Control system/method for engine brake assisted shifting
US5409432A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Aug 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S477/902
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control method/system for controlling upshifting in an automated mechanical transmission system (10) provided with an engine compression brake (50) is provided. A control unit (54) is effective to operate the engine compression brake during a transmission upshift such that at initiation of an upshift the engine compression brake applies a minimum retarding torque to the engine, the retarding torque is then gradually increased to a maximum retarding torque value and, upon sensing that engine speed (ES) is within a predetermined value (REF.sub.1) of the synchronous value thereof, the retarding torque applied by the engine brake is caused to gradually decrease until such time as engine speed reaches the synchronous window therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.