Automatic decompression device

专利名称：Automatic decompression device发明人：Tien-Ho Gau申请号：US09/093071申请日：19980608公开号：US06055952A公开日：20000502

摘要：An automatic decompression device for four-stroke engines comprises a camgear, a counterweight, and an acting body. The cam gear includes a cam surface and arecess containing the acting body, and the counterweight includes a plate with a guideslot. Besides, the recess pierces the cam surface. Since the acting body is engaged to theguide slot of the counterweight and there exist external forces acting on thecounterweight, the counterweight is forced to move the acting body upwardly ordownwards by the guidance of the plate and the limitation of the guide slot.

Consequently, the acting body is exposed beyond the cam surface or tucked into therecess. With the motion of the acting body, the opening and closing duty cycles of theintake and exhaust valves are biased. When the engine of the invention is static, the actingbody is exposed beyond the cam surface to partially release the pressure of the engine'scombustion chamber for manually starting the engine. When the engine of the inventionis rotated at a relatively high speed, the acting body is tucked into the recess to makethe engine's intake and exhaust valves working normally.

申请人：INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

代理机构：Pillsbury Madison & Sutro LLP

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