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US 9,168,825 B2Granted
Hybrid electric vehicle and method for controlling a powertrain therein
AssigneeFord Global Technologies, LLC
InventorsWalter Joseph Ortmann, Daniel Scott Colvin, Marvin Paul Kraska
Life of this patent
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Abstract
A method for controlling a hybrid electric powertrain includes, in response to a request to increase a powertrain braking force on at least one of a plurality of traction wheels, (i) commanding at least one clutch to increase a gear ratio of a transmission, and (ii) during clutch stroke, commanding an electric machine to act as a generator such that the electric machine applies a braking force to at least one of the traction wheels.
Claims12
A method comprising:
- by a controller,
- in response to a request to increase a powertrain braking force on a traction wheel,
- commanding at least one clutch of a transmission to increase a gear ratio of the transmission, and
- during stroking of the clutch, commanding an electric machine to act as a generator such that the electric machine applies a braking force to the traction wheel.
1 more element
A hybrid electric vehicle comprising:
- a plurality of fraction wheels;
- an engine;
- a transmission mechanically connected with the engine and including at least one clutch to alter a gear ratio of the transmission;
- an electric machine mechanically connected with at least one of the traction wheels;
- and
- a controller configured to, in response to a request to increase a powertrain braking force on at least one of the traction wheels, (i) command the at least one clutch to increase the gear ratio of the transmission and (ii) during stroking of the clutch, command the electric machine to act as a generator such that the electric machine applies a braking force to at least one of the traction wheels.
3 more elements
Dependencies are inferred from the claim text.