Pseudo-gear transmission control system and method
US5526261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1995 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Apr 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/194
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electronic transmission control system for a self-propelled off-road vehicle having an internal combustion engine and multiple gear powershift transmission controls the powershift transmission and provides the at least on control signal to the engine for selecting the speed at which the engine is to operate. The system preferably includes a first electronic controller that provides transmission control signals required to command the powershift transmission to shift to and operate in any particular one of its forward gears, and a second electronic controller that provides at least one engine control signal required to command the engine to operate at one of a number of different desired engine speeds and to monitor the actual engine speed. By use of gear ranges which overlap slightly, and a throttle that is infinitely adjustable within a range of engine speeds, any given ground speed within the range of possible vehicle speeds can be achieved and maintained, as long as the engine is operating within its overall power envelope. The system also supports a pseudo-gear mode where the operator interface indicates there are more gears in the transmission than actually exist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.