METHOD OF INTERRUPTING FUEL INJECTION INTO AN INTERNAL-COMBUSTION ENGINE DURING DECELERATION

摘要

A process whereby fuel injection is interrupted in response to detection of a deceleration and injection is again ordered when a threshold linked to the engine speed is reached. The engine speed (N) or period of rotation (T) is measured from consecutive equal intervals or angles of rotation. A difference ( DELTA T, DELTA N) is then computed between the value of the last measured speed or period and the value seen through a high-pass filter of the speed or period measured at the preceding interval. This difference ( DELTA T, DELTA N) is compared with a fixed threshold (S) and if an engine deceleration condition is detected, fuel injection is again ordered when the difference ( DELTA T, DELTA N) is greater than the threshold (S).