A method, device and vehicle for nozzle fault detection
By monitoring the efficiency of the catalytic reduction system and adjusting the urea injection volume, urea nozzle blockage and wear were identified, solving the problem of reduced SCR system efficiency and achieving environmental protection and system optimization.
CN117685086BActive Publication Date: 2026-07-03ANHUI HUALING AUTOMOBILE
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI HUALING AUTOMOBILE
- Filing Date
- 2024-01-09
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
Existing technologies cannot effectively identify urea nozzle blockage and wear, leading to reduced efficiency of SCR technology and environmental pollution.
Method used
By monitoring the efficiency of the catalytic reduction system, adjusting the urea injection rate, and analyzing the efficiency change trend, the type of nozzle failure, including nozzle blockage and wear, can be determined.
Benefits of technology
It enables accurate identification of nozzle malfunctions, improves the efficiency of the SCR system, reduces nitrogen oxide emissions, and protects the environment.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117685086B_ABST
Abstract
This invention discloses a method, apparatus, and vehicle for nozzle fault detection, relating to the field of exhaust gas treatment. The method includes: determining the catalytic reduction efficiency of the catalytic reduction system in the current cycle; if the catalytic reduction efficiency is lower than a preset reduction efficiency, increasing and decreasing the urea injection quantity respectively to obtain the trend of catalytic reduction efficiency changes; determining the type of fault based on the trend and the catalytic reduction efficiency corresponding to the fault, where faults include nozzle blockage and nozzle wear, with different catalytic reduction efficiencies corresponding to nozzle blockage and nozzle wear. Since the relationship between catalytic reduction efficiency and urea injection quantity differs after a nozzle fault occurs, this application, when determining that the catalytic reduction efficiency in the current cycle has not reached the preset reduction efficiency, increases and decreases the urea injection quantity respectively to determine the type of fault corresponding to the current nozzle, facilitating subsequent maintenance.
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