Control system for a continuously variable transmission
US4782934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Jan 2, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66259
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control system for a motor vehicle provided with a continuously variable transmission and a clutch for transmitting power of an engine to the transmission. The transmission has a transmission ratio control valve having ports and a spool for controlling the transmission ratio. A throttle position sensor is provided for detecting the load on an engine and for deciding a desired transmission ratio in accordance with the load. The clutch is automatically disengaged at low vehicle speed. When an accelerator pedal is depressed in order to re-accelerate the vehicle, the desired transmission ratio is increased to increase the speed of a drive pulley of the transmission so that the drive pulley speed equals the speed of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.