PURPOSE: To improve ignitionability and combustibility remarkably by providing a closing valve for fuel injection in front of a fuel injection valve so as to face to a combustion chamber, and a pressurized air injection nozzle to feed the pressurized air into the combustion chamber.
CONSTITUTION: An engine 1 has a combustion chamber 5 formed between a piston 3 and a cylinder head 4. A closing valve 13 for fuel injection is provided in front of a fuel injection valve 14 so as to face to said chamber 5. A pressurized air injection nozzle 15 is provided in the rear of said closing valve 13. In a low load operating range, the fuel is injected through the fuel injection valve 14 at the end of a compression stroke, and the pressurized air is supplied through said injection nozzle 15. Thus a rich mixture can be effectively stratified near an ignition plug 12 to improve ignitionability and combustibility remarkably.
TANAKA HIDEKI
MARUHARA MASASHI
NAGAO AKIO
NAKAGAWA TADASHI
| JPS62165527A | 1987-07-22 |
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