Methods and Systems of Controlling A Vehicle Powertrain
First Claim
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1. A vehicle comprising:
- a powertrain having an engine selectively mechanically coupled via a friction element to an electric machine; and
a controller programmed to, while operating the powertrain in a hybrid mode and in response to a steering angle greater than a threshold and a decrease in accelerator pedal position, maintain the engine coupling via the friction element to the electric machine and reduce fuel delivery to the engine.
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Abstract
A vehicle may include a controller programmed to, in response to a vehicle speed less than a speed threshold, a decrease in driver demand, and a change in steering position greater than a position threshold, maintain a friction element pressure of a friction element configured to couple an engine with and electric machine, and increase an amount of spark retard associated with an engine cylinder.
43 Citations
20 Claims
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1. A vehicle comprising:
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a powertrain having an engine selectively mechanically coupled via a friction element to an electric machine; and a controller programmed to, while operating the powertrain in a hybrid mode and in response to a steering angle greater than a threshold and a decrease in accelerator pedal position, maintain the engine coupling via the friction element to the electric machine and reduce fuel delivery to the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle comprising:
a controller programmed to, in response to a vehicle speed falling below a speed threshold, a decrease in driver demand, and a change in steering position greater than a position threshold, maintain a friction element pressure of a friction element configured to couple an engine with an electric machine, and increase an amount of spark retard associated with an engine cylinder. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of controlling a vehicle powertrain comprising:
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in response to a decrease in accelerator pedal position and a change in steering angle greater than a threshold angle while a vehicle speed is less than a threshold speed, deactivating an engine such that an engine crankshaft is permitted to rotate, and maintaining a friction element pressure such that the engine remains mechanically coupled to an electric machine or a transmission of the powertrain. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification