Fuel injection system for internal combustion engine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsTsuguo Watanabe, Tomomi Yuhara
Life of this patent
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Abstract
A fuel injection system for an internal combustion engine has an upstream fuel injector provided upstream from the throttle valve and a downstream fuel injector provided downstream therefrom. A device is provided for determining a fuel injection quantity of the upstream and downstream fuel injectors. A sensor detects the intake temperature TA on the upstream side from an injection area of the upstream fuel injector. A device is provided for seeking an intake temperature correction factor KTA on the basis of the intake temperature TA and a fuel injection quantity of the upstream fuel injector. At least one of the fuel injection quantities due to the upstream and downstream fuel injectors is corrected on the basis of the intake temperature correction factor KTA.
Claims18
A fuel injection system for an internal combustion engine having an intake pipe equipped with a throttle valve, an upstream fuel injector provided upstream from the throttle valve and a downstream fuel injector provided downstream from the throttle valve, said fuel injection system comprising:
- means for determining fuel injection quantities of the upstream and the downstream fuel injectors;
- means for detecting an intake temperature (TA) on the upstream side from an injection area of the upstream fuel injector;
- means for determining an intake temperature correction factor (KTA) on the basis of said intake temperature (TA) and the fuel injection quantity of one of the upstream and the downstream fuel injectors;
- and
- means for correcting at least one of said fuel injection quantities of the upstream and downstream fuel injectors on the basis of said intake temperature correction factor (KTA).
A method of injecting fuel for an internal combustion engine having an intake pipe equipped with a throttle valve, an upstream fuel injector provided upstream from the throttle valve and a downstream fuel injector provided downstream from the throttle valve, said method comprising the steps of:
- determining fuel injection quantities of the upstream and the downstream fuel injectors;
- detecting an intake temperature (TA) on the upstream side from an injection area of the upstream fuel injector;
- determining an intake temperature correction factor (KTA) on the basis of said intake temperature (TA) and the fuel injection quantity of one of the upstream and the downstream fuel injectors;
- and
- correcting at least one of said fuel injection quantities of the upstream and downstream fuel injectors on the basis of said intake temperature correction factor (KTA).
Dependencies are inferred from the claim text.