Fuel composition recognition and adaptation system
First Claim
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1. A method of operating an internal combustion engine, the method comprising:
- monitoring a pressure in a combustion chamber of the engine during a compression stroke;
determining whether a fuel composition has changed from a first composition to a second composition based at least in part on the monitored pressure;
in response to a determination that the fuel composition has changed, activating a fuel composition adaptation;
after activating the fuel composition adaptation, determining that the fuel composition has reached a steady-state condition;
in response to a determination that the fuel composition has reached the steady-state condition, deactivating the fuel composition adaptation; and
after deactivating the fuel composition adaptation, determining whether the fuel composition has changed from the second fuel composition to a third fuel composition based at least in part on the monitored pressure;
wherein monitoring the pressure in the combustion chamber of the engine includes determining a characteristic feature of the fuel that is a function of the pressure in the combustion chamber of the engine during the compression stroke.
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Abstract
A method of operating an internal combustion engine. The method including monitoring a pressure in a combustion chamber of the engine during a compression stroke, determining whether a fuel composition has changed from a first composition to a second composition based at least in part on the monitored pressure, and triggering a fuel composition adaptation in response to a determination that the fuel composition has changed.
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Citations
20 Claims
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1. A method of operating an internal combustion engine, the method comprising:
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monitoring a pressure in a combustion chamber of the engine during a compression stroke; determining whether a fuel composition has changed from a first composition to a second composition based at least in part on the monitored pressure; in response to a determination that the fuel composition has changed, activating a fuel composition adaptation; after activating the fuel composition adaptation, determining that the fuel composition has reached a steady-state condition; in response to a determination that the fuel composition has reached the steady-state condition, deactivating the fuel composition adaptation; and after deactivating the fuel composition adaptation, determining whether the fuel composition has changed from the second fuel composition to a third fuel composition based at least in part on the monitored pressure; wherein monitoring the pressure in the combustion chamber of the engine includes determining a characteristic feature of the fuel that is a function of the pressure in the combustion chamber of the engine during the compression stroke. - View Dependent Claims (2)
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3. A method of operating an internal combustion engine, the method comprising:
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monitoring a pressure in a combustion chamber of the engine during a compression stroke; determining whether a fuel composition has changed from a first composition to a second composition based at least in part on the monitored pressure; and triggering a fuel composition adaptation in response to a determination that the fuel composition has changed. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification