Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1994-09-29
1996-11-12
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477143, 477150, F16H 6100
Patent
active
055734782
ABSTRACT:
A controller for an automatic transmission which reduces wear of frictional engagement elements and shortens gear change time even when a gear change jump is made. The controller of the present invention includes a first hydraulic servo to which oil is supplied to make a gear change jump, a second hydraulic servo to which oil is supplied to make a gear change to an intermediate gear stage, a limited supply oil circuit having an oil flow limiting element, a quick supply oil circuit bypassing the oil flow limiting element and a pressure governor for regulating a line pressure to supply oil at a controlled pressure to the quick supply oil circuit. An oil path switching valve switches oil supply, to the first hydraulic servo or the second hydraulic servo, between the limited supply oil circuit and the quick supply oil circuit. Accordingly, when a gear change jump is made, oil is supplied to the first hydraulic servo via the quick supply oil circuit and the operating pressure can be increased quickly, so that the gear change time is shortened.
REFERENCES:
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patent: 4722251 (1988-02-01), Sumiya et al.
patent: 4889015 (1989-12-01), Kondo
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patent: 5094130 (1992-10-01), Hirose et al.
patent: 5161434 (1992-11-01), Hayasaki
patent: 5397284 (1995-03-01), Matsumoto et al.
patent: 5501645 (1996-03-01), Taniguchi et al.
patent: 5505673 (1996-04-01), Tsukamoto et al.
Ando Masahiko
Hayabuchi Masahiro
Kano Toshihiro
Tsukamoto Kazumasa
Yamamoto Yoshihisa
Aisin Aw Co. Ltd.
Ta Khoi Q.
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