Interrelated power delivery controls – including engine control – Clutch control – With fluid drive
Patent
1997-08-27
1999-03-30
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Clutch control
With fluid drive
477167, 477907, 60405, F16H 6114
Patent
active
058881662
ABSTRACT:
A method and an apparatus control a car equipped with an automatic transmission having a lockup clutch. When the lockup clutch is in the lockup state, a variation of a generated torque is detected. When the range of the torque variation detected exceeds a predetermined value, an engine torque is reduced by controlling the engine, and the automatic transmission is controlled to compensate for a reduction of the driving torque due to a reduction of the engine torque. Thus, the speed change ratio is changed to the low gear side. The control unit includes a unit for controlling an output torque of an engine according to a command value, a unit for changing the transmission ratio of the automatic transmission, a unit for detecting a variation of the engine torque, a unit for deciding a target driving torque, a unit for reducing a torque command value when the range of a detected variation of the torque has exceeded a predetermined value when the lockup clutch was in the lockup state, and a unit for deciding a transmission ratio at which the reduction of the driving torque due to the reduction of the engine torque is compensated for.
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Ibamoto Masahiko
Kawashima Ken'ichi
Kuroiwa Hiroshi
Minowa Toshimichi
Nishimura Yutaka
Estremsky Sherry Lynn
Hitachi , Ltd.
Marmor Charles A.
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