System for controlling hydraulic fluid pressure for V-belt type automatic transmission
US5088352A · kind A · utility
28Cited by
11References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | May 8, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19102
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission includes a gear power train and a V-belt type continuously variable power train which are connected in parallel between input and output shafts. A relatively low hydraulic fluid pressure is supplied to a follower pulley cylinder chamber when the V-belt type continuously variable power train is rendered inoperable, whereas a sufficiently high hydraulic fluid pressure is supplied to the follower pulley cylinder chamber when the V-belt type continuously variable power train is rendered operable, inducing a sufficiently high force which the follower pulley grips the V-belt with.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.