Interrelated power delivery controls – including engine control – Transmission control – Including fluid drive
Reexamination Certificate
2007-03-02
2009-10-20
Wright, Dirk (Department: 3655)
Interrelated power delivery controls, including engine control
Transmission control
Including fluid drive
C192S003310
Reexamination Certificate
active
07604566
ABSTRACT:
A torque converter lockup clutch control system is provided for an associated automatic transmission. The system includes a torque converter having an impeller operatively coupled to an associated internal combustion engine and a turbine operatively coupled to an input shaft of the associated automatic transmission. A lockup clutch is disposed within the torque converter for selectively locking the impeller to the turbine. A pressure regulator is operatively coupled to the torque converter for adjusting the pressure of a working fluid to at least one shift clutch of the associated automatic transmission in response to a speed differential between the impeller and turbine of the torque converter. A shift clutch slip detector is provided for detecting a slip condition of the at least one shift clutch of the associated automatic transmission and outputs a slip value. A processing component is then provided for receiving the slip signal and prohibiting the lockup clutch from entering into an engaged state when the slip value exceeds a predetermined shift clutch slip threshold.
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Duell Mark E.
Honda Motor Co. Ltd.
Rankin , Hill & Clark LLP
Wright Dirk
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