Fuel injection control system
AssigneeNissan Motor Co., Ltd.
InventorsFukashi Sugasawa, Haruhiko Iizuka
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Abstract
A fuel injection control system is disclosed for an internal combustion engine having fuel injectors. The system comprises fuel cut-off means operable for rendering some of the fuel injectors inoperative only when the engine speed exceeds a first predetermined value during engine deceleration and for rendering the remaining fuel injectors inoperative only when the engine speed exceeds a second predetermined value higher than the first predetermined value during engine deceleration. Control means is provided for increasing the second predetermined value when rapid engine deceleration occurs.
Claims8
A fuel injection control system for use with an internal combustion engine having fuel injectors, comprising:
- (a) means for providing a fuel injection pulse signal, corresponding to the rate of air flow to said engine, to operate said fuel injectors;
- (b) a signal generator for providing a first signal when the engine speed is above a first predetermined value and for providing a second signal when the engine speed is above a second predetermined value higher than said first predetermined value;
- (c) cut-off means responsive to said first signal for cutting off the fuel injection pulse signal to a predetermined number of said fuel injectors during engine deceleration and responsive to said second signal for cutting off the fuel injection pulse signal to the remaining fuel injectors during engine deceleration;
- and
- (d) control means for increasing said first predetermined value during rapid engine deceleration.
Dependencies are inferred from the claim text.