Patent ID: 7159389
Filing Date: 2007-01-09
Classification: F02D,Y02T

Abstract:
1. An engine fuel injection control apparatus for an engine comprising: an excess air ratio control section configured to control an excess air ratio to a target excess air ratio that is determined based on an engine operating condition of the engine; a fuel injection timing control section configured to control a fuel injection timing to a target fuel injection timing that is determined based on the engine operating condition; an actual excess air ratio computing section configured to compute an actual excess air ratio of the engine; and a fuel injection timing adjustment section configured to adjust the fuel injection timing to obtain an adjusted fuel injection timing by interpolating in accordance with a ratio of the actual excess air ratio with respect to the target excess air ratio in effect before the adjustment in the target excess air ratio and the target excess air ratio that will take effect after the adjustment in the target excess air ratio such that the fuel injection timing is concurrently adjusted in a direction that corresponds to a direction of change in the actual excess air ratio when an amount of adjustment in the target excess air ratio is larger than a prescribed value, the fuel injection timing adjustment section being further configured to adjust the fuel injection timing when rich spike control is being executed for regenerating a NOx trapping catalytic converter provided in an engine exhaust system.