UDC: 629.083
https://doi.org/10.25198/2077-7175-2024-4-76
EDN: CIFCZJ
METHODOLOGY FOR RESTORING DIMENSIONAL CONNECTIONS WHEN ADJUSTING THE VALVE CLEARANCE IN THE GAS DISTRIBUTION MECHANISM OF AN AUTOMOBILE INTERNAL COMBUSTION ENGINE
E. A. Belozertsev1, E. A. Izhbuldin2, V. I. Kochergin3
Siberian Transport University, Novosibirsk, Russia
1e-mail: belozercevjoni911@gmail.com
2e-mail: izhbuldinea@mail.ru
2e-mail: vkplus2011@yandex.ru
Abstract. The relevance of research is due to the problems of organizing auto repair production in modern conditions associated with the difficulty of logistics and the high cost of foreign spare parts, which is confirmed by the analysis of domestic and foreign literary sources. Of particular importance in this case are the methods of optimizing the balance of costs for performing repair and restoration actions and replacing defective parts. The purpose of the work is to improve the quality of repair of rolling stock of road transport based on the use of methods for restoring dimensional connections. This study is designed to fill the existing knowledge gap caused by the lack of methods for restoring specific repair links. The use of new parts in repair, along with restored or used ones, necessitates the wider use of methods for optimizing the limit values of wear and recovery processes of dimension chain elements. The materials and methods of research are presented as an example of the development of a technique for restoring the necessary parameters of dimensional connections when adjusting the valve gap value, since the thermal gap in the timing mechanism of an internal combustion engine is an important element affecting the efficiency of the car engine. The scientific novelty of the work lies in the study of two different methods potentially suitable for implementation in the repair industry for restoring dimensional ties while reducing the valve gap by machining the outer or inner contact surfaces of car engine pushers. Studies have been carried out in relation to the decrease in the gap in operating conditions, which is widespread in automobile engines with overhead camshafts, since a decrease in the valve gap to a greater extent than an increase in it affects the efficiency of the machines. The equation of the size chain of the valve group is given, in which the valve gap is the closing link. As a result of sequentially discretely removing the surface layers of the pusher metal at 0.05 mm intervals and measuring the hardness of the surface layers, it has been found that this approach to restoring repair bonds can be recommended for use in auto repair production, with a more preferred method being to adjust the valve clearance by grinding the outer surface of the pushers. The data obtained can serve as the basis for further research in the development of a set of technologies for restoring specific size chains using repair kits that include parts with different manufacturing accuracy or that have been in operation.
Key words: car repair plant, automobile engine, gas distributing mechanism, valve clearance, pusher, size chain.
Cite as: Belozertsev, E. A., Izhbuldin, E. A., Kochergin, V. I. (2024) [Methodology for restoring dimensional connections when adjusting the valve clearance in the gas distribution mechanism of an automobile internal combustion engine]. Intellekt. Innovacii. Investicii [Intellect. Innovations. Investments]. Vol. 4, pp. 76–85. – https://doi.org/10.25198/2077-7175-2024-4-76.
References
- Averchenkov, V. I., Vasil’ev, A. S., Hejfec, M. L. (2018) [Technological heredity in the formation of the quality of manufactured parts]. Naukoemkie tekhnologii v mashinostroenii [Science-intensive technologies in mechanical engineering]. Vol. 10, pp. 27–32. (In Russ.).
- Brylev, A. V., Lizunov, I. V., Nikolus’, A. A. (2022) [Influence of technological heredity on accuracy of obtaining dimensions during machining of machine parts]. Glavnyj mekhanik [Chief mechanical engineer]. Vol. 1, pp. 58–70. – https://doi.org/10.33920/pro-2-2201-06. (In Russ.).
- Karepin, P. A. (1999) Matematicheskie osnovy teorii razmernyh cepej pri tekhnologicheskom i metrologicheskom obespechenii kachestva izdelij [Mathematical foundations of the theory of dimensional circuits in process and metrological quality assurance of products]. Moscow: Informagrotekh, 324 p.
