Daimler Chrysler Ag

Mercedes-benz Aktiengesellschaft

Hella Kg Hueck and Co.

Fritz Braun

Nikolaus Decius

Winfried Stiltz

Ursula Felger

Tomas Hrycej

Thomas Lich

Gunnar Borenius

Jakob Wojtacki

Heiko Gruenberg

Otto Jung

Uwe Spieth

Joachim Finsterbusch

Kurt-Juergen Merz

In a method for monitoring tire air pressure of the wheels of an automobile, longitudinal force of the tires-slip test data pairs are measured and recorded for at least one wheel, while the automobile is being driven. A corresponding evaluation unit determines a compensation curve for the recorded longitudinal force of the tires-slip test data pairs, along with an associated offset value based on a zero point in a longitudinal force of the tires-slip performance graph. From the offset value, the respective wheel radius relationship between at least one driven and one non-driven wheel can be calculated, and from this the relative tire pressure of the wheels can be determined.

Method and device for monitoring the tire air pressure of the wheels of

A system for monitoring the vehicle tire inflation pressure has a device for detecting the vertical acceleration of the tire or of a vehicle component connected therewith and the longitudinal speed of the vehicle, as well as having an analyzing unit which determines the tire inflation pressure from the measured vertical acceleration data and the measured vehicle longitudinal speed data. The analyzing unit contains a trainable estimating unit, particularly a neuronal network, which is trained by predeterminable training example data with different tire inflation pressure values and vehicle longitudinal speed values. In the trained condition, the estimating unit determines the tire inflation pressure at least as a function of the measured vertical acceleration and vehicle longitudinal speed data fed directly or preprocessed on an input side thereof. The system provides continuous tire inflation pressure monitoring in the case of road vehicles.

System for monitoring the inflation pressure of a vehicle

An electronic apparatus, process for its duplication, and arrangement for data transfer between two similarly constructed electronic apparatus is described in which the electronic apparatus has a microprocessor or microcontroller, a non-volatile memory, and an interface. The microprocessor or microcontroller, the non-volatile memory and other measures of the apparatus allow a data content of a certain memory component of a certain other apparatus to be simply transferred into the non-volatile memory. The apparatus thus has the ability to bequeath its data characteristics, or to duplicate itself. Further, a process is described for carrying out such a duplication. Assuming a second inventive electronic apparatus is built, a particular advantageous arrangement can be created in which a data record can be completely transferred from the memory of the first apparatus into the memory of the second apparatus. This data transfer is even beneficially possible when the second apparatus is partially defective.

Electronic apparatus, process for its duplication, and arrangement for

A method and apparatus for determining and extending a change interval for an operating fluid of a unit, particularly for an engine of a motor vehicle, uses at least one directly or indirectly recorded operating variable which represents the qualitative condition of the operating fluid. An evaluation of the at least operating variable and a continuous calculation of the change interval therefrom is performed by a computing and control unit. The calculated change interval is related to a specified unit service interval and, if the change interval expires before the service interval, a regeneration signal for the removal of a certain quantity of the spent operating fluid and the replacement of the quantity with a fresh operating fluid is produced as a function of the difference therebetween.

Method and apparatus for determining and extending a change interval for

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Kernen, Germany

Fritz Braun