Throttle valve control device
US5996554A · kind A · utility
14Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Feb 12, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D11/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A throttle valve control device is composed of a stator core with a solenoid and a rotor carrying a throttle valve. The rotor has a pair of poles which is composed of one or a plurality of rare-earth-metal permanent magnets magnetized in the radial thickness direction. The stator core has an inner periphery sorounding the rotor, and the inner periphery is smooth with no slot so that uniform distribution of magnetic flux can be formed in the inner periphery, thereby reducing the detent torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.