Directional shift control in vehicles

摘要

A method of controlling gear selection in a transmission, e.g. powershift transmission, of a vehicle in response to a directional shift (e.g. forward to reverse) requested by an operator, e.g. via a joystick. The method compares a current transmission output speed with a predetermined direction shift threshold transmission output speed. If the current transmission output speed is less than or equal to the predetermined direction shift threshold transmission output speed, the transmission shifts from an initial first direction gear to a same second direction gear, or a next highest second direction gear. If the current transmission output speed is greater than the predetermined direction shift threshold transmission output speed, the direction shift is inhibited until the current transmission output speed slows to less than or equal to the predetermined direction shift threshold transmission output speed. Reference is also made to a control system for controlling gear selection to manage directional shifts in vehicles and to a vehicle the control system.