Adaptive fuel control strategy for engine starting
First Claim
1. A method for controlling a relative amount of air and fuel provided to a combustion chamber of an internal combustion engine, the method comprising:
- adjusting an amount of air or fuel provided to the combustion chamber during an engine start based on a volatility of the fuel identified during a previous engine start and based on a change of an amount of the fuel stored on-board the vehicle before the engine start.
1 Assignment
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Accused Products
Abstract
As one example, a method is provided for controlling a relative amount of air and fuel that is provided to a combustion chamber of an internal combustion engine. The method comprises adjusting a relative amount of air and fuel provided to the combustion chamber during an engine start based on a volatility of the fuel identified during a previous engine start. As another example, a vehicle engine system is provided, comprising: an internal combustion engine including at least one combustion chamber; a fuel injector configured to provide fuel to the combustion chamber; a fuel system operatively coupled with the fuel injector including a fuel storage tank; a control system configured to vary an amount of fuel injected into the combustion chamber during an engine start based on a speed response of the engine during a previous engine run-up from rest and a change in an amount of fuel stored in the fuel storage tank before the engine start.
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Citations
20 Claims
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1. A method for controlling a relative amount of air and fuel provided to a combustion chamber of an internal combustion engine, the method comprising:
adjusting an amount of air or fuel provided to the combustion chamber during an engine start based on a volatility of the fuel identified during a previous engine start and based on a change of an amount of the fuel stored on-board the vehicle before the engine start. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. (canceled)
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9. A vehicle engine system, comprising:
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an internal combustion engine including at least one combustion chamber; a fuel injector configured to provide fuel to the combustion chamber; a fuel system operatively coupled with the fuel injector including a fuel storage tank; a control system configured to vary an amount of fuel injected into the combustion chamber during an engine start based on a speed response of the engine during a previous engine run-up from rest and a change in an amount of fuel stored in the fuel storage tank before the engine start. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of operating an internal combustion engine, the method comprising:
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performing a first engine start by providing a first fuel injection profile to the engine; performing a second engine start after the first engine start by providing a second fuel injection profile to the engine; and during the second engine start, adjusting the second fuel injection profile relative to the first fuel injection profile based on a fuel volatility and based on a chance in an amount of fuel stored on-board the vehicle before the second engine start, wherein the fuel volatility is based on an engine speed response during at least an engine speed run-up of the first engine start. - View Dependent Claims (17, 18, 20)
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19. (canceled)
Specification