Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1996-05-13
1998-09-01
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477117, 477156, F16H 6120
Patent
active
058003088
ABSTRACT:
A control system for an automatic transmission operates a clutch for disengaging a transmission mechanism when a vehicle is stopped and idling with the brake pedal depressed while the gear shift is in a forward gear. The clutch is maintained at a drag state (friction elements disengaged but oil causing some torque transmission) bordering a slip state (friction elements engaged) When a neutral control is started, the clutch is released until the retraction of the piston of the hydraulic servo is started. When the rate of change in a rotational difference does not exceeds a reference rate of change even after a set time has elapsed, booster means of specific release state holding means decides that the clutch is in a drag region, and raises an oil pressure to be fed to the hydraulic servo, by a set pressure. On the other hand, when the rate of change exceeds the reference rate and the rotational difference increases, irrespective of the lapse of a set time, the first pressure reducing means of the specific release state holding means decides that the clutch is in a slip region, and lowers the oil pressure to be fed to the hydraulic servo, by a set pressure. As a result, the clutch is always held in a state which is immediately before the transfer from the drag region to the slip region.
REFERENCES:
patent: 4982622 (1991-01-01), Yamamoto et al.
patent: 5272630 (1993-12-01), Brown et al.
patent: 5301572 (1994-04-01), Tanaka et al.
patent: 5307727 (1994-05-01), Berger et al.
patent: 5343782 (1994-09-01), Jamzadeh
patent: 5363724 (1994-11-01), Asahara et al.
patent: 5527236 (1996-06-01), Kimura et al.
patent: 5558599 (1996-09-01), Tsukamoto et al.
patent: 5586954 (1996-12-01), Iwata et al.
Hayabuchi Masahiro
Nishida Masaaki
Tsukamoto Kazumasa
Tsutsui Hiroshi
Yamamoto Yoshihisa
Aisin Aw Co. Ltd.
Ta Khoi Q.
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