A detection device and detection method for preventing bubbles and ice water from affecting the urea quality detection of automobile urea tank

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By setting up a suction pump and filter cage in the urea quality sensor to remove bubbles and ice cubes, and using ultrasonic to measure the urea concentration, the problems of urea box vibration and detection interference in cold environments are solved, and detection accuracy and system reliability are improved.

CN111965252BActive Publication Date: 2025-04-04JAINGXI ISUZU AUTOMOBILE CO LTD

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Patent Information

Application Number: CN202010849179.3
Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner
Filing Date: 2020-08-21
Publication Date: 2025-04-04
Estimated Expiration: 2040-08-21

Application Information

Patent Timeline

21 Aug 2020

Application

CN202010849179.3

04 Apr 2025

Publication

CN111965252B

IPC: G01N29/02; G01N29/14; G01N29/34

CPC: G01N29/02; G01N29/14; G01N29/34; G01N2291/0222

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Application Domain

Analysing fluids using sonic/ultrasonic/infrasonic waves Material analysis using acoustic emission techniques

Technology Topics

Ice water Environmental engineering

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AI Technical Summary

Technical Problem

In vibrating and cold environments, the car urea box is prone to produce bubbles and ice-water mixtures, interfering with the detection of urea quality sensors and causing SCR system failure.

Method used

By vacuuming the inside of the urea quality sensor body, bubbles and ice are removed by using a suction pump and filter cage, ensuring that there are no bubbles in the urea aqueous solution, and then using an ultrasonic measuring device to measure the urea concentration.

Benefits of technology

It effectively avoids interference with the urea concentration detection by bubbles and ice water mixture, improves the detection accuracy of the urea quality sensor, and prevents SCR system failure.

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Abstract

The present invention discloses a detection device and a detection method for preventing bubbles and ice and water from affecting the urea quality detection of an automobile urea tank, and relates to the technical field of automobile exhaust treatment, including a urea quality sensor body, a suction pump, and a filter box, wherein the liquid suction port of the urea quality sensor body is connected to the inside of the urea tank through a liquid suction pipe; the filter box is used to filter ice cubes and ice slag in the urea aqueous solution; the suction port of the suction pump is connected to the suction port of the urea quality sensor through an air suction pipe, and a measuring device for measuring urea concentration is arranged inside the urea quality sensor body. The inside of the urea quality sensor body is evacuated to vacuum, so that the urea aqueous solution in the urea tank is filtered out of ice cubes and ice slag through the filter box and then sucked into the urea quality sensor body, and all bubbles in the urea quality sensor body are sucked out by the suction pump, so that there are no bubbles in the urea aqueous solution inside the urea quality sensor body, thereby avoiding interference with the urea concentration detection.

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