公开(公告)号：US5230314A

公开(公告)日：1993-07-27

申请号：US901579

申请日：1992-06-19

申请人： Yoshitaka Kawahara ,  Masaaki Nakachi ,  Yoshihide Nakatani

发明人： Yoshitaka Kawahara ,  Masaaki Nakachi ,  Yoshihide Nakatani

IPC分类号： F01L7/02 ,  F02B3/06 ,  F02B33/26 ,  F02B33/30 ,  F02B75/02

CPC分类号： F02B33/26 ,  F01L7/022 ,  F02B33/30 ,  F02B2075/027 ,  F02B3/06

摘要： A 4-cycle internal combustion engine including a crankcase, a cylinder, a cylinder head, a piston adapted to reciprocate within the cylinder, a combustion chamber formed by the piston, the cylinder and the cylinder head, and a crankshaft connected to the piston via a connecting rod, is improved in order to enhance its thermal efficiency, to reduce exhaust emissions and to make it possible to operate the engine while the engine is in any attitude. The improvements reside in an intake passage and an exhaust passage provided in the cylinder head, a rotary valve rotating synchronously with the crankshaft at a speed one-half of that of the latter for placing the intake passage and the exhaust passage in communication with the cylinder during an intake stroke and an exhaust stroke of the piston, respectively, a check valve through which the intake passage communicates with the interior of the crankcase so that only flow is allowed from the crankcase towards the intake passage, and a carburetor device for feeding a fuel mixture of air, fuel and lubricant oil into the crankcase. The suction of the fuel mixture into the crankcase chamber as well as the feeding of the fuel mixture within the crankcase to the intake passage are made possible by the variation in pressure within the crankcase chamber caused by the reciprocation of the piston.

摘要翻译： 一种四冲程内燃机，包括曲轴箱，气缸，气缸盖，适于在气缸内往复运动的活塞，由活塞，气缸和气缸盖形成的燃烧室以及连接到活塞的曲轴通过 改进了连杆，以提高其热效率，减少废气排放，并且使得在发动机处于任何姿态下可以操作发动机。 改进在于设置在气缸盖中的进气通道和排气通道，与曲轴同步旋转的旋转阀，其速度是后者的一半，用于将进气通道和排气通道与气缸连通 在活塞的进气冲程和排气冲程期间分别具有止回阀，进气通道通过该止回阀与曲轴箱的内部连通，使得仅允许从曲轴箱流向进气通道的流动，以及用于供给 将空气，燃料和润滑油的燃料混合到曲轴箱中。 通过由活塞的往复运动引起的曲轴箱室内的压力变化，使燃料混合物进入曲轴箱室中的吸入以及曲轴箱内的燃料混合物进入进气通道成为可能。