Patent ID: 6189514
Filing Date: 2001-02-20
Classification: F02B,F02D,F02M,Y02T

Abstract:
An electronic fuel injection apparatus which performs a feedback control to a fuel injection timing of a fuel injection pump for a diesel engine through a timing control valve opened/closed by a pulse signal a duty ratio of which is controlled comprising;means for detecting a driving state of the engine,means for detecting an actual fuel injection timing, anda computing unit for computing from the driving state of the engine a basic fuel injection timing, a target fuel injection timing, and a basic duty ratio corresponding to the basic fuel injection timing, to determine a final duty ratio for controlling the timing control valve by adding, to the basic duty ratio, a present final feedback correction quantity obtained by adding, to a last final feedback correction quantity, a present feedback correction quantity which is computed according to a difference between the actual fuel injection timing and the target fuel injection timing;the computing unit stopping control of the timing control valve when the time during which the present final feedback correction quantity reaches a lower limit or upper limit and also the difference is outside a predetermined range and lasts for a predetermined time.