| 摘要 |
An electronic control apparatus adjusts the pressure such that the fuel supply pressure of a high-pressure fuel supply system is reduced when in a low load mode corresponding to a low required injection quantity. When the operating status of the engine is shifted from a low load to a high load, the fuel supply pressure is boosted again. When determination is made that the current fuel supply pressure is lower than the target fuel supply pressure by at least a predetermined pressure C, the injection quantity ratio of the in-cylinder injector is set lower to reduce the required injection quantity of the in-cylinder injector. Accordingly, noise generated from the high-pressure fuel supply system can be minimized. Further, detrimental effects caused by insufficient fuel supply pressure of the high-pressure fuel supply system can be suppressed when the engine operating status is shifted from a low load to a high load.
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