- Katargin, V. N., Pisarev, I. S. (2008) [Repair of vehicle units by control of dimensional links accuracy]. Avtomobil’naya promyshlennost’ [Automotive industry]. Vol. 3, pp. 27–29. (In Russ.).
- Katargin, V. N., Hmel’nickij, S. V. (2015) [Justification of the choice of the type of repair of vehicle units based on the technical and economic assessment obtained on the integral dimensional model]. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of Irkutsk state technical university]. Vol. 2(97), pp. 150–156. (In Russ.).
- Mihlin,V. M., Dorogoj, V. N. (2008) [The method of determining the permissible wear of parts, ensuring an increase in their reliability]. Vestnik mashinostroeniya [Bulletin of mechanical engineering]. Vol. 7, pp. 11–14. (In Russ.).
- Kharlamov, Yu. A. et al. (2021) [Dimensional analysis of technological processes of machine parts recovery]. Izvestiya vysshih uchebnyh zavedenij. Mashinostroenie [News of higher educational institutions. Mechanical engineering]. Vol. 7(734), pp. 37–47. – https://doi.org/10.18698/0536-1044-2021-5-37-47. (In Russ.).
- Sitnikov, A. A., Sobachkin, A. V., Kamyshov, Yu. N. (2019) [Design of manufacturing and repair processes for parts with wear-resistant coatings]. Naukoemkie tekhnologii v mashinostroenii [Science-intensive technologies in mechanical engineering]. Vol. 2, pp. 29–36. – https://doi.org/10.30987/article_5c486cc46295f0.57582754. (In Russ.).
- Istomin, A. B. et al. (2021) [Ways to restore parts in repair production]. Glavnyj mekhanik [Chief mechanical engineer]. Vol. 6, pp. 59–73. – https://doi.org/10.33920/pro-2-2106-05. (In Russ.).
- Dal’skij, A. M. et al. (2000) Tekhnologicheskaya nasledstvennost’ v mashinostroitel’nom proizvodstve [Technological heredity in machine-building production]. Moscow: MAI, 360 p. (In Russ.).
- Terskikh, V. M. et al. (2017) [Formalization of spare parts requirements for the operation of motor vehicles]. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of Irkutsk state technical university]. Vol. 21, Issue 3(122), pp. 174–183. – https://doi.org/10.21285/1814-3520-2017-3-174-183. (In Russ.).
- Katargin, V. N., Terskikh, V. M. (2012) Improving the efficiency of Maintenance and Repair on Enterprises Official Dealers using the automated System inventory Management Czasopismo Techniczne, Politechniki Krakowskiej, Vol. 4, Issue 9, pp. 181–185. (In Eng.).
- Katargin, V., Pisarev, I., Khmelnitskiy, S. (2013) Supporting Model of Decision-Making on Advisability to Carry on the Repair-and-Renewal Operations. International Conference on Transport Means, Kaunas Univ Technol, pp. 304–307. (In Eng.).
- Kochergin, V., et al. (2021) Optimization of technical monitoring processes. TransSiberia 2020 Conference. Transportation Research Procedia, 54, pp. 166–172. – https://doi.org/10.1016/j.trpro.2021.02.061. (In Eng.).
- Lealin, S. (2024) Comparison and Evaluation of classical Methods of dimensional Chains Theory and their modern Analogues. Journal of Engineering Science, 30(4), pp. 20–30. – https://doi.org/10.52326/jes.utm.2023.30(4).02. (In Eng.).
- Schleich, B., Wartzack, S. (2014) A discrete geometry Approach for tolerance Analysis of Mechanism (2014), Mechanism and Machine Theory, 77, pp. 148–163. – https://doi.org/10.1016/j.mechmachtheory.2014.02.013. (In Eng.).