Interrelated power delivery controls – including engine control – Clutch control – With fluid drive
Patent
1998-02-24
2000-05-09
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Clutch control
With fluid drive
477174, 477175, 701 68, F16H 6114
Patent
active
060596902
ABSTRACT:
A control system of a lockup clutch of a torque converter of a vehicle automatic transmission. A basic manipulated variable is determined in response to the vehicle operating condition in accordance with a predetermined characteristic, and the lockup clutch engaging force is controlled in response to the variable. In the system, fuzzy reasoning is carried out using the detected vehicle operating parameters to correct the basic manipulated variable, and the engaging force is controlled in response to the corrected manipulated variable, when the control condition is met. The corrected manipulated variable is gradually decreased with respect to time when the vehicle driving state has shifted from a region in which the engaging force is controlled in response to the corrected manipulated variable to a region in which the lockup clutch is disengaged. In addition, the corrected manipulated variable is gradually increased when the vehicle driving state has shifted from a region in which the lockup clutch is disengaged to a region in which the engaging force is controlled in response to the corrected manipulated variable.
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Saito Masahide
Sunada Satoru
Tanizawa Shoichi
Honda Giken Kogyo Kabushiki Kaisha
Ta Khoi Q.
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