Experimental Study of the Correlation between the Wear and the Braking System Efficiency of a Vehicle
Round 1
Reviewer 1 Report
The authors have studied the braking system efficiency of an auto-vehicle,
How is the study validated
what is the novelty of this study? This can be clearly explained in the introduction
Cite recent articles
Table 2, typos, plz cross verify for typos throughout the manuscript
Brake pads can get damaged for various reason like the terrain and braking patterns, how did the author select the conditions for the test
conclusions can be more crisp
Author Response
Response Letter
for Reviewer 1, Round 1
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency of a vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is very colorful. What was deleted is marked in red and cut, and what was
added is marked in green.
Thanks to Reviewer 1 for the appreciation, observations, and specific comments!
By the changes and additions realized I hope to be in the same consensus as the reviewer's wish!
Thus:
- Reviewer 1 says: How is the study validated?
Response 1: Thank you for the question and I can tell you that this study is validated by measuring the distance and stopping time in relation to the initial speed and the mass of the vehicle and it should also be by measuring the average deceleration fully developed during the test (subject that remains for another paper) . For this, both the Abstract and the Introduction have completed the validation method and the degree of novelty, with new sentences, marked in green (see the manuscript).
- Reviewer 1 says: what is the novelty of this study?
Response 2: As you will notice, the degree of novelty of this study was also specified in the Introduction section (see the manuscript).
- Reviewer 1 says: Cite recent articles
Response 3: Thank you for reporting, but note that most of the cited articles are as recent as possible. However, I have introduced new articles, marked in green, which replace those published a long time ago and marked with red and cut out (see the manuscript).
- Reviewer 1 says: Table 2, typos, plz cross verify for typos throughout the manuscript
Response 4: Thank you for notifying, I have checked and corrected the typos in such a way that they correspond in the text and in Table 2. (see the manuscript).
- Reviewer 1 says: Brake pads can get damaged for various reason like the terrain and braking patterns, how did the author select the conditions for the test
Response 5: This statement is true and as a result I have inserted a paragraph in section 3 (marked in green) to see how the conditions for testing were selected (see the manuscript).
- Reviewer 1 says: conclusions can be more crisp
Response 6: Thanks for the suggestion and I tried to improve the conclusions to be clearer (see the manuscript).
Note: With sincere apologies for these lapses and in the hope that now everything is in order,
thank you once again for suggestions, observations and comments presented!
Thanks for your understanding!
Date: June 29, 2023 Authors
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The article is quite clearly written. An interesting topic suitable for thinking about for practice.
The quality of the pictures is low. It is not possible to see the wear of the plates from the pictures. I also recommend editing the images to make the text readable.
Author Response
Response Letter
for Reviewer 2, Round 1
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency of an auto-vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is very colorful. What was deleted is marked in red and cut, and what was
added is marked in green.
Thanks to Reviewer 2 for the appreciation, observations, and specific comments!
By the changes and additions realized I hope to be in the same consensus as the reviewer's wish!
Thus:
- Reviewer 2 says: The quality of the pictures is low. It is not possible to see the wear of the plates from the pictures. I also recommend editing the images to make the text. readable.
Response 1: Thank you for the observation and the quality of the images has been improved, respectively the wear of the boards is much more visible, and the text of the images is now more visible, and to be even more readable, there are two possibilities, enlarging the images or re-photographing, but I don't know exactly which one images refer to you! However, I did my best to make all pictures as visible as possible! (see the manuscript).
Note: With sincere apologies for these lapses and in the hope that now everything is in order,
thank you once again for suggestions, observations and comments presented!
Thanks for your understanding!
Date: June 29, 2023 Authors
Author Response File: Author Response.pdf
Reviewer 3 Report
One relevant problem is that tests have been done only on one vehicle.
The testing conditions and the standard adopted to make the tests are not described in detail and therefore relevance and significance of the measurements are not clear.
