Robert Boschgmbh

J&uuml;rgen L&ouml;ffler

Martin-Peter Bolz

Marko Poljansek

Wolfgang Hermsen

Andrea Steiger-Pischke

Holger H&uuml;lser

Rasmus Frei

Bram Veenhuizen

Holger Hulser

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

The invention proceeds from a motor vehicle having a drive train and the elements of the drive train are rotatable. The determination of a quantity, which represents the traction resistance, takes place in such a manner that an acceleration quantity is detected. This acceleration quantity represents the instantaneous acceleration of the vehicle. Furthermore, a reference quantity for the acceleration of the vehicle is detected and the quantity, which represents the traction resistance, is determined in dependence upon a comparison of the detected acceleration quantity with the determined reference quantity. The essence of the invention is that a rotation quantity is determined which represents the rotation torque of at least one element mounted in the drive train. The determination of the reference quantity takes place in accordance with the invention in dependence upon the determined rotation quantity. It is especially provided that the rotation quantities of individual elements, which are mounted in the drive train, are determined separately.

Method and device for determining a variable representing the road resistance on a motor vehicle

The invention proceeds from a system for considering differing amounts of components for determining at least one control quantity such as for controlling the operation of a motor vehicle. Such a system is known from the state of the art wherein a value is determined as a control quantity for the adaptive transmission control. This value characterizes the type of driver or the driving style. At least two different supply objects (for example, start-up evaluation, gradient evaluation) are provided with the aid of which, for each case, a component for determining the control quantity is determined. The determined components are then supplied to at least one collector which forms the evaluation quantity, for example, by maximum formation, weighted and/or moving-window sum formation of the individually determined components. The essence of the invention is that means are provided with which the supply of the components of the supply objects is controlled to the collector. With the system of the invention, it is possible in a simple manner to adapt the number of components, which are to be considered for the formation of the evaluation quantity, to the particular situation.

System for determining a control quantity

Growing community of inventors

Winnenden, Germany

Jürgen Löffler

Growing community of inventors

Winnenden, Germany

J&uuml;rgen L&ouml;ffler

Jürgen Löffler