Abstract: A brake pressure control device of a road vehicle has an automatic control of a starting clutch and/or of a transmission. During a stoppage of the motor vehicle achieved by a stoppage braking, the driver can, by a respective arbitrary activity, trigger a “starting assist” function for a defined time period. During this function, a continuation of the stoppage braking takes place by maintaining a brake pressure controlled into the wheel brakes by pressure maintaining valves so that, during the above-mentioned time period, the driver can change over to the accelerator pedal.

Abstract: An electronically controlled arrangement for changing the transmission ratio of a speed-change gearbox of a drive assembly of a motor vehicle, in which a change with the effect of changing-up is prevented by an inhibiting signal formed as a function of parameters of the control of the drive assembly or of the driving state. The change is re-authorized when the accelerator pedal again reaches a significant position determined by a change in level of the inhibiting signal and when a delay time determined by the actuation of the accelerator pedal has elapsed.

Abstract: An arrangement controls a drive engine when changing up a variable-speed transmission downstream in the power flow in order to reduce the engine torque. Given a lack of a torque reduction due to a malfunction, emergency operation is initiated in the system by accomplishing the change up rapidly through an increase in the operating pressure in the variable-speed transmission. To this end, an emergency switching stage, which operates as a function of the operating point of the drive engine, can be moved into a position to transmit a pressure control signal for the gear changing device of the variable-speed transmission when the gear change detection signal for the start of changing up is present and there is no check-back signal indicating the position of the actuator for reducing the engine torque. The engine operating point is located in a range of the engine ignition map so as to be selected for emergency operation.

Abstract: An arrangement and method for controlling a driving engine--in the sense of reducing the torque when changing, to a higher gear, a step-change gearbox located downstream in the force path,--generates a gear-change recognition signal for the recognition of the gear-changing procedure and determining the beginning of the reduction exclusively by analysis of the variation of the engine rotational speed suppresses that signal on the appearance of rotational speed variations not caused by gear changing.