Robert Boschgmbh

Andreas Meinken

Robert Sloboda

Anton Kantschar

Kai Dierssen

Rudi Eichhorn

Jochen Goebels

Jan Boettger

Werner Haeming

Carsten Kluth

Oskar Torno

Federico Buganza

Thomas Wieczorek

Stefan Kempf

Simon Bruestle

Frederic Gabel

Johannes Kastner

Frédéric Gabel

Bernhard Deibele

Goetz Stelzenmueller

A method for diagnosing a fuel tank vent valve of a motor vehicle. In the method it is inferred, from a curve of a pressure p over time in a sub-chamber of the motor vehicle after a start-up of an internal combustion engine of the motor vehicle, as to whether the fuel tank vent valve is jammed open. The sub-chamber contains a fuel tank of the motor vehicle and is delimited by the fuel tank vent valve.

Method for diagnosing a fuel tank vent valve

An apparatus for furnishing an amplified sensor signal of a knock sensor, encompassing an analog amplifier for amplifying the sensor signal in accordance with a first definable gain factor; an analog/digital converter for digitizing the amplified sensor signal into a digitized sensor signal; a digital amplifier for amplifying the digitized sensor signal in accordance with a second definable gain factor; and a control unit in order to furnish the first and the second gain factor as a function of a baseline sound level of the sensor signal, the baseline sound level corresponding to the component of the solid-borne sound signal generated in normal operation without knocking.

Knock detection system and method for an amplifier control for a knock signal

A method for computing an ignition angle of an internal combustion engine as a function of the operating conditions of the engine and knock signals K, which indicate knocking combustion in the engine. If knock occurs, the ignition angle is retarded. If knock stops for a first period, the ignition angle is advanced again. Advance of the ignition angle is limited on the basis of the first period. If knock stops for a second period, which exceeds the first period, the ignition angle is further advanced.

Method for computing an ignition angle of an internal combustion engine

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Kornwestheim, Germany

Andreas Meinken