| 摘要 |
PURPOSE:To form a sure advance two-stage injection system by changing a diesel engine fuel injection valve mechanism. To shorten the ignition delay phenomenon of a main diffusion fuel group, suppress the rising rate of the combustion pressure, improve the air utilization factor, and reduce the exhaust gas noxious constituent by forming a small-scale reaction area with an advance fuel group. CONSTITUTION:An auxiliary needle valve 4 is provided in a main needle valve 3 to form an auxiliary fuel injection circuit, fuel is fed into a combustion chamber from the auxiliary fuel injection circuit prior to the fuel injection feed, and a reaction area is formed in the combustion chamber prior to a main fuel group.
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