Apparatus for controlling line pressure used in V-belt type continuously variable transmission for automobile
US4669336A · kind A · utility
38Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1985 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Jan 22, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66259
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A continuously variable transmission (CVT) has input and output pulleys interconnected by a V-belt. The output pulley is actuated by a line pressure. A throttle pressure is increased as the position of an intake throttle valve arranged in an intake path is increased. A transmission-ratio pressure is decreased as the position of the intake throttle valve is increased. The transmission-ratio pressure is decreased in the region of smaller openings of the intake throttle valve more gently than in the region of larger ones. The line pressure is produced in relation to the throttle pressure and the transmission-ratio pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.