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21. 发明授权

US4252092A Compression release mechanism 失效
标题翻译：压缩释放机制
公开(公告)号：US4252092A
公开(公告)日：1981-02-24
申请号：US71852
申请日：1979-09-04
申请人： Vernon R. Kaufman , Thomas G. Guntly , William C. Kelly
发明人： Vernon R. Kaufman , Thomas G. Guntly , William C. Kelly
IPC分类号： F02D15/00 , F01L3/20 , F01L13/08 , F02B63/02 , F02B75/02 , F02N19/00
CPC分类号： F02N19/004 , F01L13/08 , F01L3/205 , F02B63/02 , F02B2075/025 , Y10T137/7843
摘要： An automatic compression release mechanism for an internal combustion engine wherein first and second opposed cantilevered ends of a centrally supported flexible plate forms two independently operating valves to respectively control serially connected inlet and outlet ports of a valve chamber forming a part of a compression release passageway connecting the combustion chamber of the engine with a zone of lower pressure such as the cylinder sidewall exhaust port of a two-cycle engine. The valves are each one-way check valves operating oppositely to one another. The valve controlling the outlet port is normally biased to an open position and remains open when the engine is turned over at the relatively slow cranking speeds normally used to start the engine, relieving somewhat engine compression, thereby facilitating the starting of the engine. The outlet valve is flexed to a closed position in response to a rapid pressure build-up in the chamber caused by ignition of the fuel-air mixture in the engine combustion chamber, thereby sealing the compression release passage after the engine starts. A restricted passageway from the compression release chamber to the zone of lower pressure, such as the cylinder sidewall exhaust port, which passageway is independent of the chamber valves, slowly diminishes the chamber pressure to release each valve to return to its respective open position a predetermined time after the engine stops running. The restricted passageway and the outlet port of the compression release chamber may both be connected to the cylinder sidewall exhaust port by a hollow interior portion of the engine piston pin.
摘要翻译：一种用于内燃机的自动压缩释放机构，其中中央支撑的柔性板的第一和第二相对的悬臂端形成两个独立操作的阀，以分别控制形成压缩释放通道的一部分的阀室的串联连接的入口和出口连接具有较低压力区域的发动机的燃烧室，例如两冲程发动机的气缸侧壁排气口。这些阀门是相互相对操作的单向止回阀。控制出口的阀门通常被偏压到打开位置，并且当发动机以通常用于启动发动机的相对较慢的起动速度翻转时保持打开，减轻了一些发动机的压缩，从而有助于起动发动机。响应于由于发动机燃烧室中的燃料 - 空气混合物的点燃引起的室中的快速压力积聚，出口阀弯曲到关闭位置，从而在发动机起动之后密封压缩释放通道。从压缩释放室到低压区域的限制通道，例如气缸侧壁排气口，该通道独立于室阀，缓慢地减小室压力以释放每个阀，以使其返回到其相应的打开位置预定的发动机停止运行后的时间。压缩释放室的限制通道和出口可以通过发动机活塞销的中空内部连接到气缸侧壁排气口。

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