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Device and method for measuring high pressure leakage of injector nozzle matching part

A technology of fuel injectors and compression devices, which is applied in the direction of measuring devices, fuel injection devices, and charging systems, and can solve the problems of inability to test the seal of fuel injectors and structural strength assessment, and the inability to effectively inspect the high-pressure sealing of fuel injectors, etc. problem, to achieve the effect of simple structure

Active Publication Date: 2018-08-14
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The relevant tests on the fuel injector assembly cannot effectively test the high-pressure sealing of the fuel injector
In addition, the highest pressure that the existing fuel injector assembly can withstand also determines the test pressure of the fuel injector, and it is impossible to conduct a higher pressure (above 200MPa) sealing test and structural strength assessment of the fuel injector

Method used

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  • Device and method for measuring high pressure leakage of injector nozzle matching part

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific drawings.

[0026] like figure 1 As shown, the device for measuring the high-pressure leakage of the injector assembly in the present invention includes a test oil passage 8, a first flow meter 21, a second flow meter 22, a third flow meter 23, a first connecting pipe 51, a second connecting pipe The pipeline 52, the third connecting pipeline 53 and the fuel tank 6; the fuel injector assembly 1 is placed on the fuel injector fastening seat, and there are 9 pairs of clamping devices consisting of a clamping block 91, a piston 92, a spring 93 and tightening bolts The injector assembly is compressed with the set pressure to form the first sealing surface 4a and the second sealing surface 4b. The first sealing surface 4a is located outside the oil inlet of the injection nozzle assembly 1, and the second sealing surface The surface 4b is located inside the oil inlet of the nozzle assembly 1; ...

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Abstract

The invention relates to a device and a method for measuring high pressure leakage of an injector nozzle matching part. The device is characterized by comprising a test oil channel, a first flowmeter,a second flowmeter, a first connecting pipeline, a second connecting pipeline and an oil tank, wherein the injector nozzle matching part is placed on an injection nozzle fastening seat and is compressed by a compressing device at a set compressing force to form a first seal surface and a second seal surface, the first seal surface is located on the outer side of the oil inlet of the injector nozzle matching part and the second seal surface is located on the inner side of the oil inlet of the injector nozzle matching part; the first flowmeter is mounted on the first connecting pipeline to measure the leakage of the first seal surface, and the second flowmeter is mounted on the second connecting pipeline to measure the leakage of the second seal surface. By contrastive analysis of leakage and oil return quantity, the sealing property can be better evaluated. The device can be used for testing the sealing property of the injector nozzle matching part independently, and the obtained testresult is more accurate and effective.

Description

technical field [0001] The invention relates to a device and a method for measuring high-pressure leakage of a pair of fuel injection nozzles, belonging to the technical field of automobile diesel engines. Background technique [0002] With the continuous development of engine combustion technology, the requirements for the atomization effect of fuel injected into the cylinder are getting higher and higher. As a means to effectively improve the fuel atomization effect, increasing the injection pressure of the fuel system is more widely used in higher-level fuel systems. In addition, high power density engines need to inject more fuel within a certain period of time, and increasing the injection pressure of the fuel system is one of the important means to meet this requirement. Foreign companies such as BOSCH and DENSO have launched high-pressure common rail systems with injection pressures above 200 MPa to meet the requirements of engines for fuel atomization. [0003] As ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
CPCF02M65/006
Inventor 黄俊杨翔宇胡凯耀俞建达雷超徐广兰常青汪祥本董庆远
Owner CHINA FIRST AUTOMOBILE
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