Control system for an infinitely variable transmission
US4612828A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Apr 16, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2702/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An infinitely variable belt-drive transmission is provide with a D/L-range as one of operating ranges. The system has a transmission ratio control valve comprising a spool which is moved in the downshift direction to downshift the transmission and in the upshift direction opposite to the downshift direction to upshift the transmission. An actuator is provided for moving the spool. When an accelerator pedal of a motor vehicle is depressed at the D/L-range, the actuator operates to move the spool in the downshift direction and when the accelerator pedal is released at the D/L-range, the actuator operates to move the spool in the upshift direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.