| 摘要 |
PURPOSE:To raise the compression ratio of an engine as well to improve the extent of thermal efficiency, by dividing a flow direction of fresh air to be inhaled in a cylinder via plural suction valves into a center flow to flow in a cylinder center area and an outside flow to be turned along a cylinder peripheral wall, and feeding this center flow with fuel. CONSTITUTION:In case of a device which installs two suction valves A and B at each cylinder, an injection nozzle D is set up in a suction passage H to be opened or closed by the suction valve A. This suction passage H checks the diffusion of an air-fuel mixture flowing in with a piston going down to the utmost, and it forms the mixture so as to make it straightly flowable into a cylinder central area as an axial flow E so as to make swirl turbulence or the like hard to occur. And, a suction passage K to be opened or closed by the suction valve B is formed as giving directional properties to a passage form so as to form a flow along a cylinder inner wall, while this suction valve B is constituted as a shrouded valve for forming a peripheral wall swirl flow. In addition, each on-off timing of these of these suction valves A and B is made alterable by a variable mechanism F.
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