Method and device for detecting a drop in pressure in motor vehicle tyres
First Claim
1. Method for detecting a pressure loss of tires in a motor vehicle during travel, especially for detecting the seating of the tire casing on an emergency tread present in the tire or the lowering of the tire pressure below a threshold value (critical tire pressure), via evaluation of sensor determined angular velocities of the wheels of the motor vehicle or evaluation of informations, which indicate the angular velocities on the basis of time intervals, characterized in that the method for pressure loss detection is based on detecting a high pressure loss or a total pressure loss based on a reduction of the angular velocity and/or of an increase of the dynamic rolling radius rd in one or more wheels.
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Abstract
The invention relates to a method for detecting a drop in pressure of a motor vehicle tire by evaluating wheel speeds determined by sensors. The method for detecting the drop in pressure is based on the detection of a large drop in pressure or a complete drop in pressure using a reduction of the angular velocity or an increase (8) in the dynamic read radius rd of one or more wheels. The invention also relates to a device for controlling the braking power and/or driving dynamics and for measuring the pressure of vehicle tires wherein a microcomputer, which is connected to wheel rotational speed sensors and optionally to driving dynamic sensors, is used to perform the aforementioned method and a known method for regulating the braking power and/or driving dynamics.
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Citations
12 Claims
- 1. Method for detecting a pressure loss of tires in a motor vehicle during travel, especially for detecting the seating of the tire casing on an emergency tread present in the tire or the lowering of the tire pressure below a threshold value (critical tire pressure), via evaluation of sensor determined angular velocities of the wheels of the motor vehicle or evaluation of informations, which indicate the angular velocities on the basis of time intervals, characterized in that the method for pressure loss detection is based on detecting a high pressure loss or a total pressure loss based on a reduction of the angular velocity and/or of an increase of the dynamic rolling radius rd in one or more wheels.
Specification