Interrelated power delivery controls – including engine control – Transmission control – Anticreep
Patent
1995-04-25
1996-08-20
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
Anticreep
475120, 475125, F16H 6120, F16H 5904, F16H 5914, F16H 5922
Patent
active
055474365
ABSTRACT:
A control system for an automatic transmission in a vehicle powertrain including an engine and a fluid coupling for transmitting the rotation of an engine to the transmission, the transmission having a clutch which is applied responsive to selection of a forward running range and a hydraulic servo for applying the clutch responsive to an oil pressure. The control system includes a control unit for controlling the oil pressure to the hydraulic servo; an input torque detector for detecting the input torque to be inputted to the transmission; and a specific state detector for detecting satisfaction of a set of specific starting conditions including: (1) that the forward running range has been selected, (2) that the vehicle is stopped and (3) that the engine is in an idling state. The control unit sets the oil pressure to the hydraulic servo to correspond to the input torque at the instant of detection of satisfaction the specific starting conditions, and includes: a first pressure-reducer for abruptly reducing the oil pressure of the hydraulic servo to a set oil pressure immediately before the release of the clutch is started; and a second pressure-reducer for gradually reducing the oil pressure of the hydraulic servo, which has been reduced to the set oil pressure by the first pressure-reducer.
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Hayabuchi Masahiro
Iwata Akihito
Mikami Kazuhiro
Nishida Masaaki
Tsutsui Hiroshi
Aisin Aw Co. Ltd.
Jensen Nathan O.
Marmor Charles A.
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