Robert Boschgmbh

Holger Hulser

Martin-Peter Bolz

Joachim Luh

Bram Veenhuizen

J&uuml;rgen L&ouml;ffler

Jurgen Loffler

The invention proceeds from a system for adjusting a motor vehicle transmission, which is changeable in its transmission gear ratio, the transmission having an efficiency characteristic which is dependent on the transmission gear ratio. A first quantity is detected which represents the actual transmission output rpm and a second quantity is determined which represents a desired value for the drive torque. Then, a desired rpm of the vehicle engine is determined at least in dependence upon the detected first quantity and the determined second quantity and in dependence upon the efficiency characteristic of the transmission. The adjustment of the transmission gear ratio takes place in dependence upon the desired rpm of the vehicle engine which is so determined. With the invention, transmission influences are considered in the determination of the optimal transmission gear ratio within a system for the coordinated drive train control. The advantage, which results from the above, is the basic possibility to better adapt the drive train to the requirements by optimizing the total efficiency, the torque reserve and other optimizing criteria.

System for regulating a gear transmission ratio

Method and device for controlling the drive train of a motor vehicle

Device and method for adjusting the transmission ratio of a CVT

Growing community of inventors

Stuttgart, Germany

Holger Hulser