System and method to control transitions in the number of cylinders in a hybrid vehicle
First Claim
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1. A vehicle system, comprising:
- a engine provided for disabling and enabling at least one cylinder;
a motor coupled to said engine provided for absorbing torque and providing torque;
a controller for disabling and enabling said at least one cylinder, and during at least one of disabling and enabling, varying torque of said motor to compensate for transient changes in engine output torque caused by said one of disabling and enabling and selectively varying torque of said motor based on battery state of charge, wherein said controller further adjusts throttle position during at least one of disabling and enabling.
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Abstract
A vehicle system is disclosed. The system include a engine capable of disabling and enabling at least one cylinder; a motor coupled to said engine capable of absorbing torque and providing torque; and a controller for disabling and enabling said at least one cylinder, and during at least one of disabling and enabling, varying torque of said motor to compensate for transient changes in engine output torque caused by said one of disabling and enabling.
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Citations
22 Claims
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1. A vehicle system, comprising:
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a engine provided for disabling and enabling at least one cylinder; a motor coupled to said engine provided for absorbing torque and providing torque; a controller for disabling and enabling said at least one cylinder, and during at least one of disabling and enabling, varying torque of said motor to compensate for transient changes in engine output torque caused by said one of disabling and enabling and selectively varying torque of said motor based on battery state of charge, wherein said controller further adjusts throttle position during at least one of disabling and enabling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vehicle system, comprising:
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a engine provided for disabling and enabling at least one cylinder, a motor coupled to said engine provided for absorbing torque and producing torque; a controller for disabling and enabling said at least one cylinder, and during at least one of disabling and enabling, varying torque of said motor to compensate for transient changes in engine output torque caused by said one of disabling and enabling, and varying whether said motor selectively produces or absorbs torque based on at least battery state of charge, where said motor produces torque when said battery state of charge has a first charge level, and where said motor absorbs torque when said battery state of charge has a second charge level, lower than the first charge level, wherein said controller further adjusts throttle position during at least one of disabling and enabling. - View Dependent Claims (14, 15)
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16. A computer storage medium having stored data representing instructions executable by a computer to control a vehicle system, the vehicle system comprising a engine provided for disabling and enabling at least one cylinder and a motor coupled to said engine provided for absorbing torque and producing torque, the medium comprising:
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code for disabling and enabling said at least one cylinder; code for assessing a battery state of charge; code for, during at least one of disabling and enabling, varying torque of said motor to compensate for transient changes in engine output torque caused by said one of disabling and enabling; code for adjusting throttle position during at least one of disabling and enabling; and code for varying whether said motor produces or absorbs torque based on at least battery state of charge. - View Dependent Claims (17)
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18. A vehicle system, comprising:
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an engine that dynamically varies displacement by selectively enabling and disabling at least one of a plurality of cylinders, the engine being operatively linked to at least one of a plurality of drive wheels; a motor to exchange energy with at least one of the drive wheels by selectively absorbing energy from the drive wheel or providing energy to the drive wheel; a controller for assessing steady-state vehicle torque requirements and selecting a steady-state engine displacement and a steady-state motor condition, where the controller further predicts transient torque fluctuations anticipated to occur when engine displacement is varied and temporarily selects a transient motor condition, different than the steady-state motor condition, to smooth the predicted transient torque fluctuations. - View Dependent Claims (19, 20, 21, 22)
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Specification