Fuel injection control device

Abstract

A fuel injection control device is provided with: a mode switching instruction unit (312) that instructs to switch from a first mode in which fuel is injected into a combustion chamber (105) to a second mode in which fuel injection into the combustion chamber (105) is stopped, and to switch from the second mode to the first mode; an injection availability determination unit (313) that, when switching from the second mode to the first mode is instructed, determines whether or not injection of fuel in accordance with the injection target value calculated by the target value calculation unit (311) can be performed within the injectable region; and a target value correction unit (314) that, when a target number of injections included in the injection target values is a plurality of times and it is determined that fuel injection corresponding to the injection target values cannot be performed, reduces the target number of injections and corrects the injection target values, and when the injection target values are corrected by the target value correction unit, reduces the target number of injections and corrects the injection target values. The fuel injection unit (12) is controlled so as to inject fuel on the basis of the corrected injection target value.

Description

technical field [0001] The present invention relates to a fuel injection control device for controlling fuel injection of a direct injection internal combustion engine. Background technique [0002] As such a device, conventionally, there is known a device that not only calculates the fuel injection time in the intake stroke but also calculates the fuel injection time in the exhaust stroke in consideration of the load of calculation processing related to injection when injecting fuel in the intake stroke. The calculation of the injection time of the fuel starts the fuel injection. Such a device is described in Patent Document 1, for example. [0003] However, in a device having a function of stopping fuel injection when a predetermined fuel supply stop condition is met while the vehicle is running, for example, when the intake stroke is reset from the fuel supply stop condition and fuel injection is restarted, sometimes It is difficult to perform injection during the intak...

AI Technical Summary

Problems solved by technology

[0003] However, in a device having a function of stopping fuel injection when a predetermined fuel supply stop condition is met while the vehicle is running, for example, when the intake stroke resets from the fuel supply stop condition and restarts fuel injection, there may be It is difficult to inject during the intake stroke, as a result, the timing of reset from the stop of fuel supply is delayed

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