PROCESS AND DEVICE FOR CONTROLLING BOOST PRESSURE

PCT No. PCT/DE89/00555 Sec. 371 Date Apr. 30, 1990 Sec. 102(e) Date Apr. 30, 1990 PCT Filed Aug. 24, 1989 PCT Pub. No. WO90/03503 PCT Pub. Date Apr. 5, 1990.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.