Abstract: An arrangement for boost control either has a pressure sensor and a differential-pressure sensor, the pressure sensor being connected to one of two suction paths of an internal combustion engine and the differential-pressure sensor being located between the two suction paths, or the device possesses a single pressure sensor 18 which is switched alternately to the first suction path 11.1 and to the second suction path 11.2 by means of a change-over valve 24.These arrangements and the associated methods make it possible to control to the same predetermined pressure in the two suction paths with a high degree of accuracy. This is because there is no possibility of a systematic error which, in previous arrangements and methods, arose from the fact that the pressures in the two suction paths were measured by separate pressure sensors. However, different pressure sensors in a simple version indicate different values at the same pressures.

Abstract: A method for recognition of the power stroke of an internal combustion engine is proposed, in which recognition as to whether a cylinder is currently in the power stroke is possible by means of camparison of a signal that is synchronous with the crankshaft angle and a signal that is modulated by the combustion events of the engine.

Abstract: A first control unit of a multiple function control system for a motor vehicle engine controls a function, such as fuel injection, for which it is desirable to provide an engine load signal measured by the amount of air drawn or forced into the engine per unit of time, determined by what is generally known as an air quantity meter. A second control unit of the control system controls the timing of an electrical ignition system for which it has been conventional to supply an engine load signal derived from a pressure transducer.