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US 10,106,149 B2Granted
Torque converter clutch engagement pressure control for regenerative braking
AssigneeFord Global Technologies, LLC
InventorsYanan Zhao, Bernard D. Nefcy, Ming Lang Kuang
Life of this patent
Estimating the term…
Abstract
A vehicle system may include a controller configured to increase, after a specified delay, an engagement pressure of a torque converter clutch prior to occurrence of the event to a target pressure that is based on a regenerative braking torque estimate associated with the event such that a portion of energy associated with the event is converted to electricity. The controller may increase the engagement pressure in response to an accelerator pedal release and an expected regenerative braking event.
Claims17
A vehicle system comprising:
- a controller configured to, in response to an accelerator pedal release and an expected regenerative braking event, increase, after a specified delay, an engagement pressure of a torque converter clutch prior to occurrence of the event to a target pressure that is based on a regenerative braking torque estimate associated with the event such that a portion of energy associated with the event is converted to electricity.
A vehicle comprising:
- a controller configured to, in response to accelerator pedal release and an expected regenerative braking event, delay pressurization of a torque converter clutch until a period having a longest calculable duration at an efficiency threshold, that is based on a predetermined pressurization rate of the clutch, expires to ensure an engagement pressure of the clutch achieves an estimated clutch engagement pressure based on a comfort level prior to actuation of the brake.
A vehicle comprising:
- a controller configured to, in response to accelerator pedal release and an expected regenerative braking event, delay pressurization of a torque converter clutch for a period based on a difference between a current torque converter clutch engagement pressure and an estimated torque converter clutch engagement pressure.
Dependencies are inferred from the claim text.