Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1997-04-18
1999-07-20
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477144, 477148, 477154, F16H 6108
Patent
active
059249587
ABSTRACT:
If a shift to the 3rd speed is decided during the 5th-4th speed shift, in which the hydraulic servo for a second clutch is released by pressure regulation control, a changeover valve is switched by a solenoid valve so that the fluid pressure P.sub.C2 from the pressure regulating valve is conducted to a third clutch hydraulic servo. Thereby, the third clutch hydraulic servo pressure P.sub.C3 stands by at a predetermined engaging pressure P.sub.H and, at the same time, the servo-start of a fourth brake fluid pressure P.sub.B4 is performed by another pressure regulating valve. Meanwhile, the fluid pressure P.sub.C2 is released by an accumulator. After the servo-start ends and the 4th speed is established, the 4-3 speed shift control is performed, thus preventing shift shock and reducing shift duration.
REFERENCES:
patent: 4955257 (1990-09-01), Terayama et al.
patent: 5431604 (1995-07-01), Marusue et al.
patent: 5439427 (1995-08-01), Enokido et al.
patent: 5624351 (1997-04-01), Fujita et al.
patent: 5647819 (1997-07-01), Fujita et al.
patent: 5816950 (1998-10-01), Kamada et al.
Nishida Masaaki
Suzuki Akitomo
Tsuchiya Saoto
Tsutsui Hiroshi
Yamamoto Yoshihisa
Aisin Aw Co. Ltd.
Loud George A.
Marmor Charles A.
Parekh Ankur
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