Search International and National Patent Collections

1. (WO2017059159) TRANSMISSION SYSTEM IMPLEMENTING AUTOMATED DIRECTIONAL SHIFT BRAKING

Pub. No.:    WO/2017/059159    International Application No.:    PCT/US2016/054586
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Sat Oct 01 01:59:59 CEST 2016
IPC: B60W 30/18
B60W 10/113
B60W 10/184
B60W 10/02
B60W 50/00
Applicants: CATERPILLAR INC.
Inventors: TINKER, Matthew Michael
GULDAN, Mathew D.
KOTHARI, Chintan Govindbhai
WILL, Bradley John
LORENTZ, Timothy Alan
Title: TRANSMISSION SYSTEM IMPLEMENTING AUTOMATED DIRECTIONAL SHIFT BRAKING
Abstract:
A transmission system (22) is disclosed for use with a machine (10). The transmission system may have a first clutch (34) to transfer power in a first direction, a second clutch (36) to transfer power in a second direction, a brake (43), a sensor (46) to generate a first signal indicative of speed, and an input device (18) to generate a second signal indicative of a desire to shift directions. The transmission system may also have a controller (44) to cause disengagement of the first directional clutch in response to the second signal, and to cause the brake to apply retarding torque. The controller may also be configured to determine an error value based on the first signal and a target transmission system speed, to selectively increase retarding torque when the error value increases, and to selectively transfer retarding torque to the second directional clutch when a value of the second signal is less than a threshold value.