Robert Boschgmbh

Ralf Klein

Klaus Joos

Juergen Gras

Peter Wiltsch

Thomas Edelmann

Hans Deichsel

Bernd Schott

Volker Stegmann

Bernhard Erb

A method for operating a motor vehicle having an internal combustion engine. In the method, the operation of the motor vehicle is influenced as a function of at least one operating parameter determined during an operating time of the motor vehicle. In order to take wear and tear of the motor vehicle and the internal combustion engine into consideration, an operating parameter suitable for determining wear and tear of the motor vehicle is detected, a value corresponding to the wear and tear is determined, and the operation of the motor vehicle is adjusted according to the determined value.

Method, computer program, and control system for operating a motor vehicle having an internal combustion engine

A tank-venting system includes an active charcoal filter ( ), which is connected to a tank ( ). An intake manifold ( ) of an internal combustion engine is connected to a tank-venting valve ( ). The active charcoal filter ( ) stores fuel vaporized in the tank ( ). When the tank-venting valve ( ) is driven open by the control unit ( ), air from the ambient is drawn by suction through the active charcoal filter ( ) and the fuel stored therein is released to the inducted air. A pump ( ) is provided for checking the tightness of the tank-venting system and is connected to the control unit ( ). A switchover valve ( ) is connected downstream of the pump ( ). A reference leak ( ) is arranged in parallel to the switchover valve ( ). A throughflow sensor ( ) and a temperature sensor ( ) are connected forward of the pump ( ) which detect the scavenging air quantity, which is used to scavenge the active charcoal filter ( ), as well as the intake air temperature. The sensors transmit the scavenging air quantity and the temperature to the control unit ( ). Based on the scavenging air quantity and the intake air temperature, the control unit determines whether the pump ( ) is iced at the particular time point. In case of a determination of &ldquo;iced&rdquo;, the tightness measurement is not enabled by a control signal and/or the output of a fault signal, which indicates non-tightness of the tank-venting system, is suppressed.

Method and arrangement for detecting icing in pumps utilized in the diagnosis of tank leakage in motor vehicles

The invention is directed to a method for adjusting a supplemental quantity of fuel which is supplied to an internal combustion engine during warm-up operation in addition to a basic quantity measured for an operationally warm engine. The method includes the step of basing the adaptation of the supplemental quantity of fuel on an evaluation of the control actuating variable of an idle speed control.

Method for adjusting a supplemental quantity of fuel in the warm-up

A method of proportioning fuel in an air/fuel mixture to be fed to an internal combustion engine upon starting, which method ensures reliable starting, even when fuel-injection settings which have been determined for good fuel, are used with poor fuel. As long as a test-end condition has not been satisfied, the engine's speed of rotation is checked to determine whether an increase in speed of rotation is present within a predetermined range. If not, a stored correction value for correcting the amount of fuel injected, which is determined as a function of the state of operation of the engine, is changed in such a manner so as to yield an air/fuel mixture which is ignitable in a desired manner, which mixture leads, upon combustion, to an increase in the speed of rotation within the predetermined range.

Method and apparatus for proportioning fuel upon the starting of an

The invention is directed to a method of metering fuel to the engine during warm-up operation which precedes normal operation of the engine during which a first amount of fuel is metered to the engine. The engine is equipped with a lambda control and a device for detecting a variable suitable for distinguishing warm-up operation and normal operation of the engine. A predetermined corrective factor (FWL) is provided in dependence upon the variable. A second amount of fuel is metered to the engine during the warm-up operation which is increased by the corrective factor (FWL) so that the second amount is greater than the first amount. Lambda control is engaged during the warm-up operation and provides a desired lambda value (.lambda..sub.des). A quantity is formed indicative of the mean deviation of the actual lambda value (.lambda..sub.act) from the desired lambda value (.lambda..sub.des) when the lambda control is engaged. The quantity is applied to increase the corrective factor (FWL) when the quantity indicates that the mean value of the actual lambda value (.lambda..sub.act) is greater than the desired lambda value (.lambda..sub.des) and decrease the corrective factor (FWL) when the quantity indicates that the mean value of the actual lambda value (.lambda..sub.act) is less than the desired lambda value (.lambda..sub.des).

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Bad Wimpfen, Germany

Ralf Klein