DEVICE FOR CONTROLLING FUEL INJECTION

摘要

PROBLEM TO BE SOLVED: To obtain drivability equivalent to that in normal drive by keeping acceleration performance of engine torque associated with rise delay of supercharging pressure equivalent to that in normal operation when regenerating a DPF in a vehicle mounted with a diesel engine with a turbocharger and a DPF.

SOLUTION: This device for controlling fuel injection includes: a supercharging pressure detection means 21 to detect or estimate supercharging pressure of a turbocharger 2; a fuel injection amount calculation means 31 to calculate the upper-limit value of a fuel injection amount in response to supercharging pressure of the turbocharger 2 detected or estimated by the supercharging pressure detection means 21 so that that in the normal operation emphasizing thermal efficiency of a diesel engine 1 is set larger than that in regeneration operation of a DPF 3; and a fuel injection control means 33 to execute fuel injection at a smaller fuel amount out of the fuel amount requested by a driver and the upper-limit value of the fuel injection amount calculated by the fuel injection amount calculation means 31.

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