METHOD FOR COMPENSATING ROTATIONAL IRREGULARITIES OF AN INTERNAL COMBUSTION ENGINE OF A DRIVE TRAIN OF A HYBRID VEHICLE

摘要

For a control of an electric motor (2) of a drive train (1) of a hybrid vehicle, which control can be implemented and carried out in a simple manner, it is proposed to detect the shaft torque (TW) of the engine shaft (11) of the current work cycle (n) of the internal combustion engine (3) and to feed it to a compensation controller (K), to store the shaft torque (TW(n−1)) of a preceding work cycle (n−1) of the internal combustion engine (3) in the compensation controller (K), and to calculate a compensated shaft torque (Tkomp) from the shaft torque (TW(n)) of the current work cycle (n), the shaft torque (TW(n−1)) of a previous work cycle (n−1) and the shaft torque of a previous work cycle (n−1) shifted by a system delay, which compensated shaft torque (Tkomp) is linked to a target torque (Tsoll) predefined by a higher-level control unit (15) to determine the controlling torque (Tstell).

主权项

1. A method for compensating the rotational irregularities of an internal combustion engine of a drive train of a hybrid vehicle, wherein an electric motor of the drive train is connected via a drive shaft to the drive wheels and via an engine shaft to the internal combustion engine, which introduces rotational irregularities into the drive train, and the electric motor is controlled by a drive controller and, for this purpose, a controlling torque (Tstell) is given to the electric motor by the drive controller, wherein the shaft torque (TW) of the engine shaft of the current work cycle (n) of the internal combustion engine is detected and is fed to a compensation controller, that the shaft torque (TW(n−1)) of a previous work cycle (n−1) of the internal combustion engine is stored in the compensation controller, and that a compensated shaft torque (Tkomp) is calculated from the shaft torque (TW(n)) of the current work cycle (n), the shaft torque (TW(n−1)) of a previous work cycle (n−1) and the shaft torque of a previous work cycle (n−1) shifted by a system delay, which compensated shaft torque (Tkomp) is linked to a target torque (Tsoll) predefined by a higher-level control unit to determine the controlling torque (Tstell) in order to compensate the rotational irregularities of the internal combustion engine by means of the electric motor.