System and method for operating engine cylinders
First Claim
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1. An engine control method, comprising:
- activating and deactivating a cylinder of an engine via a controller in response to an engine cylinder firing fraction and a remainder value, the remainder value based on the engine cylinder firing fraction.
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Abstract
Systems and methods for activating and deactivating cylinders of an engine that may activate and deactivate one cylinder independent of other cylinders are presented. In one example, an engine cylinder firing fraction and a remainder value that is based on the engine cylinder firing fraction are a basis for activating and deactivating engine cylinders. The systems and methods also provide for transitioning between different cylinder firing fractions.
4 Citations
20 Claims
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1. An engine control method, comprising:
activating and deactivating a cylinder of an engine via a controller in response to an engine cylinder firing fraction and a remainder value, the remainder value based on the engine cylinder firing fraction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An engine control method, comprising:
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providing an engine cylinder firing fraction via a controller based on a desired engine torque; adjusting a previous remainder value in response to the engine cylinder firing fraction changing and the engine cylinder firing fraction providing a stationary cylinder firing pattern with a reference cylinder, the previous remainder value based on a number of engine cylinders and an actual total number of cylinder events after a reference cylinder; not adjusting the previous remainder value in response to the engine cylinder firing fraction changing and the engine cylinder firing fraction not providing the stationary cylinder firing pattern with the reference cylinder; and firing or not firing an engine cylinder via the controller in response to the previous remainder value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An engine system, comprising:
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an engine including one or more cylinder deactivating mechanisms; a controller including executable instructions stored in non-transitory memory to activate and fire a cylinder, or deactivate and not fire the cylinder, in response to a value based on an engine cylinder firing fraction and a remainder, the remainder a value based on the engine cylinder firing fraction and a previous remainder, the previous remainder initialized with a predetermined value. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification