发明名称 |
Pressure control device for the actuation of a clutch or brake |
摘要 |
A hydraulic control device for the pressurization of a clutch or the like for a transmission operable under load comprises a spool-type valve displaceable in one direction to pressurize the clutch and in the opposite direction to vent the same. The valve spool operates with a damping piston which receives the clutch pressure buildup and acts against a control piston which, in turn, is displaced by an operative valve. According to the invention, the pressure head is maintained substantially constant by providing a sleeve or bushing within the damping piston chamber which bears against the spool by a spring and which can be biased by a spring between the damping piston and the sleeve.
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申请公布号 |
US4469011(A) |
申请公布日期 |
1984.09.04 |
申请号 |
US19810293989 |
申请日期 |
1981.08.18 |
申请人 |
ZAHNRADFABRIK FRIEDRICHSHAFEN, AG. |
发明人 |
LOEFFLER, ALFONS |
分类号 |
F16H61/06;(IPC1-7):F15B13/04 |
主分类号 |
F16H61/06 |
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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