Control apparatus for use of a continuously variable transmission
US4601680A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2702/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control apparatus for use of a continuously variable transmission. The apparatus controls a rate of changing a RPM ratio in a continuously variable transmission connected to the engine. The transmission has a driving pulley mounted on an input shaft a driven pulley mounted on an output shaft, and an endless belt member spanning the pulleys so that an effective diameter of the pulleys can be varied at different rates with regard to each other so that different speed ratios can be obtained. When a prompt acceleration of a vehicle is required by an operator, a flow control device drains an amount of oil in a hydraulic cylinder of the driving pulley within a first prescribed time period. During a second prescribed time period after the first prescribed time period elapses, a second control device stops the draining of oil in the hydraulic cylinder, thereby maintaining a RPM ratio in a continuously variable transmission to the value at the time when the first prescribed time period elapses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.