Title:
CONTROL SYSTEM AND METHOD THEREOF FOR MULTISPEED TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2019/005553
Kind Code:
A3
Abstract:
An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.
Inventors:
TRYON ERIC (US)
LONG CHARLES F (US)
HAGELSKAMP BRYAN (US)
LONG CHARLES F (US)
HAGELSKAMP BRYAN (US)
Application Number:
PCT/US2018/038472
Publication Date:
February 07, 2019
Filing Date:
June 20, 2018
Export Citation:
Assignee:
ALLISON TRANSM INC (US)
International Classes:
F16H3/44; F16H61/00
Domestic Patent References:
| WO2011075318A1 | 2011-06-23 |
Foreign References:
| US20150075315A1 | 2015-03-19 | |||
| US20070281816A1 | 2007-12-06 | |||
| US20120261008A1 | 2012-10-18 | |||
| US20110167812A1 | 2011-07-14 |
Attorney, Agent or Firm:
ROST, Stephen F. (US)
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