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公开(公告)号:EP0738372B1
公开(公告)日:2000-02-02
申请号:EP95936634.5
申请日:1995-11-07
CPC分类号: B62D5/07 , F15B1/033 , F16H2061/305
摘要: An actuation system particularly for vehicular use in which a pump (10b) draws fluid from a reservoir (10a) to supply one or more first consumers such as a steering valve (50). One or more second consumers such as a clutch actuator (12) are actuated via a solenoid valve (12a) from an accumulator (10c) charged by the pump. The solenoid valve connects the or each second consumer (12) to the accumulator or to the reservoir thus actuating the second consumers. At accumulator pressure levels below a predetermined charge level the flow of fluid to the or each first consumer (50) is restricted to a level sufficient to ensure effective operation of the or each first consumer whilst generating a back pressure sufficient to ensure charging of the accumulator. This flow restriction may be achieved by solenoid valve (12a) or by a separate charging valve (20).
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公开(公告)号:EP0782675B1
公开(公告)日:2001-10-24
申请号:EP96924999.4
申请日:1996-07-19
CPC分类号: F16H61/0403 , F16H59/44 , F16H59/70 , F16H59/72 , F16H61/2807 , F16H61/30 , F16H63/46 , F16H2059/084 , F16H2059/085 , F16H2059/087 , F16H2059/6807 , F16H2061/2823 , Y10T74/19251
摘要: A ratio selector mechanism for the selection of the operative ratio in an associated synchromesh vehicle transmission in which a fluid pressure operated actuating means (14, 15) operates synchromesh units. The operating pressure of the actuating means is varied either mechanically or electronically during selection of a given ratio in the associated transmission or dependant on the ratio being selected in the associated transmission.
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