Fuel control method for internal combustion engine
AssigneeHyundai Motor Company
InventorYoun-Su Kim
Life of this patent
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Abstract
The invention provides a fuel control method and system for an internal combustion engine. The method includes: calculating an initial amount of fuel based on an amount of intake air, calculating a first cylinder bank air/fuel ratio matching coefficient and a second cylinder bank air/fuel ratio matching coefficient based on an engine speed and a volumetric efficiency, and controlling the amounts of fuel in the second and first banks, using the calculated second bank air/fuel ratio matching coefficient and the first bank air/fuel ratio matching coefficient, respectively. The system includes a control unit and a fuel injection system for implementing the method.
Claims10
A fuel control method for an internal combustion engine including a first cylinder bank and a second cylinder bank, comprising:
- detecting an amount of intake air;
- determining an initial amount of fuel based on the detected amount of intake air;
- detecting an engine speed;
- calculating a volumetric efficiency based on the detected amount of intake air and engine speed;
- determining a first bank air/fuel ratio matching coefficient and a second bank air/fuel ratio matching coefficient for the detected engine speed and the calculated volumetric efficiency;
- and
- determining a final amount of fuel for the first bank based on the initial amount of fuel and the first bank air/fuel ratio matching coefficient;
- and
- determining a final amount of fuel for the second bank based on the initial amount of fuel and the second bank air/fuel ratio matching coefficient.
A fuel control system for an internal combustion engine including a first cylinder bank and a second cylinder bank, the system comprising:
- a control unit for determining an amount of fuel based on one or more engine operating conditions and generating a signal representative of the determined amount of fuel;
- and
- a fuel injection device for injecting fuel into the engine according to the signal from the control unit, wherein the control unit is programmed to execute a control method comprising:
- detecting an amount of intake air;
- determining an initial amount of fuel based on the detected amount of intake air;
- detecting an engine speed;
- calculating a volumetric efficiency based on the detected amount of intake air and engine speed;
- determining a first bank air/fuel ratio matching coefficient and a second bank air/fuel ratio matching coefficient for the detected engine speed and the volumetric efficiency;
- determining a final amount of fuel for the first bank based on the initial amount of fuel and the first bank air/fuel ratio matching coefficient;
- and
- determining a final amount of fuel for the second bank based on the initial amount of fuel and the second bank air/fuel ratio matching coefficient.
A fuel control method for an internal combustion engine including a first cylinder bank and a second cylinder bank, comprising:
- determining an initial amount of fuel based on an amount of intake air;
- determining a volumetric efficiency based on the amount of intake air and an engine speed;
- determining a first bank air/fuel ratio matching coefficient and a second bank air/fuel ratio matching coefficient for the engine speed and the volumetric efficiency;
- and
- determining a final amount of fuel for the first bank based on the initial amount of fuel and the first bank air/fuel ratio matching coefficient;
- and
- determining a final amount of fuel for the second bank based on the initial amount of fuel and the second bank air/fuel ratio matching coefficient.
Dependencies are inferred from the claim text.