Transmission ratio control system for a continuously variable transmission
US4872377A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Apr 25, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66263
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A continuously variable transmission has a drive pulley having a shiftable disc, a driven pulley having a shiftable disc, a belt engaged with both pulleys, a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of the drive pulley. A cam is operatively connected with an accelerator pedal of a vehicle for shifting the spool of the transmission ratio control valve through a spring in accordance with depression of the accelerator pedal. A stopping device is provided for stopping the cam at a predetermined angular position, and a spring is provided between the cam and a shaft which is provided for rotatably supporting the cam and operatively connected to the accelerator pedal. Accordingly the accelerator pedal can be further depressed after the stop of the cam. The stopping device has a stop member operatively connected to the shiftable disc of the drive pulley so as to be moved with the movement of the disc in the upshift direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.