| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve low temperature startability in a cylinder injection type engine when alcohol fuel (100% alcohol or mixed fuel containing alcohol). Ž<P>SOLUTION: When alcohol concentration of the fuel is not less than prescribed concentration and cooling water temperature is not higher than prescribed temperature, it is judged that injected fuel is not easily gasified, start target fuel pressure is set to an appropriate value according to alcohol concentration of fuel and cooling water temperature, and fuel injection of a fuel injection valve 21 is started after raising actual fuel pressure to pressure close to the start target fuel pressure by a high pressure pump 31 in start of the engine 11. Although high pressure fuel is directly injected into a cylinder by the fuel injection valve 21 after fuel injection start, time from fuel injection to start of combustion is shortened to start combustion and accelerate gasification of injected fuel before much injected fuel adheres on a cylinder inside wall surface, a piston and the like by executing compression stroke injection in which fuel is injected in compression stroke during engine start or a prescribed period after engine start. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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