Patent ID: 9689490
Date: 2017-06-27
CPC Classifications: B60Y,F16H

Claim:
1. A method for machine velocity change gear selection in a work machine having a power source and a transmission configured to be shifted to a plurality of first gears for causing the work machine to move in a first direction due to power from the power source, and to be shifted to a plurality of second gears for causing the work machine to move in a second direction opposite the first direction due to the power from the power source, wherein each of the plurality of first gears and the plurality of second gears has a corresponding end of shift velocity of the work machine when the transmission is shifted into the one of the plurality of first gears or one of the plurality of second gears, the method comprising: determining at a controller of the work machine a current velocity of the work machine moving in the first direction based on information transmitted in a speed sensor signal from a speed sensor of the work machine; determining at the controller a maximum velocity change for the work machine from the current velocity, wherein the maximum velocity change is determined based on a maximum amount of energy that may be expended by components of the transmission to change a velocity of the work machine without increasing a current temperature of a relevant component of the transmission above a clutch limit temperature above which the transmission may experience a failure mode; selecting at the controller a machine velocity change target gear from the plurality of first gears and the plurality of second gears that has the greatest difference between the current velocity of the work machine and the end of shift velocity of the selected one of the plurality of first gears or one of the plurality of second gears that is not greater than the maximum velocity change; detecting at the controller a directional shift command input by an operator at an input direction control of the work machine; and causing the transmission to execute a shift to the machine velocity change target gear in response to detecting the direction shift command at the controller.