Attaching method of fuel rail assembly for direct-injection engine
US9133799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2012 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Dec 10, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49231
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An injector comprises a cylindrical body portion, a holding ring capable of centering an axial center of the injector, and a small-diameter cylindrical portion. There are provided an assembly forming step of forming a fuel rail assembly by inserting the injectors into respective cup portions via spring members for reaction force absorption, a press inserting step of pressing and inserting respective tip-side portions of the injectors by pressing pressure-receiving portions such that the respective spring members are compressed up to a middle compressive state thereof with a pressing movable apparatus which is capable of pressing the pressure-receiving portions of a fuel rail via respective pressing springs, and a fastening step of fastening plural boss portions concurrently to a cylinder head in a state in which a pressing force of the press inserting step is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.