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AssigneeFord Global Technologies, LLC
InventorsKelly Johnson, Rian Edman, Gregory Dean Ognjanovski, Garrett Carlson
Estimating the term…
A system and method for controlling a hybrid vehicle having an engine, a traction motor, and an automatic step-ratio transmission having a plurality of selectable discrete gear ratios, a torque converter, and sharing a common cooling fluid or oil with the traction motor, include a controller configured to shift the automatic step-ratio transmission to neutral in response to vehicle speed being below a threshold with the engine idling while temperatures of at least two of: the traction battery, the electric machine, and the transmission are above associated thresholds to reduce heat generation by the torque converter due to oil shear with the torque converter stalled. The controller may shift the transmission to drive in response to release of a brake pedal. A neutral shift may also be performed in response to high-voltage accessory loads or on-board generator loads exceeding a threshold.
A vehicle comprising:
A system comprising:
A method for controlling a vehicle having an engine, an electric machine coupled to a traction battery, and a step-ratio transmission with a torque converter coupled to the electric machine, the method comprising, by a vehicle controller:
Dependencies are inferred from the claim text.