Patent ID: 7633247
Filing Date: 2009-12-15
Classification: B60K,B60W,Y02T

Abstract:
1. A control apparatus for a motor generator of a hybrid vehicle, wherein the motor generator is mechanically connected to a drive train of the vehicle and electrically connected to an electric energy source of the vehicle, and wherein the motor generator is configured to have a generator mode, in which the motor generator receives torque from the drive train to generate electric energy, and a motor mode in which the motor generator receives electric energy from the electric energy source to generate torque, the control apparatus comprising: a determiner working to determine values of a first and a second parameter, the first and second parameters being defined in the same unit and respectively representative of economic benefits obtainable by operating the motor generator in the generator and motor modes; a comparator working to compare the determined values of the first and second parameters; and a controller working to control the motor generator to operate in the generator mode when the value of the first parameter is greater than that of the second parameter and in the motor mode when the value of the second parameter is greater than that of the first parameter, wherein the first parameter is defined to be proportional to a difference between a first predetermined threshold and an increase in fuel consumption of the vehicle for operating the motor generator in the generator mode to generate unit electric energy, and the second parameter is defined to be proportional to a difference between a decrease in fuel consumption of the vehicle achievable by operating the motor generator in the motor mode with unit electric energy and a second predetermined threshold.