Split rotor cooling fan clutch
US5896964A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Jun 2, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2037/005
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A split rotor cooling fan clutch includes an input member that is constantly driven at engine speed, or at some selected proportion thereof. An output member is journaled on the input member so as to be supported thereon in a substantially nonrotating state when decoupled and alternately, to be concentrically rotatable in concert therewith at a variety of speeds. A space presented between the input and output members contains a quantity of magnetorheological fluid. An engagement mechanism includes the split rotor and coil, with a ferromagnetic element positioned to define an operative gap between the rotor and the ferromagnetic element. The coil is selectively energized with a given current to result in a torque transfer between the input and output elements that provides a rotational speed of the fan tailored to the cooling requirements of the associated engine. Internal heat generation is managed electronically to prevent overheating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.