Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Single impeller-turbine type fluid circuit divides or...
Patent
1996-08-15
1998-06-09
Marmor, Charles A.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Single impeller-turbine type fluid circuit divides or...
475 44, 475 48, 474 28, F16H 900
Patent
active
057625760
ABSTRACT:
A hydraulic control apparatus for a continuously variable transmission includes an inhibit valve that blocks the supply of hydraulic pressure to a reverse-drive brake during forward movement, and an inhibit solenoid valve that relieves the hydraulic pressure in a fluid passage acting on a spool of the inhibit valve so as to move the spool to the closed side and also relieves the hydraulic pressure in another fluid passage acting on a high-pressure regulator valve to urge the same to the low-pressure side, thereby increasing the high fluid pressure. This arrangement is able to improve the transient response of the control apparatus without providing additional pressure control valves as done in the conventional apparatus. The control apparatus can be manufactured with reduced number of components and at a relatively low cost.
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Aoki Takashi
Kajikawa Kaoru
Honda Giken Kogyo Kabushiki Kaisha
Kwon Peter T.
Marmor Charles A.
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