公开(公告)号：US3953969A

公开(公告)日：1976-05-04

申请号：US465946

申请日：1974-05-01

申请人： Haruo Mori ,  Yukio Mizuno

发明人： Haruo Mori ,  Yukio Mizuno

IPC分类号： F01N3/30 ,  F02B1/04 ,  F02B47/08 ,  F02B75/02 ,  F02B75/10

CPC分类号： F02B47/08 ,  F01N3/30 ,  F02B1/04 ,  F02B2075/027 ,  Y02T10/121 ,  Y02T10/20

摘要： The valve-overlapping period of a spark ignition type, four stroke internal combustion engine extends within the range of 60.degree. to 90.degree. of crank angle with the valve overlapping period being generally equally divided to each side of the piston top dead center so that the pressure differential between the exhaust gas passage of the engine and the fuel and air intake passage causes the exhaust gas to counterflow from the exhaust gas passage to the combustion chamber and into the intake passage of the engine with the suction effect of piston descent being negligible when the piston is in the vicinity of top dead center. Secondary air supplied to the exhaust gas passage of the engine when the pressure in the exhaust gas passage is lower than atmospheric pressure during the valve-overlapping period causes the secondary air and exhaust gas mixture to mix with the fresh air and fuel mixture in the intake passage to preheat the fresh air and fuel mixture and subsequent recombustion within the combustion chamber of the engine together with the fresh mixture of fuel and primary air.

摘要翻译： 火花点火式四冲程内燃机的阀重叠周期在曲柄角度的60°至90°的范围内延伸，阀重叠周期大体上等于活塞上止点的每一侧，使得 发动机的废气通道与燃料和进气通道之间的压力差使得排气从排气通道逆流到燃烧室并进入发动机的进气通道，当活塞下降的吸入作用可忽略时，当 活塞处于上止点附近。 在气门重叠期间，当排气通道中的压力低于大气压力时，二次空气供应到发动机的废气通道，使得二次空气和废气混合物与进气口中的新鲜空气和燃料混合物混合 将新鲜空气和燃料混合物预热并随后在发动机的燃烧室内与燃料和初级空气的新鲜混合物一起重新燃烧。