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Measuring Method of Multiple Injection Fuel Injection Law

A technology of fuel injection and multiple injection, which is applied in measuring devices, fuel injection devices, and engine testing, and can solve problems such as the difficulty in obtaining the bulk elastic modulus K accurately and the influence of fuel injection rate measurement accuracy

Active Publication Date: 2021-02-02
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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  • Measuring Method of Multiple Injection Fuel Injection Law
  • Measuring Method of Multiple Injection Fuel Injection Law
  • Measuring Method of Multiple Injection Fuel Injection Law

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Experimental program
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Effect test

specific Embodiment 1

[0026] 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 , a data processing and control system composed of a controller 15, a computer 18, and peripheral equipment composed of a high-pressure oil pipe 13, an oil sump 14, and a connecting bolt 16, and is characterized in that: a constant volume chamber 1 is set on the main body of the measuring instrument, and a constant volume chamber An orifice filter 2 is installed at the bottom of the body, and pressure se...

specific Embodiment 2

[0037] 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 cavity is set on the main body, and an orifice filter is installed at the bottom of the constant volume cavity. Pressure sensors are respectively installed before and after the orifice filter to measure the pressure change before and after filtering. The upper part of the cavity is fixed by the fuel injector fixing bracket, the fuel injector goes deep into the cavity...

specific Embodiment 3

[0056] 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 cavity is set on the main body of the measuring instrument, and an orifice filter is installed at the bottom of the constant volume cavity. Pressure sensors are respectively installed before and after the orifice filter to measure the pressure change before and after filtering. Installed on the upper part of the measuring cavity and fixed by the fuel injector fixing bracket, the fuel i...

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Abstract

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. The multi-injection fuel injection rule measurement device includes: a cylindrical measuring constant volume cavity, an orifice filter, a fuel injector mounting bracket, a high-pressure oil pipe, an oil collection tank, connecting bolts, a fuel injector, a data processing and control system ; The fuel injector is installed on the top of the cylindrical measurement constant volume cavity through the mounting bracket, and the fuel injector is located on the axis of the cylindrical measurement constant volume cavity; the high pressure oil pipe is connected with the fuel injector; The feature is that the orifice filter is installed inside the cylindrical measurement constant volume cavity. The multiple-injection fuel injection law measurement method uses the Zeuch volume method to measure the fuel injection rate, and the high-frequency shock wave oscillation in the closed cavity during the high-pressure fuel injection process is weakened by adding an orifice filter 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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Patent Type & Authority Patents(China)
IPC IPC(8): F02M65/00
CPCF02M65/00
Inventor 刘龙赵豪刘禾梅齐昊
Owner HARBIN ENG UNIV