| 摘要 |
PROBLEM TO BE SOLVED: To reduce white smoke which may increase engine noises during warming-up until temperature of engine cooling water is sufficiently heated after cold starting. SOLUTION: High pressure fuel pressurized by a fuel pump 1 is stored in a high pressure accumulator 3, supplied to an injector 9 through a changeover valve 5 and a fuel passage 10a, and stored in a low pressure accumulator 4 connected to the fuel passage 10a. An electronic control unit 8 so controls the changeover valve 5 as to pass the fuel in the high pressure accumulator 3 to the low pressure accumulator 4, while opens a pressure control valve 34 so as to obtain fuel pressure of a preset value in the low pressure accumulator 4. The ECU 8 divides engine starting into a normal starting and a low temperature starting according to the temperature of engine cooling water. In the low temperature starting, only the fuel pressure in the low pressure accumulator 4 is set higher than the normal starting. The injector 9 alone is opened for performing initial injection. The changeover valve 5 is opened during the opening of the injector 9 for performing main injection. It is possible to prevent generation of white smoke and reduce combustion noises.
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