Research on Mobile Machinery NOx Emission Control Based on a Physical Model and Closed-Loop Control Article Swipe
Guangzhao Yue
,
Hanming Wu
,
Tiezhu Zhang
,
Ruijun Liu
,
Jianxin Sun
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3390/pr10071374
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3390/pr10071374
Mobile machinery means a power-driven vehicle that is specifically designed and constructed to perform work on or off the road. To reduce the nitrogen oxide (NOx) emissions that come from mobile machinery, a combination of a physical model and closed-loop control is applied to the selective catalytic reduction (SCR) system. Based on the design of the variable cross-section extended exhaust structure, the differential pressure measurement was achieved, and the physical model of the exhaust flow based on the differential pressure was established. Based on the analysis of the heat and mass transfer process of the SCR catalyst, a prediction model for the internal temperature field of the catalyst was established by combining the upstream and downstream exhaust temperature sensors. Using the SCR downstream nitrogen oxides signal and the proportional–integral–derivative (PID) closed-loop control algorithm, segmented PID closed-loop control under the large hysteresis response of the SCR system was realized. The above algorithms were used to form the control code through MATLAB/Simulink and downloaded to the embedded microprocessor. The test results show that the established model can realize the real-time calculation of the exhaust gas flow rate and the internal temperature of the catalyst. Under steady-state conditions, the calculation error of the exhaust flow rate is less than ±3%, and the calculation error of the catalyst temperature is less than ±5%. Under transient conditions, the calculation error of the exhaust flow rate is less than ±9%, and the calculation error of the catalyst temperature is less than ±8%. The nitrogen–oxygen signal-based PID closed-loop algorithm can improve the nitrogen–oxygen conversion efficiency and control accuracy of the model.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/pr10071374
- https://www.mdpi.com/2227-9717/10/7/1374/pdf?version=1657801303
- OA Status
- gold
- Cited By
- 3
- References
- 17
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4285596965
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W4285596965Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.3390/pr10071374Digital Object Identifier
- Title
-
Research on Mobile Machinery NOx Emission Control Based on a Physical Model and Closed-Loop ControlWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2022Year of publication
- Publication date
-
2022-07-14Full publication date if available
- Authors
-
Guangzhao Yue, Hanming Wu, Tiezhu Zhang, Ruijun Liu, Jianxin SunList of authors in order
- Landing page
-
https://doi.org/10.3390/pr10071374Publisher landing page
- PDF URL
-
https://www.mdpi.com/2227-9717/10/7/1374/pdf?version=1657801303Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
-
https://www.mdpi.com/2227-9717/10/7/1374/pdf?version=1657801303Direct OA link when available
- Concepts
-
Exhaust gas, PID controller, Control theory (sociology), Volumetric flow rate, NOx, Engineering, Temperature control, Automotive engineering, Control engineering, Computer science, Chemistry, Mechanics, Physics, Waste management, Control (management), Artificial intelligence, Organic chemistry, CombustionTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
3Total citation count in OpenAlex
- Citations by year (recent)
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2024: 3Per-year citation counts (last 5 years)
- References (count)
-
17Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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