Method of compensating torque at cylinder switching on a DOD engine with electric parallel hybrid
First Claim
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1. A method for managing torque in a hybrid electric vehicle with a variable displacement internal combustion engine (ICE), an electric machine and a battery, comprising:
- operating the ICE in an activated mode where all cylinders are active;
transitioning the ICE from the activated mode to a deactivated mode where the engine is operating with less than all cylinders active; and
smoothing disturbances in ICE torque during the deactivation transition using the electric machine.
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Abstract
A method for managing torque in a hybrid electric vehicle uses a displacement on demand (DOD) internal combustion engine (ICE), an electric machine and a battery. The method includes smoothing disturbances in ICE torque during a DOD transition using the electric machine.
46 Citations
23 Claims
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1. A method for managing torque in a hybrid electric vehicle with a variable displacement internal combustion engine (ICE), an electric machine and a battery, comprising:
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operating the ICE in an activated mode where all cylinders are active; transitioning the ICE from the activated mode to a deactivated mode where the engine is operating with less than all cylinders active; and smoothing disturbances in ICE torque during the deactivation transition using the electric machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for managing torque in a hybrid electric vehicle with a variable displacement internal combustion engine (ICE), an electric machine and a battery, comprising:
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operating the ICE in a deactivated mode where the ICE is operating with less than all cylinders active; transitioning the ICE from the deactivated mode to an activated mode where the ICE is operating with all cylinders active; smoothing disturbances in ICE torque during the reactivation transition between the deactivated mode and the activated mode using the electric machine; and wherein the step of smoothing disturbances comprises using the electric machine to generate electricity from excess ICE torque when the ICE torque is greater than a desired torque. - View Dependent Claims (10)
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11. A method for managing torque in a hybrid electric vehicle with a variable displacement internal combustion engine (ICE), an electric machine and a battery, comprising:
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operating the ICE in a deactivated mode where the ICE is operating with less than all cylinders active; transitioning the ICE from the deactivated mode to an activated mode where the ICE is operating with all cylinders active; smoothing disturbances in ICE torque during the reactivation transition between the deactivated mode and the activated mode using the electric machine; transitioning the ICE from the activated mode to the deactivated mode; and smoothing disturbances in ICE torque during the deactivation transition using the electric machine. - View Dependent Claims (12, 13, 14)
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15. A torque management system for a hybrid electric vehicle with a variable displacement internal combustion engine (ICE), comprising:
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an electric machine; and a torque management module that smoothes disturbances in ICE torque using the electric machine during transitions from a deactivated mode where the engine is operating with less than all cylinders active to an activated mode where the engine is operating with all cylinders active. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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