专利内容由知识产权出版社提供
专利名称：HYDRAULICALLY CONTROLLED ACTUATOR
FOR ACTUATING A VALVE
发明人：DIEHL, UDO,MISCHKER, KARSTEN,ROSENAU,
BERND,HAMMER, UWE,REIMER,STEFAN,BEUCHE, VOLKER,LANG, PETER
申请号：EP02752978.3申请日：20020625公开号：EP1427917A1公开日：20040616
摘要：Disclosed is a hydraulically controlled actuator (16) for actuating a valve (10),especially a gas exchange valve (10) in a combustion cylinder (11) of an internalcombustion engine, which has two fluid-filled pressure chambers (21, 22) with
controllable chamber volumes and a sealable adjusting piston (18) defining the pressurechambers (21, 22) by means of opposing piston sides and acting upon the valve (10),provided with a closing active surface impinged upon by the pressure of the fluid in thepressure chambers (21, 22) in order to close said valve (10), in addition to an openingactive surface which is impinged upon by fluid pressure so that the valve (10) can beopened. In order to influence the kinematics of the opening and closing movements ofthe valve (10), the adjusting piston (18) is embodied in such a way that the surface area ofat least one of the two active surfaces can be modified along the displacement path ofthe adjusting piston (18).
申请人：ROBERT BOSCH GMBH
地址：Postfach 30 02 20 70442 Stuttgart DE
国籍：DE
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