Robert Boschgmbh

Martin Person

Helmut Denz

Ernst Wild

Martin Streib

Klaus Walter

Karl Ott

Martin Zechnall

Rolf Daumer

Tobias Roulet

Juergen Wuerth

Ekkehard Feldmann

Thomas Mossner

The invention is directed to a method and an arrangement for controlling the drive power of a motor vehicle equipped with a chargeable spark-ignition engine. In this method and arrangement, the engine power is adjusted via the air input and the charging pressure independently of each other as a function of the accelerator pedal deflection. In one range of the accelerator pedal deflection, the engine power is adjusted by adjusting an engine power actuator in dependence upon the accelerator pedal deflection and/or, in another range, the charging pressure is adjusted in dependence upon the accelerator pedal deflection.

Method and arrangement for controlling the drive power of a motor vehicle

For detecting a backward revolution of a revolving component of an internal combustion engine, with a sensor which senses a revolving component having at least one angular mark, the backward revolution is assumed when a prescribable value between two pulses of the signal of the sensor is exceeded, and stalling is detected after it is ensured that the backward revolution of the internal combustion engine has taken place, and outputting of further injections and/or ignitions is suppressed until a resynchronization of the system takes place after a prescribable time has passed.

Device for and a method of detecting the backward revolution of a

The oil pressure applied to a hydraulic device for controlling within a limited angular range of a cam shaft and its drive gear is controlled by a magnetic valve (35) which is switched between its open and closed position under control of the same microcomputer which controls engine ignition and/or fuel injection with reference to a predetermined function of some of the same engine operation parameters, namely engine speed and engine load, which are used to control ignition and/or fuel injection. The control function can advantageously also take account of rate of change of engine load or engine speed. A transducer (43) for reporting back the sleeve (22) which controls the mechanical rotary shift in response to oil pressure can be used to provide an actual value signal to the computer for generation of an error signal for controlling the magnetic valve so as to provide a continuous control of the overlap of the open periods of the intake and exhaust valves of the engine. The control function for the operation of the magnetic valve provides for hysteresis to prevent excessive switching back and forth.

Multidependent valve timing overlap control for the cylinders of an

Fluctuations of engine speed in the frequency range from 2 to 8 Hz, which produce 'bucking' behavior of a motor vehicle, are detected by passing engine speed signals through a filter which reduces and delays the oscillations and a difference signal is then produced between the original and the processed speed signal in order to derive an alternating signal in the form of a square wave indicating the sign of a correction to be made to engine ignition timing for counteracting the bucking oscillations of engine speed. The square wave determines the sign of an anti-bucking ignition timing correction factor, of which the absolute value may be constant or may vary according to the sign of the correction and, if desired, also in accordance with engine operation parameters.

System for damping bucking oscillations of an automobile engine

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Oberriexingen, Germany

Martin Person