The monitored quantities are not defined clearly.
A number of inaccuracy can be noted in the values reported in the tables.
I attach a file of the submitted text with my notes. I hope this will help authors to understand why I am recommending the rejection of this manuscript.
Comments for author File: Comments.pdf
The English language is very poor and asks for a deep revision with the help of a mother toungue expert.
Author Response
Response Letter
for Reviewer 3, Round 1
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency of a vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is very colorful. What was deleted is marked in red and cut, and what was
added is marked in green.
Thanks to Reviewer 3 for the reasons that led to the rejection of the manuscript!
At the same time, thank you for file of the submitted text with your notes, which I considered and modified the text of the manuscript, accordingly, contributing a lot in this way to the improvement of the manuscript (see the manuscript).
In addition, it is true that only one vehicle was tested, but the co-author is my PhD student and that's how much he managed to experiment, and we concluded that what he achieved should be published. Also, when we have more results on other vehicles, I will consider all your questions, in detail.
By the changes and additions realized I hope to be in the same consensus with your wish!
Notes: With sincere apologies for these lapses and in the hope that now is in order, thank you once again for the attached file, which was very helpful.
I admit that there were also your observations that would have required extensive additions, but I summarized myself as briefly as possible because I do not fall within the deadline for sending the review, imposed by the editors. At the same time, I revised the English language with a recommended editor!
Regarding reference [23], there is also an online book.
Thanks for your understanding!
Date: July 29, 2023 Authors
Author Response File: Author Response.pdf
Reviewer 4 Report
The topic of the paper sounds interesting however it is not developed as required. The type of experiment carried out is not rigorous, or if it is, is not rigorously presented. Experimental procedure should clearly explain which kind of test is carried out and what is the result of these tetsts. This is not clear. The braking efficiency concept should be clearly explained and correlated to the type of experiments carried out in the investigation and, in turn, to the results obtained. A clear correleation between input parameters-type of test-results is missing. Moreover wear mechanisms cannot be completely described using pictures like Figure 4-5-6. A deeper investigation through microscopy is necessary to fully explain the wear behavior of a braking system (pad+disc).
English language require an extensive editing. Many sentences should be re-written changing the order of words. For example in line 16 "Thus, a series of successive tests were performed on a vehicle... and not "Thus, on a vehicle were performed a series of successive tetsts...".
Some words should be changed with others, since they are not so appropriate, like for example "auto-vehicle" with simply "vehicle" or "car" or "motor vehicle". In different points "for this" is used instead of "therefore" or "for this purpose".
Author Response
Response Letter
for Reviewer 4, Round 1
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency of a vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is very colorful. What was deleted is marked in red and cut, and what was
added is marked in green.
Thank you, Reviewer 4, because the subject sounds interesting!
By the changes and additions realized I hope to be in the same consensus as the reviewer's wish, cu toate ca you would not like to sign my review report!
Thus:
- Reviewer 4 says: The topic of the paper sounds interesting however it is not developed as required. The type of experiment carried out is not rigorous, or if it is, is not rigorously presented. Experimental procedure should clearly explain which kind of test is carried out and what is the result of these tetsts. This is not clear. The braking efficiency concept should be clearly explained and correlated to the type of experiments carried out in the investigation and, in turn, to the results obtained. A clear correleation between input parameters-type of test-results is missing. Moreover wear mechanisms cannot be completely described using pictures like Figure 4-5-6. A deeper investigation through microscopy is necessary to fully explain the wear behavior of a braking system (pad+disc).
Response 1: Through the additions and changes made to the manuscript, I believe that the subject was developed appropriately, respectively the experimental procedure shown in section 2 "Materials and Method", where it was completed with the paragraph ‘Therefore, the experimental procedure/methodology has in mind the study of the behavior of the braking system of a vehicle in intense and moderate traffic conditions to increase traffic safety by establishing its efficiency.
