High pressure fluid connection

Patent metadata

Field	Value
Publication number	US-10480470-B2
Application number	US-201414902958-A
Country	US
Kind code	B2
Filing date	Jun 25, 2014
Priority date	Jul 5, 2013
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A fuel injection system for an internal combustion engine includes an injector having a first orifice to which is tightly connected a pipe having a matching first orifice. Both orifices are surrounded with peripheral smooth surfaces that are complementary surfaces sealingly pressed against each other by a clamping plate.

First claim

The invention claimed is:

1. A fuel injection system for an internal combustion engine, the fuel injection system comprising:
an injector having a first orifice;
a clamping plate; and
a pipe tightly connected to said first orifice of said injector, said pipe having a matching first orifice such that said first orifice of said injector is surrounded by a first peripheral smooth surface and said matching first orifice of said pipe is surrounded by a second peripheral smooth surface sealingly pressed against said first peripheral smooth surface by said clamping plate, and wherein said pipe is cylindrical, with said matching first orifice extending radially through said pipe such that said second peripheral smooth surface of said pipe is an outer cylindrical surface of said pipe and said first peripheral smooth surface of said injector is a matching surface of a groove arranged on said injector;
wherein said pipe is engaged between a lower surface of said clamping plate and an upper surface of said injector, and a screw is inserted through said clamping plate and threaded into said injector so that said clamping plate and said injector are pulled toward each other and so that said second peripheral smooth surface of said pipe and said first peripheral smooth surface of said injector are sealingly pressed against each other; and
wherein said injector and a first extremity of said clamping plate each have complementary hooks, such that said injector and said first extremity of said clamping plate are engaged via said complementary hooks, said screw being tightened at a second extremity of said clamping plate opposed to said hook of said clamping plate so that said pipe engaged between said lower surface of said clamping plate and said upper surface of said injector is fixed by a radial compression force.

Assignees

• Delphi Tech Ip Ltd

Inventors

• Graham Mark S
• Harcombe Anthony T

Classifications

• F02M2200/855

  using clamp elements or fastening means, e.g. bolts or screws · CPC title

• F02M55/02

  Conduits between injection pumps and injectors {, e.g. conduits between pump and common-rail or conduits between common-rail and injectors} · CPC title

• F02M61/14 Primary

  Arrangements of injectors with respect to engines; Mounting of injectors · CPC title

• F02M55/005

  for high pressure conduits, e.g. connected to pump outlet or to injector inlet · CPC title

• F02M2200/803

  using clamp elements and fastening means; e.g. bolts or screws · CPC title