Patent ID: 6784563
Filing Date: 2004-08-31
Classification: B60K,B60L,B60W,F02D,F02N,Y02T,Y10S

Abstract:
A hybrid vehicle with an engine, a generator, and a motor mounted thereon, said engine outputting power through combustion of a fuel, said generator generating electric power with at least part of the power output from said engine, said motor outputting power to a drive shaft of said hybrid vehicle, said hybrid vehicle comprising:an engine control unit that feedback controls a quantity of the fuel injected to said engine to attain a specified target revolving speed of said engine; a generative energy computation unit that computes an instantaneous magnitude of generative energy to be generated by said generator by taking into account an energy balance in a system including said engine, said generator, and said motor; a voltage measurement unit that measures a generative voltage of said generator; a control variable computation unit that computes a feedback control variable corresponding to a difference between the observed generative voltage and a target generative voltage of said generator; a generator control unit that feedback controls said generator with the calculated instantaneous magnitude of generative energy and the calculated feedback control variable; a requirement detection unit that detects a requirement on a drive of said vehicle; and a motor driving unit that calculates an output torque of said motor based on a direct torque output from said generator, which is under control of said generator control unit, and a required torque related to the detected requirement on the drive of said vehicle, and drives said motor to attain the calculated output torque.