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Multi-injection fuel injection rule measuring device and measuring method thereof

A fuel injection and multi-injection technology, which is used in measurement devices, fuel injection devices, charging systems, etc., can solve the problems of the difficulty of obtaining the bulk elastic modulus K accurately and the influence of the measurement accuracy of the fuel injection rate, so as to reduce flooding, The effect of reducing distractions

Active Publication Date: 2019-02-26
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Since the bulk modulus K of the fuel is difficult to obtain accurately, it will also affect the measurement accuracy of the fuel injection rate

Method used

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  • Multi-injection fuel injection rule measuring device and measuring method thereof
  • Multi-injection fuel injection rule measuring device and measuring method thereof
  • Multi-injection fuel injection rule measuring device and measuring method thereof

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specific Embodiment 1

[0025] The high-precision fuel injection rate detection device suitable for multiple injections of the present invention includes a cylindrical measuring constant volume cavity 1, an orifice filter 2 installed at the bottom of the cylindrical cavity, a fuel injector mounting bracket 3, a fuel injection The main body of the measuring instrument composed of a device 17 and two pressure sensors 4 and 5, a temperature sensor 6, a volume regulating valve 7, a safety valve 8, a high-speed discharge valve 9, a volume flowmeter 10, an external circuit 11, and a data acquisition card 12 , the data processing and control system that controller 15, computer 18 are formed and the peripheral equipment that high-pressure oil pipe 13, oil sump 14, connecting bolt 16 are formed, it is characterized in that: fixed volume chamber 1 is set on measuring instrument main body, the bottom of constant volume chamber The orifice filter 2 is installed, and the pressure sensors 4 and 5 are respectively i...

specific Embodiment 2

[0035] The high-precision fuel injection rate detection device suitable for multiple injections of the present invention includes a cylindrical measuring cavity, an orifice filter, two pressure sensor mounting brackets at the upper and lower parts, a temperature sensor mounting bracket, and a valve mounting bracket. The main body of the measuring instrument and the data processing and control system composed of two pressure sensors, one temperature sensor, volume regulating valve, safety valve, high-speed discharge valve, volume flowmeter, external circuit and computer, etc., are characterized by: A constant volume chamber is set on the main body, and an orifice filter is installed at the bottom of the constant volume chamber. Pressure sensors are installed before and after the orifice filter to measure the pressure change before and after filtering. The fuel injector is installed in the measuring chamber along the axis of the cylindrical cavity. The upper part of the fuel inje...

specific Embodiment 3

[0053] A high-precision multi-injection fuel injection rate detector equipped with an orifice filter, including a cylindrical measuring cavity, an orifice filter, two pressure sensor mounting brackets at the upper and lower parts, a temperature sensor mounting bracket and a valve mounting bracket The main body of the measuring instrument and the data processing and control system composed of two pressure sensors, one temperature sensor, volume regulating valve, safety valve, high-speed unloading valve, volume flow meter, external circuit and computer, etc., are characterized by: A constant volume chamber is set on the main body of the measuring instrument, and an orifice filter is installed at the bottom of the constant volume chamber. Pressure sensors are installed before and after the orifice filter to measure the pressure change before and after filtering. The fuel injector is installed along the axis of the cylindrical cavity. The upper part of the measurement cavity is fix...

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Abstract

The invention belongs to the technical field of diesel engines, and particularly relates to a multi-injection fuel injection rule measuring device and a measuring method thereof. The multi-injection fuel injection rule measuring device comprises a cylindrical measuring constant volume cavity 1, an orifice plate filter 2, an oil injector mounting bracket 3, a high-pressure oil pipe 13, an oil collecting groove 14, a connecting bolt 16, an oil injector 17 and a data processing and controlling system; the fuel injector 17 is arranged on the top of the cylindrical measuring constant volume cavity1 through the mounting bracket 3, and the oil injector 17 is arranged on the axis of the cylindrical measuring constant volume cavity 1; the high-pressure oil pipe 13 is connected with the oil injector 17; the device is characterized in that the orifice plate filter 2 is arranged inside the cylindrical measuring constant volume cavity 1. According to the multi-injection fuel injection rule measuring method, the fuel injection rate is measured by using a Zeuch volume method, and high-frequency shock wave oscillation in a closed cavity in the high-pressure fuel injection process is weakened by additionally arranging the orifice plate filtering device.

Description

technical field [0001] The invention belongs to the technical field of diesel engines, and in particular relates to a measuring device and a measuring method for multiple injection fuel injection rules. Background technique [0002] With the popularization of high-pressure common rail technology for internal combustion engines, accurate measurement of multiple injection fuel injection rates has become more and more important for improving the overall efficiency and overall performance of internal combustion engines, and promoting energy saving and emission reduction. Among the patents on fuel injection rate measurement published by the State Intellectual Property Office, five patented technical solutions, CN107061095A, CN101571090, CN201554584U, CN103195633A and CN203230513U, which use the volumetric method to measure fuel injection rate and are relatively close to this patent, but the above patented technologies only It is suitable for measuring a single injection, and the ...

Claims

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Application Information

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IPC IPC(8): F02M65/00
CPCF02M65/00
Inventor 刘龙赵豪刘禾梅齐昊
Owner HARBIN ENG UNIV
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