Device for control of a hydraulically actuatable s

专利名称：Device for control of a hydraulically

actuatable shifting element

发明人：Thilo Schmidt,Georg Gierer,Klaus

Steinhauser

申请号：US107810申请日：20030825公开号：US069033B2公开日：20050614

专利附图：

摘要：A device for control of a hydraulically actuatable shifting element of a motorvehicle transmission, having one clutch piston which defines, with a first surface, a

hydraulically pressurizable piston space and, with a second surface of different size, ahydraulically pressurizable reset space and comprising a first clutch valve associated withthe piston space, a second clutch valve associated with the reset space and a holdingvalve associated with the reset space. The valves can be moved according to a controlpressure adjusted by a pressure adjuster, a change between a pressurization of theclutch piston on the piston space side and on the reset space, side being performed as acontrol function so that the clutch piston on its surface facing the reset space ispressurized in an unshifted state of the shifting element and is discharged in a shiftedstate of the shifting element.

申请人：Thilo Schmidt,Georg Gierer,Klaus Steinhauser

地址：Meckenbeuren DE,Kressbronn DE,Kressbronn DE

国籍：DE,DE,DE

代理机构：Davis & Bujold, P.L.L.C.

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