Method of controlling the injection timing in an internal combustion engine

摘要

A control method for controlling the timing of fuel injection in a fuelling system for an engine comprising a fuel injector supplied with fuel from a source of fuel at high pressure, comprises the steps of varying a drive current (A) which is supplied to the fuel injector at a first time (T1) so as to initiate or terminate a primary injection of fuel and monitoring the pressure of fuel within the source (C) so as to detect when a variation in fuel pressure occurs. A time delay is measured ( DELTA T), which represents the difference in time between the first time and a second, later time (T2) at which a variation in fuel pressure within the source is detected. The measured time delay is used to adjust the time at which the drive current is varied so as to initiate or terminate a subsequent injection of fuel, thereby to ensure initiation or termination of the subsequent injection of fuel occurs at a required time. <IMAGE>