FUEL INJECTION CONTROL APPARATUS FOR ENGINE

摘要

A fuel injection control apparatus for an engine, which makes an appropriate increasing correction to a fuel amount at fete time of restart after the stop period of the engine, thereby making it possible to cut down on the amounts of NOx emissions, is provided. The fuel injection control apparatus comprises an injection volume control unit for controlling a fuel injection volume a supplied oxygen amount detection unit for detecting a supplied oxygen amount, an activity determination unit for determining whether or not an exhaust purification catalyst is in an active state, and an amount increasing correction unit for making an increasing correction to the fuel injection volume in accordance with the detection results of the supplied oxygen amount detection unit and the determination results of the activity determination unit.

主权项

1. A fuel injection control apparatus for an engine equipped with an exhaust purification catalyst in an exhaust passage, comprising:
an injection volume control unit that controls a fuel injection volume injected from a fuel injection valve; a supplied oxygen amount detection unit that detects a supplied oxygen amount supplied to the exhaust purification catalyst during a period from cessation of fuel injection by the fuel injection valve until stoppage of the engine; an activity determination unit that determines whether or not the exhaust purification catalyst is in an active state, at a time of restart of the engine and an amount increasing correction unit that makes an amount increasing correction to the fuel injection volume injected from the fuel injection valve at the time of restart of the engine, in accordance with detection results of the supplied oxygen amount detection unit and determination results of the activity determination unit.