Patent ID: 7458916
Filing Date: 2008-12-02
Classification: B60K,F02D,Y10T

Abstract:
1. A method for controlling a motive power group of a motor vehicle driven by an internal combustion engine, the vehicle equipped with means for controlling the motive power group, including means for forming a signal representative of depression of an accelerator pedal initiated by a vehicle operator and means for detecting any degradation of the signal representative of the depression of the accelerator pedal, the method comprising: upon detection of degradation of the signal representative of the depression of the accelerator pedal, regulating vehicle speed when the vehicle speed is higher than a threshold value and regulating engine speed when the vehicle speed is lower than the threshold value, wherein the means for controlling the motive power group is associated with regulation means, activated by detection of degradation of the signal representative of the depression of the accelerator pedal, for regulation of the vehicle speed or the engine speed, depending on whether the speed of the vehicle is higher or lower than the threshold value, and the regulation means includes means for generating a vehicle-speed setpoint and an engine-speed setpoint, an engine-speed regulator supplied by a difference between the engine speed and the engine speed setpoint, a vehicle speed regulator supplied by a difference between the vehicle speed and the vehicle speed setpoint, means controlled by the setpoint-generating means for functionally connecting the engine-speed regulator or vehicle-speed regulator to the means for controlling the motive power group depending on whether the vehicle speed is lower or higher than the threshold value.