Control system for internal combustion engine
AssigneesToyota Jidosha Kabushiki Kaisha, Yamaha Motor Co., Ltd.
InventorsTaketo NAGASAKI, Daijiro TANAKA, Kouji TAKASU
Life of this patent
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Abstract
The center injection engine is an engine equipped with the direct injector and an ignition apparatus at center of a ceiling part of the combustion chamber. The positive tumble flow flows from the intake port side to the exhaust port side on the ceiling part side of the combustion chamber, and also flows from the exhaust port side to the intake port side on the piston top part side. The ECU calculates the injection timing of the direct injector based on the engine load. In the first injection control, the higher the engine load becomes, the more the end crank angle is retarded.
Claims3
A control system for internal combustion engine comprising:
- a combustion chamber of an internal combustion engine in which positive tumble flow is generated;
- an ignition apparatus which is provided substantially at center of a ceiling part of the combustion chamber;
- a direct injector which is provided adjacent to the ignition apparatus;
- and
- a control unit which is configured to control injection timing of the direct injector based on load of the engine,
- wherein the control unit is further configured to:
- control the injection timing to a crank angle section corresponding to intake stroke of the engine in a low-load region of the engine;
- and
- control at least end crank angle of the injection timing in a high-load region of the engine on a retard side as compared to that of the injection timing in the low-load region,
- wherein the end crank angle of the injection timing in the high-load region is within a crank angle section corresponding to a first half of compression stroke of the engine.
Dependencies are inferred from the claim text.