Method and apparatus for controlling the operation of a clutch in the power train of a motor vehicle
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United States of America Patent
Stats
-
May 28, 2002
Issued Date -
N/A
app pub date -
Aug 10, 2000
filing date -
Aug 26, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The extent of engagement of an automatically adjustable friction clutch in the power train of a motor vehicle, wherein the clutch receives torque from a rotary output element of an engine and transmits torque to the rotary input element of a transmission, is determined by an electronic control unit in conjunction with an actuator which is responsive to signals from the control unit. Under normal circumstances, the adjustment of the clutch is selected on the basis of control signals which depend upon the actual RPM of the output element and the RPM of the input element. When the actual RPM of the output element departs from a desired RPM, the control signal is altered to reduce the rate of torque transmission by the clutch upon a determination that the actual RPM is below the desired RPM, and to increase the rate of torque transmission by the clutch when the actual RPM exceeds the desired RPM.
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