Patent ID: 7644701
Filing Date: 2010-01-12
Classification: F02D,Y02T

Abstract:
1. A fuel injection control apparatus in an internal combustion engine, the engine having cylinders, fuel injection portions, and a signal rotor, the fuel injection portions inject fuel to be burned in the cylinders, the signal rotor having a no-tooth portion and a plurality of tooth portions, and the tooth portions including a following tooth portion that is arranged adjacent to and follows the no-tooth portion, the control apparatus comprising: a signal output portion outputting signals in correspondence to respective detections of the tooth portions and the no-tooth portion; a control portion controlling the fuel injection portions in such a manner as to inject the fuel after a preset waiting period has elapsed, the preset waiting period being previously set on the basis of the signal, and wherein a lime point, at which the signal output portion actually outputs a signal indicating a start point or an end point of a detection of the no-tooth portion or a start point or an end point of the detection of the following tooth portion, is deviated due to the existence of the no-tooth portion; and a correcting portion that corrects the preset waiting period by an amount corresponding to the deviation in the case that the control portion controls the fuel injection portion in such a manner as to inject the fuel after a preset waiting period, which has been previously set on the basis of the signal corresponding to the detection of the start point or the end point has elapsed.