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1. 发明授权

US4484545A Hydraulically actuated exhaust valve for a reciprocating combustion engine 失效
标题翻译：用于往复式内燃机的液压致动排气阀
公开(公告)号：US4484545A
公开(公告)日：1984-11-27
申请号：US419522
申请日：1982-09-17
申请人： John G. Madsen
发明人： John G. Madsen
IPC分类号： F01K9/02 , F01L9/02 , F01L1/00
CPC分类号： F01L9/02 , F01L2003/258
摘要： The exhaust valve has a valve member which opens away from the combustion chamber of the engine cylinder and which is biased for opening by the gas pressure prevailing in the combustion chamber. The valve is kept closed by an opposed hydraulic pressure which in a holding chamber acts on a holding piston secured to the spindle of the valve member. When the valve is to be opened, the pressure in the holding chamber is relieved and one or more valve controlled flow passages are opened, through which hydraulic liquid flows from the holding chamber to a reservoir defined by a further piston secured to the valve spindle. The two pistons are preferably of substantially equal size. When the exhaust valve is to be closed a hydraulic pressure is applied to a substantially smaller closing piston which is also secured to the valve spindle. During the closing movement hydraulic liquid flows from the reservoir back to the holding chamber and after the closing movement that chamber is again connected to the hydraulic pressure which ensures that the valve member is maintained in its closed position against the gas pressure.
摘要翻译：排气阀具有阀构件，该阀构件从发动机气缸的燃烧室开放，并且通过燃烧室中的气体压力被偏压打开。阀门通过相对的液压保持关闭，在相对的液压下，保持室作用在固定在阀构件主轴上的保持活塞上。当阀打开时，保持室中的压力被释放，并且打开一个或多个阀控流动通道，液压液体通过该流路从保持室流向由固定到阀芯的另一个活塞限定的贮存器。两个活塞优选地具有基本相等的尺寸。当排气阀关闭时，液压被施加到也固定到阀芯的基本上较小的闭合活塞上。在闭合运动期间，液压液体从储存器流回到保持室，并且在闭合运动之后，室再次连接到液压，其确保阀构件相对于气体压力保持在其关闭位置。

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