Coil for small diameter welded fuel injector
US5462231A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M51/0671
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The fuel inlet tube of a top-feed fuel injector has a larger O.D. proximate its inlet end than it does at its opposite end where a tubular non-ferromagnetic part is laser-welded to it. The through-hole in the coil's bobbin has a smaller diameter portion and a larger diameter portion, the larger diameter portion being disposed closer to the fuel inlet tube's inlet than is the smaller diameter portion. The larger diameter portion of the bobbin's through-hole and the smaller outside diameter portion of the fuel inlet tube are mutually axially overlapping to an extent that, during the fabrication process, the coil assembly can be disposed axially on the fuel inlet tube to a position allowing the laser-welding to be performed, and thereafter the coil assembly disposed to cover the laser-welded joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.