The establishing of the efficiency of the braking system of the vehicle chosen for testing was based on a series of successive experimental tests, through which the degree of wear of the brake pads and discs was monitored, with the aim of observing the efficiency evolution of the braking system. The experimental tests were carried out both in the laboratory (on the stand with the help of the dynamometer) and in traffic (urban and extra-urban), according to road safety regulations, depending on some parameters considered essential. On the other hand, the determination of the efficiency of the braking system was achieved by measuring the distance and time of stopping/braking in relation to the initial speed, the mass of the vehicle, the number of kilometers traveled. At the same time, the experimental tests carried out in series and successively showed the need for more frequent replacement of some elements of the braking system.’ and continued in section 3 " Experimental results and discussions " and the results are shown in the tables and the graphic representations also in section 3 " Experimental results and discussions " are now much clearer! (see the manuscript)
The same can be said for the concept of braking efficiency; it is clearly explained (partially in section 1 "Introduction") and correlated with the experiments performed and the results obtained in section 3 "Experimental results and Discussions" and presented where it was considered appropriate (see the manuscript).
Referring to determining the efficiency of braking, the input parameters are the mass (obtained by weighing on the dynamometer stand from 1,462, to 1566 kg) and the speed of the vehicle (of 5 km/h on the stand, and in traffic it was varied from 20 to 50 km/ h) and kilometers traveled being from 115,377 to 139,334 km and the output parameters are the distance and the stopping/braking time, as well as the wear of the brake discs, and pads and the results are tabled, even represented graphically (see the manuscript).
Finally, to clarify even more and more clearly, the correlation between the efficiency parameters, the experiments performed, and the results obtained was completed at the end of section 3 "Experimental Results and Discussions" the paragraph ‘Therefore, from the analysis of the results of experimental tests carried out on a vehicle both with used discs and pads, as well as with new discs and pads, it was found that the braking system efficiency increases by 13% (from 59 to 72 %), when the vehicle has been equipped with new brake discs and pads.
Additionally, the braking system efficiency, in both cases (with used and new discs and pads) was well above the minimum allowed limit of 43.5%. At the same time, it was observed that the measured parameters (distance and time of stopping/braking) for determining the braking efficiency increased with increasing vehicle speed (from 20 to 50 km/h), being lower in the case of the braking system with new discs and pads. Also, in order to establish the braking system efficiency, the wear of the brake discs and pads was also monitored, in relation to the initial speed, the mass of the vehicle, the number of kilometers traveled to demonstrate the need for more frequent replacement of some elements of the braking system, especially in conditions heavy traffic.’ (see the manuscript).
At the same time, you will notice that there are also Notes and additions added to the text of the manuscript, in order to clarify other observations from other Reviewers, respectively to improve the English language (see the manuscript).
Regarding the wear mechanism (disc + pad), for a complete description with a microscopic investigation, it is complex and requires an extensive description and our intention is to make it the subject of another paper. That is why it was briefly explained in this paper and highlighted by figures 4, 5, and 6 (see the manuscript).
- Reviewer 4 says: English language require an extensive editing. Many sentences should be re-written changing the order of words. For example in line 16 "Thus, a series of successive tests were performed on a vehicle... and not "Thus, on a vehicle were performed a series of successive tetsts...".
Some words should be changed with others, since they are not so appropriate, like for example "auto-vehicle" with simply "vehicle" or "car" or "motor vehicle". In different points "for this" is used instead of "therefore" or "for this purpose".
Response 2: I revised the English language with a recommended editor, and I took into account what you reported (see the manuscript).
Note: With sincere apologies for these lapses and in the hope that now everything is in order, thank you once again for the suggestions, observations and comments presented and maybe you will change your mind and want to sign the evaluation report!
Thanks for your understanding!
Date: June 29, 2023 Authors
Author Response File: Author Response.pdf
Round 2
Reviewer 3 Report
The main author has done very quickly an extensive revision of the manuscript, taking into proper account all the notes and comments I did to the original version.
