Patent ID: 8849528

Claim:
A system for selecting shift schedules of a transmission of a vehicle configured to change gears according to two or more shift schedules, the system comprising: a controller configured to: receive a signal indicative of acceleration of the vehicle prior to a change of a gear of the transmission; estimate tractive effort of the vehicle following the change of the gear of the transmission, the tractive effort estimation being based on at least an estimation of a road load on the vehicle and an estimate of vehicle mass, the vehicle mass estimation being based on acceleration of the vehicle after the change of the gear of the transmission; and select between a first shift schedule and a second shift schedule based on the tractive effort estimation, wherein, if the tractive effort estimation is less than a threshold value, the controller selects the first shift schedule, and if the tractive effort estimation is at least equal to the threshold value, the controller selects the second shift schedule.