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
CN110595579AActive Publication Date: 2019-12-20一汽解放青岛汽车有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
一汽解放青岛汽车有限公司
Publication Date
2019-12-20

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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%.
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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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