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Measuring device for injection hole pressure of engine fuel oil injection system

A technology of fuel injection system and measuring device, which is applied in the direction of fuel injection device, engine test, measuring device, etc., can solve the problem of difficult measurement of pressure chamber, and achieve the effect of controllable geometric size and guaranteed accuracy

Active Publication Date: 2018-11-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that it is extremely difficult to measure the pressure chamber and nozzle pressure without affecting the normal injection of the injection system as much as possible

Method used

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  • Measuring device for injection hole pressure of engine fuel oil injection system
  • Measuring device for injection hole pressure of engine fuel oil injection system
  • Measuring device for injection hole pressure of engine fuel oil injection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a measuring device for the nozzle pressure of the engine fuel injection system, see the attached figure 1 , including: high-pressure fuel supply module, fuel injection module, pressure acquisition module and picture acquisition module;

[0035] The high-pressure fuel supply module includes: a high-pressure pump 1 and a high-pressure common rail 3; the output end of the high-pressure pump 1 is connected to the input end of the high-pressure common rail 3 through a pipeline, the high-pressure pump 1 is used to pressurize the fuel, and the high-pressure common rail 3 Used to ensure the stability of fuel injection pressure;

[0036] The fuel injection module includes: a fuel injector 4 and a visual panel 11; see the attached figure 2 , the visible plate 11 is processed with a mounting hole 15 matched with the oil outlet end of the injector 4 and a circular through hole coaxial with the mounting hole 15 and communicated with the circular through ho...

Embodiment 2

[0045] This embodiment provides another measuring device for the nozzle pressure of the engine fuel injection system, see the attached image 3 , except that one end of the pressure acquisition channel 12 communicates with the conical frustum hole 14 and the other end communicates with the nozzle 13, the rest of the components and connections are the same as in Embodiment 1 for measuring the pressure in the nozzle 13.

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Abstract

The invention disclose a measuring device for injection hole pressure of an engine fuel oil injection system, and belongs to the technical field of engine testing and measurement. The measuring devicecomprises a high pressure oil supply module, an oil injector, a visible plate, a pressure collection connection block and a pressure sensor. The high pressure oil supply module is used for pressurizing fuel oil and supplying fuel oil to the oil injector, and a cavity at the crossed position of a nozzle and an installation hole in the visible plate is a pressure chamber. The visible plate is further provided with a conical frustum hole and a pressure collection channel communicating with the pressure chamber. The oil inlet end of the oil injector is connected with the high pressure oil supplymodule, the oil outlet end of the oil injector is installed in the installation hole in the visible plate, one end of the pressure collection connection block is connected with the pressure sensor, aconical frustum at the other end is installed in the conical frustum hole in the visible plate, and a pressure transfer channel communicating with the pressure collection channel is machined in the conical frustum. The measuring device is applied to an internal combustion engine, and can measure the pressure of the nozzle and the pressure chamber in an injection hole of the internal combustion engine, thereby obtaining the flow flowing through the injection hole through calculation.

Description

technical field [0001] The invention belongs to the technical field of engine testing and measurement, and in particular relates to a measuring device for the pressure of an injection hole of an engine fuel injection system. Background technique [0002] As we all know, the combustion of a diesel engine directly affects a series of indicators such as its power, economy, and emission characteristics, and the quality of fuel atomization determines the quality of fuel combustion. A good atomization effect is the premise of high-efficiency combustion. Clean emissions are also of great importance. Recent studies have found that the vicinity of the pressure chamber inside the nozzle is the primary area of ​​cavitation, which has a great relationship with the sudden drop of fuel pressure in the pressure chamber. In addition, if the pressure drop in the pressure chamber is not ideal, it will have an extremely important impact on the subsequent spraying. Therefore, measuring the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
CPCF02M65/003
Inventor 王字满戴晓宇刘福水李佳峰李志爽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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