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Gasoline direct injection rail

A gasoline direct injection, main body technology, used in low pressure fuel injection, low pressure fuel injection, fuel injection devices, etc., can solve problems such as stress corrosion cracking, and achieve the effects of excellent mechanical properties and rich strength changes

Inactive Publication Date: 2017-12-01
USUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the gasoline direct injection rail made of stainless steel is placed in a chlorine environment or if the fuel contains corrosive media such as chlorine, there is a concern that stress corrosion cracking will occur

Method used

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  • Gasoline direct injection rail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] in figure 1 , 2 In the description of Example 1 of the present invention, reference numeral 1 is an orifice member, which is formed of a stainless steel material. By forming the orifice member 1 from a stainless steel material in this way, it is not necessary to perform plating treatment to prevent rust and corrosion. In addition, the orifice member 1 is formed into a cylindrical shape provided with an orifice 2 in the longitudinal direction, and the outer peripheral surface thereof is as figure 1 A peripheral screw groove 3 is provided as shown.

[0021] On the other hand, on one end 5 of the rail main body 4 of the gasoline direct injection rail, an introduction portion 6 formed separately from the rail main body 4 is fixedly arranged. In addition, in this embodiment, as described above, the introduction portion 6 is formed separately from the rail main body 4, and the introduction portion 6 is fixedly arranged at the end 5 of the rail main body 4. However, in other diff...

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PUM

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Abstract

To obtain a gasoline direct injection rail for which plating treatment of a rail body and the inside of an inlet part can be simply and reliably performed, and which has an orifice and has superior mechanical properties. This gasoline direct injection rail is provided with: a steel rail body 4, an inlet part 6 integrally or separately provided on one end 5 of the rail body 4 and having a communication passage 7 therein which communicates with a fuel passage of the rail body 4; and a plurality of injector holders communicating with the fuel passage, the gasoline direct injection rail being characterized in that a stainless steel orifice member 1 formed separately from the rail body 4 is fixedly disposed in the communication passage 7 of the inlet part 6.

Description

Technical field [0001] The invention relates to a gasoline direct injection rail. Background technique [0002] The direct injection of gasoline engines has been popularized again in Europe around 2005. In recent years, most of the gasoline direct injection rails are made of stainless steel with excellent corrosion resistance. However, when a gasoline direct injection rail made of stainless steel is placed in a chlorine environment or when a corrosive medium such as chlorine is contained in the fuel, stress corrosion cracking may be caused. [0003] On the other hand, steel materials have various strength changes and are inexpensive, and therefore, in terms of higher pressure for future systems, they are superior in mechanical properties and cost than stainless steel materials, and become a material of interest. Therefore, recently, the demand for gasoline direct injection rails made of steel materials has increased. [0004] Patent Document 1: Japanese Patent Application Publicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/02F02M37/00F02M69/46
CPCF02M2200/8076F02M2200/9076F02M2200/05F02M2200/9053F02M55/025F02M37/0017F02M69/46Y02T10/12F02M37/00F02M55/02
Inventor 西泽洋行铃木秀司
Owner USUI CO LTD
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