Shift enable control method/system
US5272939A · kind A · utility
69Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jul 6, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/148
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system/method for an at least partially automated mechanical transmission system (10) is provided for determining if selected upshifts into a target gear ratio are acceptable (208) or not acceptable (210) under current vehicle operating conditions and for prohibiting the initiation of not acceptable selected upshifts. An upshift is deemed acceptable if the available drivewheel torque (206) in the target ratio is sufficient to maintain at least a minimum acceptable vehicle acceleration (A.sub.0) after the upshift under current vehicle operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.