Control of infinitely variable transmission
US6666793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Mar 10, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2037/088
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A controller calculates a target speed ratio of a continuously variable transmission incorporated into an infinitely variable transmission for a vehicle and a target vehicle speed according to a vehicle running state. When a predetermined creep torque limiting condition holds, the controller limits the target vehicle speed such that the difference between the target vehicle speed and the real vehicle speed is within a predetermined range. By controlling the speed ratio of the continuously variable transmission such that this difference diminishes, the infinitely variable transmission generates a creep torque consistent with the intention of the driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.