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Test method and device for injection pressure of fuel injector

A technology of fuel injection pressure and testing equipment, which is applied in the direction of machine/structural component testing, measuring equipment, fuel injection equipment, etc., and can solve the problems of increasing testing costs, fuel injectors can no longer be used, and enlargement, etc.

Inactive Publication Date: 2017-08-11
CHINA NORTH ENGINE INST TIANJIN
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  • Description
  • Claims
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Problems solved by technology

This method has several disadvantages: 1. Strict requirements on sealing, which increases the cost of non-standard processing; 2. After the injector is drilled and the pressure sensor is installed, the injector can no longer be used, which further increases the test cost; 3. The test measures the pressure curve of the oil tank, and there is a certain difference between the pressure curve of the oil tank and the injection pressure curve before the injection hole, and this difference increases with the increase of the engine load

Method used

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  • Test method and device for injection pressure of fuel injector
  • Test method and device for injection pressure of fuel injector
  • Test method and device for injection pressure of fuel injector

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Embodiment Construction

[0020] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0022] The test device for the fuel injection pressure of the fuel injector according to the embodiment of the present invention, such as figure 1 As shown, it includes the injector pressure plate 2, the pressing device 3 and the fuel injection regularity tester 4. When the nozzle end of the fuel injector 1 to be tested is placed in the connecting hole of the fuel injection regularity tester 4, the fuel injector pressure plate 2 It is stuck in the middle of the injector 1 to be tested, one end is connected to the fixed injector pressure plate 2 through a plurality of pressing devices 3, and the other end is fixedly connected to the fuel injection regulari...

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Abstract

The invention provides a test method and device for injection pressure of a fuel injector. The device comprises a fuel injector (1) to be tested, a fuel injector pressing plate (2), a compressing device (3) and a fuel injection law tester (4), wherein the fuel injector (1) to be tested is put in a connecting hole of the fuel injection law tester (4) and is compressed on the fuel injection law tester (4) through the fuel injector pressing plate (2) and the compressing device (3). The fuel injection rate curve of the fuel injector (1) to be tested is measured, an injection hole flow calculation formula is utilized to obtain the injection pressure curve of the fuel injector, and therefore the device can obtain the more accurate injection pressure curve.

Description

technical field [0001] The invention belongs to the technical field of testing the fuel injection pressure of a fuel injector, in particular to a method and a device for testing the fuel injection pressure of a fuel injector. Background technique [0002] With the increasingly stringent emission regulations, the comprehensive performance requirements for engine fuel injectors are constantly increasing. A large number of studies have shown that the injection pressure of the fuel injector has an important influence on the performance and emission of the engine, which needs to be further studied. However, the compact structure of the engine injector, especially the small diameter of the nozzle coupler of the injector, makes it impossible to directly measure the actual injection pressure before the injection hole, which increases the difficulty of analysis. [0003] In order to obtain a more accurate fuel injection pressure, the general method is as follows: open a hole at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
CPCF02M65/00
Inventor 吴小军李亚芬奚星顾娇娇孙树平李汝宁王敏郭海洲
Owner CHINA NORTH ENGINE INST TIANJIN
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