Patent ID: 6151543
Filing Date: 2000-11-21
Classification: B60K,F16H,Y10T

Abstract:
A control system for a transmission in a work vehicle including an engine and driven wheels, the transmission being coupled between the engine and the driven wheels and including a plurality of gears and associated clutches, the clutches engageable in predetermined combinations by an actuating circuit to define transmission gear ratios between an output speed of the engine and an output speed of the transmission, the control system comprising:an operator-actuated input device for generating transmission command signals;a memory circuit for storing a plurality of independent skip shift values, each skip shift value stored in association with a particular gear ratio; anda control circuit coupled to the input device and the memory circuit, the control circuit configured to receive the transmission command signals and to selectively engage the clutches at a predetermined shift rate to shift the transmission in response to the transmission command signals, wherein the transmission is shifted to provide a current gear ratio;wherein the control circuit determines a commanded gear ratio based at least in part upon the transmission command signals and, when the commanded gear ratio differs from the current gear ratio by more than a predetermined number of gear ratios, the control circuit accesses the memory circuit to determine the skip shift value associated with the current gear ratio and selectively engages the clutches to skip shift from the current gear ratio to the commanded gear ratio by a number of gear ratios determined by the accessed skip shift value.