The manuscript is really improved and I think can be accepted for publication in the Journal, even if there are still some limitation mainly related to the available data base of the experimental results.
The quality of the English language, although improved with respect to the original verion of the manuscript, needs still of further revision.
Author Response
Response Letter
for Reviewer 3, Round 2
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency of a vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is more colorful. What was deleted is marked in red and cut, and what was added is now marked in blue.
Many thanks to Reviewer 3 for having the patience to reread the revised manuscript, to see the improvements made taking into proper account all the notes and comments you did them at the original version, right for which you have accepted to be published.
Regarding the limitations related to the available database of the experimental results, I inform you that many other additions with additional results have been made and at the same time I have made a new revision of the English language (see the manuscript).
By the changes and additions realized I hope to be in the same consensus with your wish and I have fully convinced you that have accepted the publication of this manuscript!
Thanks for your understanding!
Date: July 07, 2023 Authors
Author Response File: Author Response.pdf
Reviewer 4 Report
Dear authors,
I added my comments on the attached pdf.
Please consider really necessary the explanation of braking efficiency, possibly using formula (s).
Comments for author File: Comments.pdf
Please read again very carefully the manuscript. English needs another check.
Author Response
Response Letter
for Reviewer 4, Round 2
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency of a vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is more colorful. What was deleted is marked in red and cut, and what was added is now marked in blue.
Thanks Reviewer 4, for the observation "Please consider really necessary the explanation of braking efficiency, possibly using formula (s).", which I approached with great attention and additional studies, which led to many explanations, corrections and additions of paragraphs and sentences, to explain the 'efficiency of friction', defining it and using formulas, which were applied at calculate the braking efficiency at the Notes after the Tables 3, 4 and 5 (see the manuscript).
I have taken into account all the observations, suggestions and the explanations regarding 'braking efficiency' offered in the attached pdf, to which I have responded punctually and on which you find re-attached (see pdf attached and follow in the manuscript).
Regarding the English language, I carefully rechecked the manuscript, correcting everything you pointed out to me, but I also discovered other mistakes, which I corrected and all marked in blue. I hope it will be ok, now! (see the manuscript).
By the changes, additions and explanations realized I hope to be in the same consensus with your wish!
With sincere apologies for this lapse and in the hope that now everything is in order, thank you once again for the suggestions, observations and comments presented!
Thanks for your understanding!
Date: July 07, 2023 Authors
Response Letter
for Reviewer 4, Round 2
Manuscript ID: applsci-2455181
Entitled:
“Experimental study of the correlation between the wear and the braking system efficiency
of a vehicle",
by
Filip Ilie, Andreea-Catalina Cristescu
Note: The manuscript is more colorful. What was deleted is marked in red and cut, and what was
added is now marked in blue.
Thanks Reviewer 4, for the observation "Please consider really necessary the explanation of
braking efficiency, possibly using formula (s).", which I approached with great attention and
additional studies, which led to many explanations, corrections and additions of paragraphs and
sentences, to explain the 'efficiency of friction', defining it and using formulas, which were
applied at calculate the braking efficiency at the Notes after the Tables 3, 4 and 5 (see the
manuscript).
I have taken into account all the observations, suggestions and the explanations regarding
'braking efficiency' offered in the attached pdf, to which I have responded punctually and on
which you find re-attached (see pdf attached and follow in the manuscript).
Regarding the English language, I carefully rechecked the manuscript, correcting everything you
pointed out to me, but I also discovered other mistakes, which I corrected and all marked in blue.
I hope it will be ok, now! (see the manuscript).
By the changes, additions and explanations realized I hope to be in the same consensus with your
wish!
With sincere apologies for this lapse and in the hope that now everything is in order, thank you
once again for the suggestions, observations and comments presented!
Thanks for your understanding!
Date: July 07, 2023 Authors
Author Response File: Author Response.pdf
