Invention Grant
- Patent Title: Terminal structure of high-pressure fuel pipe for direct injection engine
-
Application No.: US14380512Application Date: 2013-02-07
-
Publication No.: US09599080B2Publication Date: 2017-03-21
- Inventor: Iichiro Seino , Eiji Kurata
- Applicant: USUI KOKUSAI SANGYO KAISHA LTD.
- Applicant Address: JP
- Assignee: USUI KOKUSAI SANGYO KAISHA LIMITED
- Current Assignee: USUI KOKUSAI SANGYO KAISHA LIMITED
- Current Assignee Address: JP
- Agent Gerald E. Hespos; Michael J. Porco; Matthew T. Hespos
- Priority: JP2012-042529 20120228
- International Application: PCT/JP2013/052869 WO 20130207
- International Announcement: WO2013/129062 WO 20130906
- Main IPC: F02M55/02
- IPC: F02M55/02 ; F02M55/00 ; F16L13/08 ; F16L13/02 ; F16L41/08

Abstract:
Provided is a terminal structure of a high-pressure fuel pipe for a direct injection engine which can prevent stress concentration to a brazed portion between a pipe and a connection part effectively. In the terminal structure of a high-pressure fuel pipe for a direct injection engine where a connection head is brazed to an end of a fuel pipe, the end of the fuel pipe continued to a fuel pipe insertion portion of the connection head is provided with a drawn portion, an outer diameter D1 of the drawn portion to a fuel pipe diameter D satisfies 0.8D≦D1≦0.9D, and a length L1 of the drawn portion having the outer diameter D1 in a pipe-axial direction from an end of the fuel pipe insertion portion satisfies L1≧0.06D.
Public/Granted literature
- US20150027413A1 TERMINAL STRUCTURE OF HIGH-PRESSURE FUEL PIPE FOR DIRECT INJECTION ENGINE Public/Granted day:2015-01-29
Information query