Automotive emission control valve having two-part solenoid pole piece
US5924675A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/68
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An automotive emission control valve including a body having an internal main flow passage between a first port and a second port, a valve seat circumscribing a transverse cross-sectional area of the passage, a valve member with a stem and a head that seats on and unseats from the valve seat, an actuator that operates the valve member. The actuator provides a magnetic circuit path that includes respective pole pieces at respective opposite axial ends of the actuator. At least one of the pole pieces being a two-part pole piece including a central hub part joined to an outer rim part that is disposed circumferentially about the central hub part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.