专利名称：Compression release mechanism
发明人：Kaufman, Vernon R.,Guntly, Thomas G.,Kelly,
William C.
申请号：EP80302861.2申请日：19800819公开号：EP0024871A2公开日：19810311
专利附图：
摘要：An automatic compression release mechanism for an internal combustionengine wherein first and second opposed cantilevered ends of a centrally supportedflexible plate forms two independently operating valves to respectively control serially
connected inlet and outlet ports of a valve chamber forming a part of a compressionrelease passageway connecting the combustion chamber of the engine with a zone oflower pressure such as the cylinder sidewall exhaust port of a two-cycle engine. Thevalves are each one-way check valves operating oppositely to one another. The valvecontrolling the outlet port is normally biased to an open position and remains openwhen the engine is turned over at the relatively slow cranking speeds normally used tostart the engine, relieving somewhat engine compression, thereby facilitating the startingof the engine. The outlet valve is flexed to a closed position in response to a rapidpressure build-up in the chamber caused by ignition of the fuel-air mixture in the enginecombustion chamber, thereby sealing the compression release passage after the enginestarts. A restricted passageway from the compression release chamber to the zone oflower pressure, such as the cylinder sidewall exhaust port, which passageway is
independent of the chamber valves, slowly diminishes the chamber pressure to releaseeach valve to return to its respective open position a predetermined time after theengine stops running. The restricted passageway and the outlet port of the compressionrelease chamber may both be connected to the cylinder sidewall exhaust port by ahollow interior portion of the engine piston pin.
申请人：TECUMSEH PRODUCTS COMPANY
地址：100 East Patterson Street Tecumseh Michigan 49286 US
国籍：US
代理机构：Webb, Frederick Ronald (GB)
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