Method of manufacturing fuel rail for gasoline direct injection
US11015231B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2019 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Jan 17, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/9053
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To obtain, at low cost, a fuel rail that maintains low hardness and good formability before being formed into a tube stock, can be made to form a welded pipe, and has high-strength properties with which the fuel rail can withstand a high fuel pressure even when formed so as to be relatively thin. A fuel rail for gasoline direct injection that is used at a fuel pressure of at least 30 MPa and is formed from an iron-alloy welded pipe. The fuel rail comprises an iron alloy that contains chemical components of C, Si, Mn, P, S, Nb, and Mo. The plate thickness t and the outer diameter D of the fuel rail have a ratio t/D of 0.2 or less. A bainitic structure can be precipitated by brazing the fuel rail in a furnace during manufacturing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.