发明授权
- 专利标题: Two-cycle internal combustion engine
- 专利标题(中): 双循环内燃机
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申请号: US59603申请日: 1987-06-08
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公开(公告)号: US4732118A公开(公告)日: 1988-03-22
- 发明人: Toshio Tanahashi , Norihiko Nakamura , Michiaki Uzihashi , Hiroshi Noguchi , Toshio Ito , Toyokazu Baika , Katsuhiko Hirose , Kingo Horii
- 申请人: Toshio Tanahashi , Norihiko Nakamura , Michiaki Uzihashi , Hiroshi Noguchi , Toshio Ito , Toyokazu Baika , Katsuhiko Hirose , Kingo Horii
- 申请人地址: JPX
- 专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址: JPX
- 优先权: JPX61-156284 19860704
- 主分类号: F02B1/04
- IPC分类号: F02B1/04 ; F02B11/00 ; F02B17/00 ; F02B23/08 ; F02B25/00 ; F02B25/14 ; F02B27/02 ; F02B31/00 ; F02B31/02 ; F02B31/08 ; F02B75/02 ; F02B75/18 ; F02F1/42 ; F02M25/07
摘要:
A two-cycle internal combustion engine comprises a cylinder head having an intake port and two exhaust ports opened to a combustion chamber, to which compressed fresh air is introduced via an intake valve. The intake valve and two exhaust valves are operated in response to a crank angle. One of the exhaust valves is opened earlier than the other exhaust valve and the intake valve when the speed of the downward movement of the piston is relatively high, such that a part of exhaust gas in the one exhaust port flows back to the combustion chamber in that condition. An exhaust gas swirl rotating around a cylinder axis is formed when the exhaust gas flows back and the fresh air is slowly introduced onto the exhaust gas swirl in that condition.