| 摘要 |
PROBLEM TO BE SOLVED: To enable an air-fuel mixture injection near a top dead center with a simple constituion, and improve fuel economy. SOLUTION: An air-fuel mixture chamber 7 and an air chamber 4 are formed in a housing H. The air chamber 4 communicates with an inside of a cylinder via a first communicating passage 3, and the air-fuel mixture chamber 7 communicates with the air chamber 4 via a second communicating passage. An approximately cylindrical piston 9 for pressure rise in which an end of the air chamber 4 side is radially enlarged is interposed between the air chamber 4 and the air-fuel mixture chamber 7. After air-fuel mixture generated inside the air-fuel mixture chamber 7 is compressed by the piston 9 for pressure rise, the air-fuel mixture is injected inside the cylinder from a nozzle 1.
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