Control system for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorJunichi Mori
Life of this patent
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Abstract
In an internal combustion engine equipped with an injector for cylinder-inside injection to inject fuel into a cylinder and an injector for intake port injection to inject fuel into an intake port, both the injectors being switched for use depending upon operating conditions, wherein when an operating condition range using either one of the first or the second injector is switched to an operating condition range using the other one thereof, the amount of fuel to be injected by the either one of the first or the second injector is gradually decreased and the amount of fuel to be injected by the other one is gradually increased over a predetermined period during the switching. Further, at the time of the switching, at least one of ignition timing and throttle opening angle is gradually varied.
Claims10
A control system for an internal combustion engine equipped with a first injector for cylinder-inside injection to inject fuel into a cylinder at a high load, and a second injector for intake port injection to inject fuel into an intake port at low and medium loads, both of the first and second injectors being switched for use depending on operating conditions, the control system comprising:
- a control unit which performs a switching control in such a way that when an operating condition range using either one of the first or the second injector is switched to an operating condition range using the other one thereof, the amount of fuel to be injected by the either one of the first or the second injector is gradually decreased and the amount of fuel to be injected by the other one is gradually increased over a predetermined period during the switching.
A control system for an internal combustion engine equipped with a first injector for cylinder-inside injection to inject fuel into a cylinder and a second injector for intake port injection to inject fuel into an intake port, comprising:
- a detector to detect an operating condition of the internal combustion engine;
- a switching section to switch from a fuel injection by either one of the first or the second injector to a fuel injection by the other one depending on the operating condition detected by the detector;
- and
- a fuel injection quantity changing section to gradually decrease the amount of fuel to be injected by the either one of the first or the second injector while increasing the amount of fuel to be injected by the other one over a predetermined period during the switching by the switching section.
A control method for an internal combustion engine equipped with a first injector for cylinder-inside injection to inject fuel into a cylinder, and a second injector for intake port injection to inject fuel into an intake port, the control method comprising the steps of:
- detecting an operating condition of the internal combustion engine;
- switching from a fuel injection by either one of the first or the second injector to a fuel injection by the other one depending on the detected operating condition;
- and
- gradually decreasing the amount of fuel to be injected by the either one of the first or the second injector while gradually increasing the amount of fuel to be injected by the other one over a predetermined period during the switching.
Dependencies are inferred from the claim text.