Method for controlling the operation of the fuel injector in a fuel injection type internal combustion engine during a deceleration condition of the engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsHideo Miyagi, Toshio Suematsu
Life of this patent
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Abstract
An electronic fuel injection control internal combustion engine which is provided with a feedback control system for maintaining a predetermined constant idling speed and a system for controlling the operation of the fuel injector during the deceleration condition of the engine. A value of the rotational speed when the fuel injector is stopped or recovered is increased during the deceleration condition of the engine.
Claims7
Method for operating a fuel injector device in a computer controlled fuel injection type internal combustion engine during a fully closed position of throttle valve of the engine in which idling engine speed is controlled so that it is maintained to N.sub.F, said method comprising the steps of:
- (a) storing, in a memory unit of the electrical computer, a value corresponding to a first rotational speed N.sub.1 ;
- (b) storing, in the memory unit, a value corresponding to a second rotational speed N.sub.2 which is smaller than N.sub.1 and is larger than the idling rotational speed N.sub.F ;
- (c) storing, in the memory unit, a value corresponding to an increase .alpha. in the first rotational speed N.sub.1 ;
- (d) storing, in the memory unit, data corresponding to an increase .beta. in the second rotational speed of the engine N.sub.2 ;
- (e) detecting whether a predetermined period has lapsed or not from the start of the engine;
- (f) producing an electrical signal for stopping the operation of the fuel injector device when said period has not lapsed and when the rotational speed of the engine N is larger than N.sub.1 plus .alpha.;
- (g) producing an electrical signal for operating the fuel injector device when said period has not lapsed and when the rotational speed of the engine N is smaller than N.sub.2 plus .beta.;
- (h) producing the electrical signal for stopping the operation of the fuel injector when the period has lapsed and when the rotational speed of the engine N is larger than N.sub.1 ;
- (i) producing the electrical signal for operating the fuel injector when the period has lapsed and when the rotational speed of the engine N is smaller than N.sub.2 ;
- (j) repeating the above mentioned steps during fully closed position of the throttle valve of the engine.
Dependencies are inferred from the claim text.