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A method and device for fault monitoring of an injection valve

A technology of fault monitoring and injection valve, which is applied in the direction of measuring device, mechanical valve test, engine test, etc., can solve the problems that the failure of injection valve cannot be monitored, and the speed of damage can be accelerated, so as to ensure timely detection and elimination, and guarantee Safe to use

Active Publication Date: 2021-11-19
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the existing monitoring methods cannot detect the failure of the injection valve, and the injection valve will work under abnormal parameters for a long time, which will accelerate its damage

Method used

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  • A method and device for fault monitoring of an injection valve
  • A method and device for fault monitoring of an injection valve
  • A method and device for fault monitoring of an injection valve

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Embodiment Construction

[0057]The injection valve is a part of the gas fuel engine, which is used to inject fuel into the combustion chamber for combustion. Therefore, when the injection valve is damaged, it will directly cause the engine to fail to work. And because the injection valve is directly connected to the combustion chamber, it will be in a state of high temperature and vibration during work, so it is not convenient to directly install sensors inside the injection valve for fault monitoring. Therefore, at present, the failure of the injection valve is basically monitored by the elimination method. If the engine power is insufficient but no failure of other engine components is detected, it indicates that the injection valve has a certain probability of failure, and further monitoring of the engine can determine and eliminate the failure of the injection valve.

[0058] However, the electronic control system of the engine also has closed-loop control systems such as closed-loop control of s...

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Abstract

This application provides a method and device for monitoring injection valve faults. Firstly, during the engine startup process, the first rail pressure of the gas guide rail before the injection valve is opened is collected, and after the engine starts running for the first time, the gas pressure is collected. The second rail pressure of the guide rail; then make a difference between the first rail pressure and the second rail pressure to obtain the rail pressure drop value; finally compare the rail pressure drop value with the preset drop threshold value; determine according to the comparison result The injection valve is currently operating normally, leaking, or blocked. Because various closed-loop control systems are not activated when the engine starts to ignite, the gas rail pressure is only related to the working time and working state of the injection valve at this time; the working state of the injection valve can be accurately judged by using the rail pressure drop value, which is quite Because the influence of other control systems is eliminated, the fault of the injection valve can be accurately monitored, and the timely detection and elimination of the fault can be further ensured, so as to ensure the safety of users.

Description

technical field [0001] The present application relates to the technical field of engines, in particular to a method and device for monitoring injection valve faults. Background technique [0002] The injection valve is the final execution part for fuel supply in the gas fuel engine, which can be used to inject gas fuel into the combustion chamber for combustion, and is a key device to ensure the normal operation of the gas engine. However, as the use time increases, a series of problems such as aging and clogging of the injection valve will occur, which will cause the engine to fail to operate normally. Since the injection valve is small in size and located in the combustion chamber of the engine, it is not convenient to directly install sensors for fault monitoring. [0003] In order to solve this problem, it is currently possible to judge whether the injection valve is malfunctioning by measuring the power of the engine and other parameters. When other parameters of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/003G01M3/28G01M15/00
CPCG01M3/2876G01M15/00G01M13/003
Inventor 曹石田常玲
Owner WEICHAI POWER CO LTD
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