Change-speed control system for utility vehicle having stepless change-speed apparatus for speed-changing engine output and transmitting the speed-changed output to traveling unit
US7367247B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Jan 3, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2186
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A change-speed control system is provided for a utility vehicle having a stepless change-speed apparatus for speed-changing an engine output and transmitting the speed-changed output to a traveling unit. The system includes an engine speed governor for adjusting speed of the engine, an accelerator controller and a change-speed control linkage device for providing operative displacements in the stepless change-speed apparatus and the engine speed governor in association with an operation of the accelerator controller. The change-speed control linkage device sets an operation amount for the stepless change-speed apparatus and an operation amount for the engine speed governor in correlation with the operation amount of the accelerator controller, such that an acceleration ratio for the engine speed is greater than an acceleration ratio for the stepless change-speed apparatus until the engine reaches a predetermined speed and also the stepless change-speed apparatus reaches a predetermined speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.