Systems and methods for protecting a selectable one-way clutch of a transmission from high slip-speed engagements

A method for a vehicle having a transmission with a selectable one-way clutch, the method comprising:

• receiving an observable condition of the vehicle sensed by a sensor system;
• receiving a status of an anti-lock brake system (ABS) of the vehicle indicating whether the anti-lock brake system (ABS) is active or inactive;
• monitoring, by a processor, for a deceleration event wherein an estimated output speed acceleration of the vehicle, determined based on the observable condition sensed by the sensor system, is reduced below a first threshold;
• and
• outputting, by the processor, one or more control signals to command the transmission to inhibit application of the selectable one-way clutch in response to detection of the deceleration event when the selectable one-way clutch is not applied, and the estimated output speed acceleration of the vehicle is either:
• (i) below the first threshold while the anti-lock brake system (ABS) of the vehicle is active, or (ii) below a second threshold while the anti-lock brake system (ABS) is inactive, wherein the first threshold is greater than the second threshold.

A vehicle comprising:

• a transmission comprising a selectable one-way clutch;
• a sensor system comprising one or more sensors configured to sense an observable condition of the vehicle;
• an anti-lock brake system (ABS);
• and
• a controller configured to, by a processor:
• monitor for a deceleration event wherein an estimated output speed acceleration of the vehicle, determined based on the observable condition sensed by the sensor system, is reduced below a first threshold;
• receive a status of the anti-lock brake system (ABS) of the vehicle indicating whether the anti-lock brake system (ABS) is active or inactive;
• and
• output one or more control signals to command the transmission to inhibit application of the selectable one-way clutch in response to detection of the deceleration event when the selectable one-way clutch is not applied, and the estimated output speed acceleration of the vehicle is either:
• (i) below the first threshold while the anti-lock brake system (ABS) of the vehicle is active, or (ii) below a second threshold while the anti-lock brake system (ABS) is inactive, wherein the first threshold is greater than the second threshold.