Connecting head structure for high-pressure fuel injection pipes
US8186724B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2007 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Apr 4, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/8053
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A thick-wall small-diameter high-pressure fuel injection pipe has a spherical seat surface, an annular flange, and a conical surface continued from the seat surface at a connecting end of the pipe. If the pipe is configured so that t (thickness)/D (outer diameter)<0.3, then an axial distance from the connecting head end to the back face of the annular flange is 0.38D to 0.6D, a spherical radius of the seat surface is 0.45D to 0.65D, the annular flange outer diameter is 1.2D to 1.4D, and an inner peripheral surface of the head has a substantially flat cylindrical surface or a conical surface. If the pipe is configured so that t (thickness)/D (outer diameter)≧0.3, then the axial distance from the connecting head end to the back face of the annular flange is 0.38D to 0.7D.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.