Hydraulic control system for continuously variable transmission
US4712453A · kind A · utility
10Cited by
19References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Feb 24, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/6618
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control arrangement for a continuously variable transmission includes an electronic control system and a hydraulic control system. In the hydraulic control system solenoid valves are used in conjunction with fluid control valves to regulate the various fluid pressure levels in the system. A variable displacement pump provides fluid under pressure in the main line. A modulator valve, connected to the main line, provides a controlled low pressure to the various control assemblies. Thus the solenoid valve and associated components can be more economical than in those systems where only the normal line pressure arrangement is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.