Method for controlling rate of change of ratio in a continuously variable transmission
US7303505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Aug 2, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2710/0644
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for controlling a rate of change of speed ratios in a continuously variable transmission (CVT) includes sensing a vehicle speed, sensing an engine speed, and sensing a change in a position of an accelerator pedal. The method includes determining a desired engine speed based on the change in the position of the accelerator pedal, the vehicle speed, and the engine speed. The method includes increasing a target engine speed at a first rate to a predetermined value, wherein the target engine speed corresponds to a speed ratio. The method includes measuring a difference between the target engine speed that is held at the predetermined value and an actual engine speed, and increasing the target engine speed to the desired engine speed at a second rate when the difference substantially equals a predetermined threshold, wherein the second rate is less than the first rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.