Continental Teves, Ag and Company Ohg

Christian Suβmann

Andreas Köbe

Daniel Fischer

Markus Irth

Frank Schreiner

Martin Grieβer

A method for indirectly monitoring tire pressure or for detecting damage to a wheel suspension, wherein a pressure loss detection variable (DVE) is determined using an analysis of a vibratory behavior of a wheel of a motor vehicle, and a pressure loss in the tire of the wheel or damage to the wheel suspension is detected by comparing a momentarily determined pressure loss detection variable (DVE) to a learned pressure loss detection variable (DVE), wherein at least two dimensional variables are determined from a wheel speed signal (w) of the wheel, each representing a dimension for the extent of a frequency or a frequency range in the vibratory behavior of the wheel, and that the pressure loss detection variable (DVE) is derived from the two dimensional variables (e, e, e), particularly from a ratio of the two dimensional variables (e/e), and a tire pressure monitoring system.

Method for indirectly monitoring tire pressure and tire pressure monitoring system

A system and method for indirect tire pressure monitoring. A pressure loss variable (X, f, c) is determined based on an analysis of an oscillation behavior of a tire of a motor vehicle for the detection of a pressure loss in the tire of a wheel. A variable (&#x3b1;, &#x3b1;/v) representing an increase (&#x3b1;) of a wheel torque slip curve, or depending on an increase (&#x3b1;) of a wheel torque slip curve (&#x3b1;/v), is determined from the oscillation behavior of the tire, and the variable (&#x3b1;, &#x3b1;/v) and the pressure loss variable (X, f, c) are used for detecting the pressure loss.

Method for indirect tire pressure monitoring and tire pressure monitoring system

A method for detecting the direction of travel or for detecting a change in the direction of travel of a motor vehicle which has at least two wheel speed sensor arrangements which each comprise an encoder with an incremental scale and a plurality of scale graduations and a wheel speed sensor (SEa, SEb, SEc, SEd) and are connected to an electronic control unit, wherein, when a scale graduation is sensed the wheel speed sensors each transmit a speed signal to the electronic control unit, wherein the direction of travel or a change in the direction of travel is identified at least from the order in which the speed signals occur with respect to the individual wheel speed sensor arrangements. A computer program product for carrying out all the steps of the method is also disclosed.

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Bad Soden, Germany

Christian Suβmann