Patent ID: 6524223
Filing Date: 2003-02-25
Classification: B60K,B60W,F02D,F16H,Y02T,Y10T

Abstract:
A drive train for a motor vehicle, comprising:an engine which is controlled by an engine controller; a transmission which is controlled by a transmission controller; and a data link between the engine controller and the transmission controller, wherein signals are exchanged during a gear shift operation of the transmission, sensor signals being transferred from the engine controller to the transmission controller and an intervention signal being transferred from the transmission controller to the engine controller, by means of which intervention signal the engine is controlled by the engine controller during the driving mode of the motor vehicle, the intervention signal has a plurality of values by which the engine torque is reduced with the engine controller during the gear shift operations of the transmission, the engine speed is adjusted to a predefined value, the engine torque is switched over to a new setpoint value and a jerk control is carried out by adjusting the engine speed, wherein the intervention signal has an initial value in which a normal driving mode applies without a gear shift operation, a first value in which a torque control is carried out, a second value in which a slow engine speed adjustment is carried out, a third value in which a torque control is carried out and a fourth value in which a rapid engine speed adjustment is carried out with the drive train closed.