Method and system for performing regenerative braking with feedback from brake-traction control system

An apparatus for operating a vehicle on a reduced traction surface comprising:

• a controller configured to:
• obtain, during a derate period of the vehicle in which the vehicle is operating under a sustained derate in which a torque limit is applied on a maximum allowed braking torque of the vehicle, at least one of:
• ambient information or GPS information;
• set a verification period during which the torque limit applied on the maximum allowed braking torque is to remain unchanged based on the ambient information or the GPS information;
• set an increment size by which the torque limit is configured to be changed, the increment size being set based on the ambient information or the GPS information;
• and
• in an absence of traction control event indicative of a loss of traction by the vehicle during the verification period, incrementally remove the torque limit on the maximum allowed braking torque based on the increment size.

A vehicle system comprising:

• a drive unit including a prime mover;
• and
• a controller coupled with the drive unit, the controller configured to:
• obtain, during a derate period in which the vehicle system is operating under a sustained derate in which a torque limit is applied on a maximum allowed braking torque of the vehicle system, at least one of:
• ambient information or GPS information;
• set a reduction rate at which the torque limit is configured to be reduced, the reduction rate being adjustable based on the ambient information or the GPS information;
• and
• in an absence of traction control event indicative of a loss of traction by the vehicle system, reduce the torque limit on the maximum allowed braking torque based on the reduction rate.