Fuel injection timing control device for an internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKaoru Ohtsuka, Mamoru Yoshioka
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Abstract
A fuel injection timing control device for an internal combustion engine. The device comprises a fuel injector for injecting fuel into the intake port of an engine cylinder and an fuel injection end-timing control system for controlling the fuel injection end-timing of the fuel injector so as to advance gradually, from a first crank angle in the intake stroke to a second crank angle before the intake stroke, according to the engine operating condition. Accordingly, when the fuel injection timing is changed, the amount of fuel which sticks or adheres in the intake port is gradually increased by a small amount, at each fuel injection, so that the air-fuel ratio of the mixture does not become so lean the drivability of the vehicle is deteriorated.
Claims12
A fuel injection timing control system for an internal combustion engine, comprising:
- a fuel injector for injecting fuel into an intake port;
- and
- a controller for controlling a fuel injection end-timing such that said end-timing is varied gradually from occurring at a time of a first crank angle which occurs during an intake stroke, to occurring at a time of a second crank angle which occurs before said intake stroke, in accordance with a current engine operating condition.
The fuel injection timing control system for an internal combustion engine, comprising:
- a fuel injector for injecting fuel into an intake port;
- a controller for changing an injection end-timing of said fuel injector from during an intake stroke to before said intake stroke according to an engine operating condition, wherein said controller increases an amount of fuel injected by said fuel injector to take account of an amount of fuel which sticks to a surface of said intake port under varying engine operating conditions.
Dependencies are inferred from the claim text.