发明名称 |
Hydraulic control apparatus for vehicle power transmitting system having fluid coupling incorporating lock-up clutch |
摘要 |
A hydraulic control apparatus for a vehicle power transmitting system having a fluid coupling equipped with a lock-up clutch, and a transmission to which power is transmitted from an engine of the vehicle through the fluid coupling. The fluid coupling has an engaging chamber and a releasing chamber for engaging and releasing the lock-up clutch. The apparatus includes a discharge passage communicating with the engaging chamber, for normally draining the engaging chamber to a drain, to thereby normally release the lock-up clutch, and a rapid release valve connected to the discharge passage. The rapid release valve operates to by-pass the discharge passage to the drain therethrough, for thereby rapidly draining the engaging chamber to rapidly release the lock-up clutch. A lock-up pressure regulating valve is provided for regulating a lock-up clutch pressure applied to the fluid coupling, normally to a first value, and upon operation of the rapid release valve, to a second value higher than the first value.
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申请公布号 |
US5050715(A) |
申请公布日期 |
1991.09.24 |
申请号 |
US19900476350 |
申请日期 |
1990.02.07 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
ITOH, HIROSHI;MORISAWA, KUNIO;HABUCHI, RYOJI;SUGAYA, MASAMI;SOGA, YOSHINOBU |
分类号 |
F16H61/14;F16H61/662 |
主分类号 |
F16H61/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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