Patent ID: 6826462
Filing Date: 2004-11-30
Classification: B60C,B60T

Abstract:
Method of detecting pressure drop in the tires of motor vehicles comprising the steps of:A) producing at least two differently determined reference values which are produced from at least two wheel speed data of the group left front wheel VL, right front wheel VR, left rear wheel HL, and right rear wheel HR, B) detecting a preliminary pressure drop by checking whether at least one of said at least two differently determined reference values is included within a predetermined minimum deviation from a respectively associated nominal value, C) considering a final detection of a pressure drop to prevail in dependence on one or more methods for checking the plausibility, wherein step A) includes the following substeps of: (a) storing an old reference value in a memory, (b) determining a new reference value after a predetermined defined time, (c) determining whether the new reference value deviates from the old reference value by a fixed minimum amount, and storing the new reference value in the memory associated with the old reference value, (d) resetting a counter to a start value if step (c) is satisfied, otherwise, if the condition of step (c) is not satisfied, continuously incrementing the counter by a defined amount, (e) suppressing the determination of new reference values of step (b), if a predetermined count of the counter used is not exceeded.