| 摘要 |
PROBLEM TO BE SOLVED: To enhance a combustibility of a stratified charge combustion and a homogeneous combustion by constituting an air-supplying means by an air injection valve for directly injecting an air to a combustion chamber. SOLUTION: An air supplying means for supplying an air to a combustion chamber in a suction stroke is constituted by an air injection valve 7 for directly supplying a high pressure air to the combustion chamber. By this constitution, when the fuel injection valve 6 injects a fuel in a compression stroke during a stratified charge combustion, the injected fuel is directed to a cavity combustion chamber 10 and a fuel injection valve 6 is exactly mounted on the cavity combustion chamber 10 at a received angle. Whereas, the air injection valve 7 is mounted at an angle such that an air injected in the suction stroke forms, for example, a swirl laterally directed by rotating in a right direction as an arrow and an fuel injected in a compression stroke in which the swirl exists in the cavity combustion chamber 10 is exactly conveyed around an ignition plug. The mounting angle of the air injection valve 7 and the fuel injection valve 6 can intensionally set an interference of the fuel and the air and a granulation and a stratification of the fuel can be carried out.
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