Fuel-cut manifold absolute pressure control
First Claim
Patent Images
1. A method of regulating a throttle opening of an engine in a hybrid electric vehicle system, comprising:
- initiating a fuel-cut off operating mode of the engine;
monitoring an engine speed;
regulating the throttle opening based on said engine speed during said fuel-cut off mode; and
maintaining a manifold absolute pressure (MAP) of said engine above a threshold MAP during said fuel-cut off mode.
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Abstract
A method of regulating a throttle opening of an engine in a hybrid electric vehicle system includes initiating a fuel-cut off operating mode of the engine, monitoring an engine speed during said fuel cut-off operating mode and regulating the throttle opening based on the engine speed during the fuel-cut off mode to maintain a manifold absolute pressure (MAP) of the engine above a threshold MAP.
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Citations
15 Claims
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1. A method of regulating a throttle opening of an engine in a hybrid electric vehicle system, comprising:
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initiating a fuel-cut off operating mode of the engine; monitoring an engine speed; regulating the throttle opening based on said engine speed during said fuel-cut off mode; and maintaining a manifold absolute pressure (MAP) of said engine above a threshold MAP during said fuel-cut off mode. - View Dependent Claims (2, 3, 4, 5)
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6. A throttle regulation system of an engine in a hybrid electric vehicle system, comprising:
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a first module that initiates a fuel-cut off operating mode of the engine; a second module that monitors an engine speed; a third module that regulates a throttle opening based on said engine speed during said fuel-cut off mode, wherein said third module maintains a manifold absolute pressure (MAP) of said engine above a threshold MAP during said fuel-cut off mode. - View Dependent Claims (7, 8, 9, 10)
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11. A method of regulating a throttle of an engine in a hybrid electric vehicle system, comprising:
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initiating a fuel-cut off operating mode of the engine; determining one of a desired torque and a base throttle area; regulating a throttle opening based on said one of said desired torque and said base throttle area during said fuel-cut off mode; and maintaining a manifold absolute pressure (MAP) of said engine above a threshold MAP during said fuel-cut off mode. - View Dependent Claims (12, 13, 14, 15)
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Specification