Patent ID: 8200382
Filing Date: 2012-06-12
Classification: B60K,B60L,B60W,Y02T,Y10S

Abstract:
1. A method for controlling a drive torque of a hybrid drive unit of an automobile after a start, the hybrid drive unit comprising a first drive source and at least one electric machine, wherein the first drive source is an internal combustion engine, wherein the at least one electric machine is configured to be selectively operated in a motor-mode or in a generator-mode, wherein the at least one electric machine provides an electromotive torque in the motor-mode, which in conjunction with a torque of the first drive source represents a total drive torque of the hybrid drive unit, and supplies electric power in the generator-mode, the method comprising the steps of: determining an actual requested desired torque as a function of at least an actual pedal value; determining a predetermined nominal torque of the first drive source as a function of an actual rotation speed of the first drive source and independently of the actual requested desired torque; operating, if predetermined criteria are met, the first drive source according to the predetermined nominal torque; determining a torque difference between the predetermined nominal torque and the actual requested desired torque; and operating, when the torque difference is negative, the at least one electric machine in the motor-mode so as to provide an electromotive torque corresponding substantially to the torque difference.