Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Patent
1996-12-12
1998-07-14
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
F16H 566
Patent
active
057795851
ABSTRACT:
To achieve a predetermined speed by engaging or releasing friction engagement elements of an auxiliary shift mechanism, a fluid pressure changeover valve is switched to a position for communication between a regulated pressure input port and an output port, so that regulated fluid pressure from a pressure regulating valve is supplied through second shift mechanism-side shift valves to the friction engagement elements of the auxiliary shift mechanism to be engaged or released. This position switch of the changeover valve also connects a line pressure input port to an output port whereby line pressure is supplied to the main shift mechanism-side shift valves to maintain the main shift mechanism in a predetermined speed state. To achieve a predetermined speed by a shift in the main shift mechanism, the regulated pressure input port is connected to the output port providing communication with the main shift mechanism shift valves, and the line pressure input port becomes connected to the output port providing communication with the auxiliary shift mechanism shift valves.
REFERENCES:
patent: 5342253 (1994-08-01), Mizobe et al.
patent: 5605516 (1997-02-01), Tsukamoto et al.
patent: 5634864 (1997-06-01), Niyama et al.
Hayabuchi Masahiro
Nishida Masaaki
Suzuki Akitomo
Tsukamoto Kazumasa
Yamamoto Yoshihisa
Aisin Aw Co. Ltd.
Wright Dirk
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