Lock-up clutch slip control apparatus and engine fuel-cut contro

Details Lock-up clutch slip control apparatus and engine fuel-cut contro Lock-up clutch slip control apparatus and engine fuel-cut contro

1995-07-17

1997-05-06

Wright, Dirk

Interrelated power delivery controls, including engine control

Clutch control

Engine controlled by clutch control

192 33, F16H 6114, F02D 4112

Patent

active

056265360

ABSTRACT:
A slip control apparatus for a lock-up clutch in a power transmitting device of a motor vehicle equipped with a fuel-cut device for cutting a fuel supply to an engine when the engine speed is higher than a predetermined value, the apparatus including (a) a slip control device for controlling the lock-up clutch such that the actual slip speed coincides with a target slip speed, (b) a detector for detecting deceleration following acceleration of the vehicle, and (c) a timing control device for commanding the slip control device to initiate a slip control operation upon detection of the vehicle deceleration, and inhibiting the fuel-cut device from initiating a fuel-cut operation for a predetermined delay time after the initiation of the slip control operation. For controlling the lock-up clutch, the slip control means produces a slip control output determined on the basis of a feedback control value and a feed-forward control value. The apparatus may include a device for zeroing or reducing the feedback control value after the fuel-cut operation is initiated.

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