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fuel rail

A fuel distribution pipe and fuel technology, applied in fuel injection devices, special fuel injection devices, charging systems, etc., can solve problems such as the inability to ensure the corrosion resistance of the sealing surface, and achieve the effect of ensuring corrosion resistance and inhibiting pollution

Active Publication Date: 2020-07-17
SANOH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the high-pressure fuel supply device described in Patent Document 1, since no plating is formed on the sealing surface, the corrosion resistance of the sealing surface cannot be ensured against fuels such as alcohol fuel and degraded fuel.

Method used

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Examples

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Effect test

Embodiment 1

[0086] First, the pipe part, the plurality of cup-shaped parts, and the connection part as the base material are temporarily welded, and they are placed in a furnace and brazed. Next, an electroless nickel plating layer is formed on the entire surface of the base material. Next, in a state where the auxiliary cathode is arranged near the sealing surface of the connection part, a zinc-nickel plating layer is formed on the base material (refer to Figure 8 ). At this time, the zinc-nickel plating layer formed on the sealing surface was adjusted so that the thickness of the zinc-nickel plating layer formed on the outer peripheral surface was 80%. Thus, the fuel distribution pipe of Example 1 in which the zinc-nickel plating layer formed on the sealing surface is thinner than the zinc-nickel plating layer formed on the outer peripheral surface (refer to Image 6 ). Regarding the fuel distribution pipe of Example 1, five were produced.

Embodiment 2

[0088] Except that the zinc-nickel plating layer formed on the sealing surface was adjusted so that the thickness of the zinc-nickel plating layer formed on the outer peripheral surface was 50%, the fuel distribution pipe of Example 2 was obtained by the same method as that of Example 1 (refer to Image 6 ). Regarding the fuel distribution pipe of Example 2, five were produced.

Embodiment 3

[0090] Except that the zinc-nickel plating layer formed on the sealing surface was adjusted to have a layer thickness of 30% of the zinc-nickel plating layer formed on the outer peripheral surface, the fuel distribution pipe of Example 3 was obtained by the same method as Example 1 (refer to Image 6 ). Regarding the fuel distribution pipe of Example 3, five were produced.

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Abstract

A fuel distribution tube, which connects with fuel pipe and distributes the fuel to multiple fuel spraying devices. The above -mentioned fuel distribution tube is: tube -like mother material, which constitutes the main body of the above fuel distribution tube;On the surface of the mother material, the above -mentioned parent material has a seal, which is formed on the inner surface of the above -mentioned mother material and pressing with the above -mentioned fuel.The thickness of the above coating is thin.

Description

Technical field [0001] The present invention relates to a fuel distribution pipe for distributing and supplying fuel to a plurality of fuel injection devices. Background technique [0002] In a direct injection engine or the like, a fuel distribution and supply device is used to distribute and supply high-pressure fuel compressed by a high-pressure pump to a plurality of fuel injection devices. In this fuel distribution and supply device, a fuel distribution pipe for distributing and supplying fuel to a plurality of fuel injection devices is detachably connected to a fuel pipe, and the fuel pipe is connected to a high-pressure pump. In addition, a connection head is provided at the end portion of the fuel piping on the fuel distribution pipe side, and a sealing surface to which the connection head is crimped is provided at the end portion of the fuel distribution pipe on the fuel piping side. [0003] The fuel distribution pipe generally uses stainless steel such as SUS as a raw m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M55/02
CPCF02M55/025F02M2200/9046F02M2200/05F02M2200/9038C23C18/32C23C18/48F02M2200/856F02M2200/9053C23C30/00C23C28/3225C23C28/322C23C28/32
Inventor 丰岛秀树金谷贤人
Owner SANOH IND CO LTD