Gasoline direct injection high-pressure fuel distribution pipe manufacturing method

A technology of high-pressure fuel oil and in-cylinder direct injection, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of low structural pressure bearing capacity, achieve high pressure resistance, good sealing performance, and reduce safety hazards Effect

Inactive Publication Date: 2015-08-26
SHANGHAI USUI ENGINE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the improvement of engine performance requirements, the fuel pressure will increase, and the pressure resistance requirements for the fuel rail will also be higher, and the pressure bearing capacity of the existing structure is relatively low

Method used

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  • Gasoline direct injection high-pressure fuel distribution pipe manufacturing method
  • Gasoline direct injection high-pressure fuel distribution pipe manufacturing method
  • Gasoline direct injection high-pressure fuel distribution pipe manufacturing method

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Experimental program
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Embodiment 1

[0047] Please see attached figure 1 , 2, 3, 4, 5, 6, a kind of manufacture method of direct injection gasoline engine high-pressure fuel distribution pipe in cylinder, its specific steps are:

[0048] (1) Hot forging the main rail blank, the shape of the main rail blank is a round solid stainless steel metal rod with an outer diameter of 15-40mm;

[0049] The main rail is composed of the main pipe, injector seat, oil inlet joint and mounting bracket;

[0050] The main body of the main rail is a tube type.

[0051] (2) Process the plane and holes of the mounting brackets: the mounting brackets are evenly distributed on the main rail blank, the interval between adjacent mounting brackets is 10-200mm, and the number of mounting brackets is 2-10;

[0052] The center of the mounting bracket is provided with a circular hole, such as Figure 6 shown;

[0053] (3) Process the planes at both ends of the main rail blank, remove the forging surface, and make the two ends form a circu...

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Abstract

The invention relates to a gasoline direct injection high-pressure fuel distribution pipe manufacturing method. The method includes the specific steps that 1, hot forging forming is conducted on a main rail blank; 2, the plane and holes are machined in mounting supports; 3, the planes of the two ends of the main rail blank are machined, the forged surface is removed, the two ends are made to be circular planes, and the planes are perpendicular to the center line of a main pipe; 4, deep hole machining is conducted, 5, the sensor corresponding side on the main rail blank is machined, 6, the plug corresponding side on the main rail blank is machined; 7, an oil injection connector on the main rail blank is machined; 8, oil spray device bases are machined; 9, cleaning is conducted; 10, a plug is mounted; 11, a sensor is arranged; 12, a product obtained after sealing detection is conducted is sealed. The product obtained through the method is good in sealing performance, relatively small in part number, free of risk of deformation and leakage due to rack of fusion, relatively simple in process and free of brazing process and the like, energy sources are saved, and the potential safety hazards existing in machining are reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of high-pressure fuel distribution pipes for in-cylinder direct-injection gasoline engines, in particular to a method for manufacturing high-pressure fuel distribution pipes for in-cylinder direct-injection gasoline engines. 【Background technique】 [0002] With the development of engine technology, the pressure in the fuel rail of the direct injection engine will gradually increase, and the normal fuel pressure of the existing fuel rail is about 200bar. The existing in-cylinder direct-injection engine oil rail is generally a stainless steel pipe, the two ends of which are welded with plugs and closed, and the stainless steel pipe is welded with a fuel injector seat, an oil inlet pipe joint, a sensor joint, a mounting seat, a wire harness bracket, etc. [0003] With the improvement of engine performance requirements, the fuel pressure will increase, and the pressure resistance requirements for the fuel rail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/02
Inventor 王玉毛国豪何丹风
Owner SHANGHAI USUI ENGINE PARTS
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