Invention Application
- Patent Title: CONTROL SYSTEM AND METHOD THEREOF FOR MULTISPEED TRANSMISSION
-
Application No.: PCT/US2018/038472Application Date: 2018-06-20
-
Publication No.: WO2019005553A3Publication Date: 2019-01-03
- Inventor: TRYON, Eric , LONG, Charles F. , HAGELSKAMP, Bryan
- Applicant: ALLISON TRANSMISSION, INC.
- Applicant Address: One Allison Way Indianapolis, IN 46222 US
- Assignee: ALLISON TRANSMISSION, INC.
- Current Assignee: ALLISON TRANSMISSION, INC.
- Current Assignee Address: One Allison Way Indianapolis, IN 46222 US
- Agency: ROST, Stephen F.
- Priority: US62/527,202 20170630
- Main IPC: F16H3/44
- IPC: F16H3/44 ; F16H61/00
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.
Public/Granted literature
- WO2019005553A2 CONTROL SYSTEM AND METHOD THEREOF FOR MULTISPEED TRANSMISSION Public/Granted day:2019-01-03
Information query