Adaptable modification of cylinder deactivation threshold
First Claim
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1. An engine control system in a vehicle comprising:
- a variable displacement internal combustion engine;
a controller for controlling the displacement of said variable displacement internal combustion engine;
wherein said controller adaptively determines a torque threshold used to switch the variable displacement internal combustion engine between a partially displaced operating mode and a fully displaced operating mode based on a time the variable displacement internal combustion engine operates in said partially displaced operating mode.
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Abstract
An engine control system in a vehicle including a variable displacement internal combustion engine, a controller for controlling the displacement of the variable displacement internal combustion engine, where the controller adaptively determines a torque threshold used to switch the variable displacement internal combustion engine between a partially displaced operating mode and a fully displaced operating mode.
36 Citations
10 Claims
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1. An engine control system in a vehicle comprising:
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a variable displacement internal combustion engine;
a controller for controlling the displacement of said variable displacement internal combustion engine;
wherein said controller adaptively determines a torque threshold used to switch the variable displacement internal combustion engine between a partially displaced operating mode and a fully displaced operating mode based on a time the variable displacement internal combustion engine operates in said partially displaced operating mode. - View Dependent Claims (2, 3, 4, 5)
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6. (Cancelled)
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7. A method of controlling the displacement of a variable displacement internal combustion engine comprising the steps of:
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measuring a variable indicative of torque for the variable displacement internal combustion engine;
determining a time the variable displacement engine operates in a partially displaced operating mode; and
adaptively modifying a torque threshold to vary the displacement of the variable displacement internal combustion engine based on said time.
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8. (Cancelled)
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9. A method of controlling the displacement of a variable displacement internal combustion engine comprising the steps of:
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measuring a engine intake manifold vacuum for the variable displacement internal combustion engine; and
adaptively modifying a vacuum threshold to vary the displacement of the variable displacement internal combustion engine based on a time the variable displacement engine operates in a partially displaced operating mode.
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10. (Cancelled)
Specification