FUEL INJECTION DEVICE FOR ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel injection device for an engine capable of preventing knock sounds by rapidly decreasing a common rail pressure without influencing an engine power performance and so on.

SOLUTION: The fuel injection device for engine includes: a fuel injection valve; a common rail for storing the fuel injected from the fuel injection valve; a setting means (a control unit) of a target common rail pressure for setting the target common rail pressure in accordance with an engine operating state; and a fuel supply means (a high pressure fuel pump and a control unit) for supplying the fuel to the common rail such that the target common rail pressure is the pressure set by the setting means of the target common rail pressure, and the device includes an injection control means (a control unit) for performing a post-injection at a predetermined timing after a main injection when decreasing a speed.

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