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Urea liquid level real-time detection method and system

A technology of real-time detection and urea solution, which is applied in the direction of buoy liquid level indicator, liquid/fluid solid measurement, measuring device, etc. It can solve the problems of large liquid level display intervals, jumps, and inability to judge urea consumption in real time, and achieve Improve user experience, ensure continuity, and ensure stability

Active Publication Date: 2019-12-20
一汽解放青岛汽车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor can avoid the interference of external factors and pressure, has very reliable stability, and can output multiple liquid level signals, and multiple sets of magnetic control units cannot solve the problem of liquid level accuracy errors caused by the length of a single magnetic control unit
[0006] At present, the instrument panel of the vehicle displays the urea liquid level in the urea tank in real time in the form of a percentage. When the reed switch type urea liquid level sensor is used, the liquid level display interval is too large, and the accuracy of the urea liquid level under transient conditions cannot be guaranteed.
During the driving process of the vehicle, the urea liquid level stays at one position for a long time, and when the urea liquid level changes, it will jump, causing the user to be unable to judge the consumption of urea in real time, affecting the user's use and experience

Method used

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  • Urea liquid level real-time detection method and system
  • Urea liquid level real-time detection method and system
  • Urea liquid level real-time detection method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] The present embodiment provides a real-time detection method for urea liquid level, and the real-time detection method comprises the following steps:

[0110] S100, collecting and obtaining the filtered urea liquid level, and proceeding to step S101 for logical judgment;

[0111] S101, judging whether the filtered urea liquid level is lower than 100%, if the judging result is yes, go to step S102;

[0112] S102, collect and acquire the data of urea injection quality, urea density and urea tank volume, and enter step S104;

[0113] S104, calculate the urea consumption after the liquid level change of the urea tank through the data collected in step S102, and enter step S200 for logic judgment;

[0114] S200, judging whether the urea consumption is within the preset value range, if the judging result is yes, go to step S201;

[0115] S201. Calculate the displayed liquid level of the urea tank according to the urea consumption and the filtered urea liquid level data, and...

Embodiment 2

[0118] The present embodiment provides a real-time detection method for urea liquid level, and the real-time detection method comprises the following steps:

[0119] S100, collecting and obtaining the filtered urea liquid level, and proceeding to step S101 for logical judgment;

[0120] S101, judging whether the filtered urea level is lower than 100%, if the judging result is no, go to step S103;

[0121] S103. Determine the filtered urea liquid level as the displayed liquid level of the urea tank, and proceed to step S300;

[0122] S300. Send the displayed liquid level data of the urea tank to the display unit for the user to view. At this time, the user sees the full liquid level of the urea tank, and the process ends.

Embodiment 3

[0124] The present embodiment provides a real-time detection method for urea liquid level, and the real-time detection method comprises the following steps:

[0125] S100, collecting and obtaining the filtered urea liquid level, and proceeding to step S101 for logical judgment;

[0126] S101, judging whether the filtered urea liquid level is lower than 100%, if the judging result is yes, go to step S102;

[0127] S102, collect and acquire the data of urea injection quality, urea density and urea tank volume, and enter step S104;

[0128] S104, calculate the urea consumption after the liquid level change of the urea tank through the data collected in step S102, and enter step S200 for logic judgment;

[0129] S200, judging whether the urea consumption is within the preset value range, if the judging result is no, go to step S202;

[0130] S202, enter step S203 after sending out the fault prompt message;

[0131] S203. Determine the filtered urea liquid level as the displayed...

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Abstract

The invention provides a urea liquid level real-time detection method and a urea liquid level real-time detection system. The urea liquid level real-time detection method comprises the steps of: (I) acquiring a urea liquid level after filtering, urea injection mass, urea density and urea tank volume data, and calculating urea consumption; (II) and calculating the urea consumption and the urea liquid level after filtering to obtain a urea display liquid level. The urea liquid level real-time detection method and the urea liquid level real-time detection system ensure the urea liquid level stability by reserving a urea liquid level signal after filtering, and calculates the real-time urea consumption and the urea display liquid level, thereby ensuring the precision of the urea liquid level in a transient state and improving the urea liquid level precision by 80%.

Description

technical field [0001] The invention belongs to the technical field of liquid level detection, and relates to a method and a system for detecting a urea liquid level, in particular to a real-time detection method and a detection system for a urea liquid level suitable for a reed switch type urea liquid level sensor. Background technique [0002] With the stricter emission regulations, most commercial vehicle diesel engines use urea injection systems to reduce nitrogen oxide emissions in exhaust. The urea level sensor is installed in the urea tank to deliver real-time urea level. At present, the reed switch type urea liquid level sensor is widely used. The filtered urea liquid level signal is stable, but the urea liquid level display is discontinuous, and the urea liquid level display accuracy is generally 5% to 10%. [0003] CN106124007A discloses a system and method for precision detection of a urea liquid level sensor. The present invention relates to a system and method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/68G01F23/72G01F23/00
CPCG01F23/68G01F23/72G01F23/80
Inventor 牛燃张贵华李冠霖贾昭远朱宏志
Owner 一汽解放青岛汽车有限公司
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