Abstract: A process for adjusting the characteristics of infinitely variable transmissions of a vehicle with two drive mechanisms including detecting the output speeds of the transmissions and comparing them by means of an operating variable to determine the gear ratio. Adjusting the gear ratio as a function of a deviation for matching the characteristics. The characteristics are completely carried out for the operating variable and are detected and stored in a close point sequence by measuring the output speeds. When the vehicle is travelling, the deviations of the characteristics are compensated by an electronic unit which influences the predetermined operating variables so that when the transmissions are operated with the same predetermined operating variable, the output speeds are identical despite different characteristics.

Abstract: A method for braking a wheeled vehicle which has at least one adjustable hydrostatic drive unit with a variable displacement pump and a motor and a driving engine wherein the vehicle driving engine absorbs a drag moment and the kinetic energy of the vehicle is partially reduced hydraulically after the maximum drag moment which is absorbable by the vehicle driving engine is exceeded. In the method positive hydraulic braking is achieved when a limiting rpm of the driving engine is exceeded and the vehicle is braked to a speed at which the incline output power is less than or of the same magnitude as the drag power which is absorbable by the driving engine.

Abstract: A regulating device is proposed for control variables of an internal combustion engine, in particular for the fuel metering signal and the ignition signal, which has an intervention capability for signals of at least one knocking sensor on the engine via a knocking-signal evaluation circuit; this knocking-signal evaluation circuit includes a frequency recognition circuit and preferably an amplitude recognition circuit, and it detects and evaluates the knocking signal only during specific times or angles relating to the ignition signal. The frequency recognition circuit is realized by means of two counters. The counting range of the first counter marks the value of the upper threshold frequency which can be recognized, while the counting range of the second counter characterizes the frequency band.