Process and apparatus for detecting damper damage
First Claim
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1. A method for detecting shock absorber damage, comprising:
- detecting wheel speed signals of an antilock braking system rotational wheel speed sensor; and
determining a condition of said shock absorber by analyzing said wheel speed signals.
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Abstract
In a method and apparatus for detecting shock absorber damage, features of a shock absorber are determined by analyzing a signal of an antilock braking system rotational wheel speed sensor.
15 Citations
32 Claims
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1. A method for detecting shock absorber damage, comprising:
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detecting wheel speed signals of an antilock braking system rotational wheel speed sensor; and
determining a condition of said shock absorber by analyzing said wheel speed signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. Apparatus for detecting shock absorber damage in a vehicle having an antilock brake system that includes a rotational wheel speed sensor, said apparatus comprising:
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a processing unit coupled to receive rotational wheel speed signals from said rotational wheel speed sensor;
wherein said processing unit determines characteristics of a shock absorber by analyzing said rotational wheel speed signals of said antilock brake system rotational wheel speed sensor.
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21. The apparatus according to claim 20, wherein said processing unit comprises a component for computing at least one of an auto power density spectrum Φ
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Δ
r for the temporal course of the radius change Δ
r, and an auto power density spectrum Φ
Δ
n for the temporal course of the rotational speed change Δ
n. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Δ
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30. A method for detecting shock absorber damage, comprising:
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detecting wheel speed signals of an antilock braking system rotational wheel speed sensor; and
determining an auto density spectrum based on said wheel speed signals;
comparing values of said auto density spectrum within a reference frequency range wherein said values are substantially independent of effectiveness of shock absorber performance, with values of said auto density spectrum within an analysis frequency range, wherein said values depend on effectiveness of shock absorber performance; and
detecting shock absorber damage, based on results of said comparing. - View Dependent Claims (31, 32)
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Specification