Research on Mobile Machinery NOx Emission Control Based on a Physical Model and Closed-Loop Control
Round 1
Reviewer 1 Report
This manuscript by Yue et al. on mobile source nitrogen and oxygen emission control based on a physical model and closed-loop control is well written with a fair amount of evidence. The presentation of the figures and diagrams is nice. Therefore, the manuscript is publishable after the following corrections.
1. It is hard to agree on the title of the article. The authors measured the emission of NOx and NH3 and in the title, they have mentioned as nitrogen and oxygen emission. This must be corrected.
2. The opening sentence of the abstract need to be revised. Before mentioning “To further …”, the authors need to introduce the research subject and its present status.
3. Line 14 - Introduce ‘SCR’.
4. Line 40 – Cite a suitable reference on “China IV emission regulations”.
5. Page 8- Figure 4 – NO*x*, NH*3*, *x* and *3* will be in subscript.
6. Page 11 – Figure 8 – The modeled and measured values for “downstream NH3” significantly deviates from each other. The authors should mention a few possible reasons and suggestions for improvement in the future.
7. The author did not discuss their studies from the recently published paper “Yue, ., Qiu, T. & Lei, Y. Experimental demonstration of NOx reduction and ammonia slip for diesel engine SCR system. Environ. Sci. Pollut. Res. 29, 1118–1133 (2022)”. This paper is very relevant to this present investigation. Therefore, the author should link their present study with this published report.
Author Response
Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
Author has nicely present the current work. MATLAB/Simulink has been used to proper elucidate the real-time phenomena. The manuscript can be accepted however author can check the english very carefully through out the manuscript.
Author Response
Thank you for your comments concerning our manuscript entitled “Research on mobile source nitrogen and oxygen emission control based on a physical model and closed-loop control”. Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our research. We have studied comments carefully and have made correction which we hope meet with approval.
We apologize for spelling errors such as grammar. Made in-depth revisions to the paper and asked a professional company to check for grammar and spelling mistakes.
Reviewer 3 Report
The authors present an interesting work of current interest. I suggest that a review of the English language be done.
Below, I present other suggestions to improve the quality of the submitted manuscript.
- In the abstract, lines 14 and 20, the descriptions of PID and SCR are missing.
- Page 1, line 44 - Is "HJ451-2008" a reference?
- Page 2, line 88 - It was unclear what urea injection control is being described. I suggest that the authors proofread.
- Figure 1 (page 3) could be improved. I suggest that the authors indicate the direction of the flow of gases and the identification of the communication elements (communication cables)
- Page 3, lines 108 through 110 - This sentence is unclear. I suggest the authors review it.
- Page 4, line 126 - It is unclear what the authors mean by "after offline"
- Page 4, line 137 - I suggest changing the word "formulas" to "equations". In this case, all later citations must be changed.
- Page 4, lines 149 and 150 - It is not clear what the authors wanted to say about the model temperature.
- Figure 3, page 5 - What does unit 1, unit 2 and unit 3 means?
- Line 193 - Equation 8 is not cited in the text.
- Line 213 - I suggest that the equations be explicitly quoted.
- Line 246 and 247 - Missing description of y(t) and Fac.
- Line 270 - The description of the acronym RTW is missing.
- Line 276 - What CAN mean?
- Figure 5, page 9 - There are 2 graphs in Figure 5, so I suggest authors identify each one as 5(a) and 5(b). It would be interesting if the graphs had grid lines. In the second graph it is not possible to observe the curve of the measured values.
- Figure 6 and 7 - As in figure 5, there are 2 graphs in Figure 6 and 7, so I suggest authors identify each one as 6(a); 6(b) and 7(a); 7(b).
- Figure 8 should be identified as 8(a), 8(b), 8(c) and 8(d)
- Line 358 - I suggest the authors change the statement "the errors occur when load step increases" to "the errors increase when load step increases"
Author Response
Please see the attachment.
Author Response File: Author Response.docx
