METHOD AND SYSTEM FOR ENGINE CONTROL
First Claim
Patent Images
1. A method of operating a vehicle including an engine and a motor, comprising:
- adjusting an engine fuel injection amount based on a seasonal grade of fuel in a fuel tank of the vehicle relative to a season of vehicle operation.
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Accused Products
Abstract
Methods and systems are provided for adjusting operation of a plug-in hybrid electric vehicle responsive to a seasonal grade of the fuel available in the vehicle'"'"'s fuel tank. If the seasonal grade of fuel in the fuel tank does not correspond to the seasonal grade of fuel mandated during the time of engine operation, a fuel injection amount is adjusted to compensate for differences between seasonal grades of a fuel.
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Citations
20 Claims
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1. A method of operating a vehicle including an engine and a motor, comprising:
adjusting an engine fuel injection amount based on a seasonal grade of fuel in a fuel tank of the vehicle relative to a season of vehicle operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a vehicle including an engine and a motor, comprising:
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during a first condition, when an estimated fuel age is higher than a threshold, operating the engine while injecting a first, larger amount of fuel; and during a second condition, when the estimated fuel age is higher than the threshold, operating the engine while injecting a second, smaller amount of fuel. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A vehicle system, comprising:
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an engine; an electric motor; a fuel tank for providing fuel to the engine, the fuel tank including a fuel level sensor; an auxiliary system including a clock; a control system with computer readable instructions for; inferring a seasonal grade of the fuel based on an estimated age of the fuel; and adjusting an engine fuel injection amount based on the seasonal grade of the fuel relative to an estimated season of vehicle operation. - View Dependent Claims (17, 18, 19, 20)
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Specification