Caterpillar Inc.
SYSTEM AND METHOD TO CONTROL POWERTRAIN DURING DIRECTIONAL SHIFT

Abstract:

A method for controlling powertrain of a machine not having a torque converter output speed sensor during a direction change of the machine is provided. The method includes retrieving a first desired engine speed value and a second desired engine speed value based on a detection of the direction change by a control module. The second desired engine speed value is determined based on a current gear setting of a gear shift lever and a desired gear setting of the gear shift lever. The method further includes determining the desired engine speed value based on a comparison between the first desired engine speed value and the second desired engine speed value by the control module. The control module is configured to identify a lower value of the first desired engine speed value and the second desired engine speed value as the desired engine speed value.