Daimler-benz Ag

Temic Telefunken Microelectronic Gmbh

Daimler Chrysler Ag

Walter Ulke

Udo Knepper

Dieter Driendl

Detlef Kaminski

Helmut Struck

Rolf Adomat

Michael V Klein

Bernd Schmitfranz

Karl-Heinz M&uuml;ller

Burkhard Voigt

Hans-Joachim Meyer

Ulrich Ruth

Wolfgang Voss

Karlheinz Butscher

Karl H Richter

In a procedure for the provision of access authorization for an engine-driven vehicle, if there is an operator request for the provision of access authorization to an engine-driven vehicle, a bidirectional signal transmission using encoded transmission signals and an electronic key will be effected. From transmission units located on or in the vehicle, vehicle signals will be transmitted to the electronic key, and, from the electronic key, key signals will be returned as echo signals to the respective transmission units. The time difference between the vehicle signal and the key signals will be determined and evaluated. The position of the electronic key in relation to the vehicle will be determined by means of successive bidirectional signal transmissions between at least two transmission units and the electronic key as well as by evaluating the time differences; having determined the actual key position, a decision on access authorization to the vehicle will be made.

Procedure for the provision of access authorization to an engine-driven vehicle

Method for controlling the closing process of closing devices with at

A process for checking the air pressure in the tires of motor vehicle wheels wherein at least a pressure signal characteristic for the air pressure will be picked up as a measured signal by a measurement device located in or on the tire of each motor vehicle wheel, wherein at least. a data signal containing a measured air pressure value derived from the pressure signal as well as an identification value characteristic for the respective transmitter device will be generated and output by a transmitter device located in or on the tire of each motor vehicle wheel, wherein the data signal output by the transmitter devices will be received by a reception device located at a distance to the motor vehicle wheels, and wherein the identification value of the transmitter device contained in the data signal will be compared by a control unit to identification comparison values assigned to the respective transmitter devices such that further processing of the data signal by the control unit will be effected only, if the identification value and the identification comparison value meet a specified assignment criterion.

Process for checking air pressure in vehicle wheel tires

A method and a device for transmitting and for measuring resistance values, is particularly provided for use in motor vehicles, for the constant control of airbag systems. In the method and device an exciter signal coupled into a secondary-side resonant LCR circuit from the primary side via inductively coupled coils is interrupted, transmitted back to the primary side of the transformer and is there used for determining the resistance value by evaluating the time constant of the exciter response.

Method for contactless measurement of a resistance arranged in the

In motor vehicles, in particular passenger cars possessing an axle or axles with steerable wheels, the steering-gear box is conventionally located asymmetrically with respect to the center-line. The result of this on the steering linkage is that the linkage part-sections between the steering-gear box and each of the wheels are of different design. This asymmetry can give rise to differences in the wear of the tires on these wheels, and is advantageously avoided according to this invention by making the overall stiffness values of the two part-sections identical, irrespective of the design-differences.

Steerable wheel suspension arrangement

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Friedrichshafen, Germany

Walter Ulke