Patent ID: 8762013
Filing Date: 2014-06-24
Classification: F16H

Abstract:
1. A vehicle configured to perform shuttle-shifting, comprising: an engine; a power shift transmission operably connected with the engine comprising forward and reverse mechanical gears, the power shift transmission having more forward mechanical gears than reverse mechanical gears; and a processor operably connected to the power shift transmission and to the engine, the processor being configured to: receive a command from a user to establish a relationship between a last forward gear used and a desired reverse performance, determine a desired reverse gear ratio based upon the last forward gear used and the established relationship, identify a first predetermined reverse gear ratio associated with a first reverse mechanical gear, wherein the first predetermined reverse gear ratio is the same as or less than the desired reverse gear ratio; identify a second predetermined reverse gear ratio associated with a second mechanical gear, wherein the second predetermined reverse gear ratio is greater than the desired reverse gear ratio; compare the first predetermined reverse gear ratio to the desired reverse gear ratio and the second predetermined reverse gear ratio to the desired reverse gear ratio; determine whether the second predetermined reverse gear ratio is closer than the first predetermined reverse gear ratio to the desired reverse gear ratio by a predetermined threshold; determine whether an engine rotation rate is sufficiently adjustable to compensate for a difference between the second predetermined reverse gear ratio and the desired reverse gear ratio; select the first predetermined reverse gear ratio while the second predetermined reverse gear ratio is not closer to the desired reverse gear ratio by the predetermined threshold or while the engine rotation rate is not sufficiently adjustable to compensate for the difference; control the power shift transmission to effectuate a shift to a reverse mechanical gear associated with the selected first predetermined reverse gear ratio, and if the selected first predetermined reverse gear ratio is less than the desired reverse gear ratio, control the engine rotation rate to compensate for a difference between the selected first predetermined reverse gear ratio and the desired reverse gear ratio.