Dual clutch application area and control
US4875561A · kind A · utility
6Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1987 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/7109
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An adaptive clutch torque capacity control for an automotive vehicle clutch utilizing a dual area apply piston for engagement of the clutch plate for accurate control over a larger than normal torque range. The use of two piston areas allows one area to be controlled in a "coarse" fashion, while the other piston area, which is generally a small area, provides a "vernier" or fine adjustment control. The small area piston is controlled by an electronic closed loop for fine adjustment of any errors occurring in the "coarse" control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.