Control system for a clutch during a regenerative braking event
AssigneeFord Global Technologies, LLC
InventorsMing Lang Kuang, Bernard D. Nefcy, Yanan Zhao, Daniel Scott Colvin
Life of this patent
Estimating the term…
Abstract
A vehicle includes an electric machine, battery, torque converter bypass clutch, drive wheel, and controller. The electric machine is configured to recharge the battery via regenerative braking. The torque converter bypass clutch is disposed between the electric machine and the drive wheel. The controller is programmed to, in response to a negative drive wheel torque command during a regenerative braking event, adjust a closed-state torque capacity of the torque converter bypass clutch based on the torque command.
Claims17
A vehicle system comprising:
- a controller programmed to,
- in response to a decreasing drive wheel torque command during a regenerative braking event, adjust a closed-state torque capacity of a torque converter bypass clutch, disposed between an electric machine and a drive wheel, based on the torque command and in proportion to negative values of the torque command, wherein the drive wheel torque command is filtered by an anti-jerk torque control algorithm, and
- in response to an unfiltered drive wheel torque command becoming negative while the filtered drive wheel torque command remains positive during a first period, decrease the torque capacity of the bypass clutch to a minimum closed-state value.
A vehicle comprising:
- a powertrain configured to transfer kinetic energy to an electric machine to charge a battery during regenerative braking;
- a clutch disposed between the electric machine and a drive wheel;
- and
- a controller programmed to,
- in response to a negative drive wheel torque command during a regenerative braking event, adjust a closed-state torque capacity of the clutch based on the torque command, wherein the drive wheel torque command is filtered by an anti-jerk torque control algorithm, and
- in response to an unfiltered drive wheel torque command becoming negative while the filtered drive wheel torque command remains positive during a first period, decrease the torque capacity of the clutch to a minimum closed-state value.
A vehicle comprising:
- an electric machine configured to recharge a battery via regenerative braking;
- a torque converter bypass clutch disposed between the electric machine and a drive wheel;
- and
- a controller programmed to,
- in response to a negative drive wheel torque command during a regenerative braking event, adjust a closed-state torque capacity of the clutch based on the torque command, wherein the drive wheel torque command is filtered by an anti-jerk torque control algorithm, and
- in response to an unfiltered drive wheel torque command becoming negative while the filtered drive wheel torque command remains positive during a first period, decrease the torque capacity of the bypass clutch to a minimum closed-state value.
Dependencies are inferred from the claim text.