System for determining residual life of friction clutch
First Claim
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1. A system for indicating a residual life of a friction clutch, comprising:
- means for detecting a differential revolution of the clutch and for generating a differential revolution signal indicative thereof;
means for detecting a control pressure of a working fluid used to generate a clutch engaging force of the clutch and for generating a control pressure signal indicative thereof;
means for measuring a loading time of the clutch and for generating a loading time signal indicative thereof;
means for determining a loaded condition of the clutch when the clutch is engaged based on said differential revolution signal, said control pressure signal, and said loading time signal, and for generating a loaded condition signal indicative thereof;
means for accumulating an amount of time that a facing of the clutch is subjected to said loaded condition since the clutch has been in service; and
means for calculating the residual life based on the accumulated amount of time.
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Abstract
A system for determining a residual life of a friction clutch is constructed so that the loaded condition of the clutch is determined in accordance with detected differential revolution, control oil pressure, oil temperature, and loading time, with which the residual life of the friction clutch is calculated.
35 Citations
8 Claims
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1. A system for indicating a residual life of a friction clutch, comprising:
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means for detecting a differential revolution of the clutch and for generating a differential revolution signal indicative thereof; means for detecting a control pressure of a working fluid used to generate a clutch engaging force of the clutch and for generating a control pressure signal indicative thereof; means for measuring a loading time of the clutch and for generating a loading time signal indicative thereof; means for determining a loaded condition of the clutch when the clutch is engaged based on said differential revolution signal, said control pressure signal, and said loading time signal, and for generating a loaded condition signal indicative thereof; means for accumulating an amount of time that a facing of the clutch is subjected to said loaded condition since the clutch has been in service; and means for calculating the residual life based on the accumulated amount of time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for determining a residual life of a friction clutch, the method comprising the steps of:
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a) sensing a differential revolution of the clutch; b) detecting a pressure of a working fluid used to generate a clutch engaging force of the clutch; c) measuring a loading time during which said clutch engaging force is generated; d) determining a loaded condition of the clutch when the clutch is engaged based on said differential revolution, said pressure of said working fluid and said loaded time; e) accumulating an amount of time that said loaded condition is detected since the clutch has been in service; and f) calculating the residual life based on the accumulated amount of time. - View Dependent Claims (8)
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Specification