| 摘要 |
PURPOSE: A gasoline engine system is provided to improve the stability of self ignition combustion by differently controlling the lift amount and timing of first and second intake valves to form uniform mixed gas. CONSTITUTION: A gasoline engine system comprises an injector, a spark plug, intake valves, exhaust valves(120), a variable mechanism, and a controller. The injector is located in the upper center portion to directly inject fuel into a combustion chamber in which a piston is installed. The spark plug is installed corresponding to the injector in order to create direct spark in the combustion chamber. The intake valves(100,110) are installed in an intake port for drawing air into the combustion chamber. The exhaust valves are installed in an exhaust port for discharging the combustion gas of the combustion chamber. The variable mechanism controls the lifting amount and opening degree of the intake and exhaust valves, wherein the lifting amount and opening degree of the intake valves are controlled differently.
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