Bayerische Motoren Werke Aktiengesellschaft

Till Scheffler

Georg Meder

Rudolf Kragl

Martin Lorscheid

Rolf Connert

Klaus Gebauer

Walter Strzoda

Wolfgang Weber

Erich Eichlinger

Stefan Uhl

Johann Hofmann

Felix Richert

Joachim Homeister

Wolfgang Heinle

Rudi Seethaler

The invention relates to a method for automatically switching off an internal combustion engine in a motor vehicle, in particular in a motor vehicle having an automatic transmission, by means of a stop/start device, which initiates measures for automatically switching off the internal combustion engine if the vehicle has been braked to a stop and advantageously held at a stop by actuation of the brake pedal for a predefined time interval. The invention is characterized in that the rotation speed of the internal combustion engine is changed, in particular reduced, at a defined point in time before the measures for automatically switching off the internal combustion engine are initiated.

Method for automatically switching off an internal combustion engine

A method for controlling an internal combustion engine of a motor vehicle. The method includes the use of an electronic control device for controlling the internal combustion engine in a motor vehicle, an irregular running determination unit for fault recognition, an injection quantity correction unit, a lambda probe associated with a defined group of cylinders, the injection quantity of a cylinder to be investigated of the defined group is adjusted in the direction of lean by a differential adjustment value associated with an irregular running differential value, and the injection value of at least one of the remaining cylinders, which are associated with the same lambda probe, is correspondingly adjusted in the direction of rich, so that in total a predetermined lambda value of this group of at least approximately 1 is reached.

Method for controlling an internal combustion engine of a motor vehicle

An electronic control device according to the invention is disclosed for controlling the internal combustion engine in a motor vehicle, for fault recognition with an irregular running determination unit and with an injection quantity correction unit, a defined group of cylinders being associated with a lambda probe, the injection quantity of a cylinder to be investigated of the defined group is adjusted in the direction of lean by a differential adjustment value associated with an irregular running differential value, and the injection value of at least one of the remaining cylinders, which are associated with the same lambda probe, is correspondingly adjusted in the direction of rich, so that in total a predetermined lambda value of this group of at least approximately 1 is reached. Homogeneous operation is thus ensured. The differential adjustment values may, for example, relate to the injection quantity itself, the injector stroke or the injection time. In this manner, a differential adjustment value individual to the cylinder is adjusted for each cylinder of the defined group. Correction values individual to the cylinder are then determined in that the differential adjustment values individual to the cylinder are related to one another.

Electronic control device for controlling the internal combustion engine in a motor vehicle

An actuator for actuating a non-camshaft driven lift valve () of an internal combustion engine () includes a reciprocating tappet () that is coupled to the lift valve (), a target ring () being attached to the outer circumference of the tappet, the target ring () having at least one slit and being made as a separate prefabricated part and consisting of an Fe-based material or of a ferritic material.

Actuator for actuating a lift valve

A device for measuring the height of lift of poppet valves, in particular for poppet valves installed in internal combustion engines, with the help of inductive pickups, including a coil in a stationary mount and a metal sleeve which is in flush alignment in the valve shaft and is axially movable in the coil, and the sleeve is secured with axial play within the groove.

Device for measuring the lift of poppet valves

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Munich, Germany

Till Scheffler