Engine brake enhanced upshift control method/system
US5425689A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Jan 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19251
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system/method for an at least partially automated mechanical transmission system (10), inclading a controller (106) operated engine brake (EB), is provided. The control system/method is effective to determine if selected upshifts into a target gear ratio are feasible (212, 214) or not feasible (216) under current vehicle operating conditions and to prohibit the initiation of not feasible selected upshifts. The transmission system includes an engine brake actuator (23A) operable by the system controller (106). selected upshifts are evaluated and will be implemented, if feasible, in a sequence wherein feasibility is a function of engine deceleration (dES/dt), and engine deceleration is assigned expected values at minimum to progressively greater engine braking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.