Patent ID: 7267097
Filing Date: 2007-09-11
Classification: F02D,Y02T

Abstract:
1. A fuel injection system of an internal combustion engine provided with a common rail and fuel injectors connected to the common rail, performing fuel injection from each fuel injector at least the two times of prior injection and later injection during one cycle of the engine, and changing in fluctuation amount of the later injection with respect to a target value depending on a time interval from when the prior injection is performed to when the later injection is performed, said fuel injection system of an internal combustion engine provided with a storage device for storing a reference fluctuation amount of the later injection changing along with a reference fluctuation pattern along with an increase in said time interval when the rail pressure is a predetermined reference rail pressure and storing a contraction rate or expansion rate of the fluctuation pattern when contracting or expanding the fluctuation pattern of said fluctuation amount of the later injection when the rail pressure is not the reference rail pressure to overlay it on the reference fluctuation pattern, a calculation device for using said contraction rate or expansion rate to calculate said fluctuation amount of the later injection in accordance with the rail pressure from said reference fluctuation amount and time interval, and a control device for using the fluctuation amount calculated by said calculation device to control an injection amount to a target value.