Method for assembling and hardening a ball plug in a counterbore of a fuel injector nozzle assembly
US6679953B1 · kind B1 · utility
1Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jun 26, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/26
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
According to the method of the present invention, the ball plug is press fit into the counterbored passage of a fuel injector nozzle assembly prior to hardening of the fuel injector nozzle assembly. A core hardening and gas nitriding process is then applied to the assembly, causing the ball plug to expand and the passage diameter to shrink. This results in a greatly increased seal between the ball plug and the passage, and substantial elimination of the gaps experienced therebetween in prior art fuel injector nozzle assemblies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.