensor which detects engine speed of the engine; a throttle opening sensor which detects a throttle opening of a throttle valve; a controller being connected electrically to the motor generator and the direct-coupling clutch for controlling the torque output produced by the motor generator and engagement and disengagement of the direct-coupling clutch, said controller allowing the direct-coupling clutch to operate in a disengaged state and allowing the engine speed to be maintained at a predetermined value during starting of the vehicle; said controller comprising: (a) a desired motor/generator torque setting section which sets a desired motor/generator torque on the basis of both the engine speed and the throttle opening from a predetermined characteristic map to generate a signal indicative of the desired motor/generator torque, and (b) a response-characteristic compensation section which attenuates high-input-frequency components and passes low-input-frequency components, out of the signal indicative of the desired motor/generator torque set through the desired motor/generator torque setting section, to generate a compensated signal; and said controller controlling the torque output of the motor generator on the basis of a signal value of the compensated signal generated by the response-characteristic compensation section.