Automatic shift preselection mode for mechanical transmission system with semi-automatic shift implementation
US5053962A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1989 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Jun 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1926
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system (104) for semi-automatically executing automatically and manually selected upshifts and downshifts of a mechanical transmission system (10) is provided. The control system includes a central processing unit (106) for receiving input signals indicative of transmission input shaft (16) and output shaft (90) speeds and from a driver control console (108) indicative of manual selection of upshifts or downshifts from a currently engaged gear ratio, or manual selection of operation in an automatic preselect mode, and processing the same in accordance with predetermined logic rules to issue command output signals to a transmission actuator (112, 70, 96) to implement the selected shifts upon a manually caused torque break of the transmission and manual substantial synchronization of the transmission in the selected ratio thereafter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.