UDC: 629.018
https://doi.org/10.25198/2077-7175-2023-6-79
EDN: BJAKHC


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METHOD FOR STUDYING THE FORM CHANGING OF CONNECTING ROD BEARINGS OF THE CRANKSHAFT OF A CAR ENGINE IN OPERATION (USING THE EXAMPLE OF KAMAZ-740)

O. A. Kulakov
Non-commercial partnership «KAMAZ-Avtosport», Naberezhnye Chelny, Russia
e-mail: kulakov.o@mail.ru

A. A. Gafiyatullin
Engine Plant, Public Joint Stock Company KAMAZ, Naberezhnye Chelny, Russia
e-mail: gafiatullin@kamaz.ru

R. F. Kalimullin
Naberezhnye Chelny Institute (branch) of the Federal State Autonomous Educational Institution of Higher Education «Kazan (Volga region) Federal University», Naberezhnye Chelny, Russia
e-mail: rkalimullin@mail.ru

Abstract. The relevance of the topic of the article is due to the unresolved problem of failures of automobile engines, in particular, modern mass-produced engines of the KAMAZ-740.10, 7403 families, due to cranking of the connecting rod bearings, and the need for deeper studies of the processes and phenomena that lead to them, and the development of solutions that exclude them in operation.

The purpose of the study is to ensure the reliability of automobile engines by reducing the risk of crankshaft connecting rod bearings turning in operation by developing a method for studying their shape change and applying it when substantiating and implementing various design, technological and operational solutions.

A prototype is described and a developed method and device for determining the clearance in a connecting rod bearing, suitable for studying the formation of connecting rod bearings under engine test bench conditions. The prototype was a differential-type pneumatic device used in active control devices for honing cylinder liners. With the use of the described device, a method for studying the formation of connecting rod bearings under the conditions of bench tests of KAMAZ-740.10 diesel engines was developed and tested.

The use of new methods, devices and techniques makes it possible to investigate the patterns of shape changes of connecting rod bearings in relation to lubrication conditions, temperature and load conditions of the engine, and other factors.

The presented experimental results show that the gap in the connecting rod bearing is not stable, is caused not only by wear, but also by the resulting deflection of the liner, and significantly depends on the temperature regime of the engine - with an increase in oil temperature, the gap decreases due to an increase in deflection. The authors explain the formation of deflection and shape change of the liners by the loss of its stability from the action of loads and internal stresses under conditions of instability of the oil supply.

The results of experimental studies presented in the article have a scientific novelty, since a previously undescribed and not fixed decrease in the gap due to the deflection of the liners, which is formed immediately from the start of operation after the engine is assembled, is established, and its value is variable and determined by the temperature regime.

Practical significance – the developed method makes it possible to study the formation patterns of crankshaft connecting rod bearings to test the effectiveness of design, technological and operational solutions to prevent their turning during the operation of an automobile engine.

The main directions of promising research is the substantiation of practical solutions to ensure the stability of the shape of the liners during long-term operation of the engine.

Key words: crankshaft, connecting rod bearing, liners, shaping, clearance, deflection, turning, lubrication conditions.

Cite as: Kulakov, O. A., Gafiyatullin, A. A., Kalimullin, R. F. (2023) [Method for studying the form changing of connecting rod bearings of the crankshaft of a car engine in operation (using the example of KAMAZ-740)]. Intellekt. In novacii. Investicii [Intellect. Innovations. Investments]. Vol. 6, pp. 79–91. – https://doi.org/10.25198/2077-7175-2023-6-79.


References

  1. Volosov, S. S. et al. (1984) Aktivnyy kontrol’ razmerov [Active Dimension Control]. Moscow: Mechanical engineering, 223 р.
  2. Antropov, B. S., Yanovsky, M. A., Nesterov, D. A. (2007) [Improving the performance of crankshaft bearings]. Traktory i sel’skokhozyaystvennyye mashiny [Tractors and agricultural machines]. Vol. 12, pp. 35–36. (In Russ.).
  3. Bykov, V. G., Saltykov, M. A., Gorbunov, M. N. (1985) [A new way to ensure the stability of the geometric parameters of liners for heavily loaded diesel bearings]. Dvigatelestroyeniye [Engine building]. Vol. 8, pp. 32–35, 48. (In Russ.).
  4. Denisov, A. S., Kulakov, A. T. (2007) Obespecheniye nadezhnosti avtotraktornykh dvigateley [Ensuring the reliability of automotive engines]. Saratov: Saratov State Technical University, 422 р.
  5. Kulakov, A. T. et al. (2019) [Diagnostics of the technical condition of the crankshaft bearings during the operation of the vehicle]. Problemy ekonomichnosti i ekspluatatsii avtotraktornoy tekhniki: sbornik materialov Mezhdunarodnogo nauchno-tekhnicheskogo seminara imeni V.V. Mikhaylova, Saratov, 15–16 maya 2019 g. [Problems of efficiency and operation of automotive and tractor equipment: a collection of materials of the International Scientific and Technical Seminar named after V. V. Mikhailova, Saratov, May 15–16, 2019] Saratov: Amirit LLC, рр. 189–196. (In Russ.).
  6. Korolev, A. E., Frolov, V. K. (2003) [Internal stresses in the bimetallic liners of the crankshaft of diesel engines D49]. Mekhanika i fizika frikcionnogo kontakta [Mechanics and physics of frictional contact]. Vol. 10, pp. 61–71. (In Russ.).
  7. Kulakov, A. T., Denisov, A. S. (2006) [Instability of clearances in connecting rod bearings due to the formation of deflection of the liners]. Vestnik Saratovskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of the Saratov State Technical University]. Vol. 3. No 1(14), pp. 83–91. (In Russ.).
  8. Kulakov, A. T., Sakhapov, I. A. (2010) [Methodology and results of the computational and experimental study of the deformation of the liners]. Mir transporta i tekhnologicheskikh mashin [The world of transport and technological machines]. Vol. 1(28), pp. 27–32. (In Russ.).
  9. Kulakov, O. A., Sakhapov, I. A., Kulakov, A. T. (2008) [Diagnosis of Form Changes in Connecting Rod Bearings of Diesel Engines]. Avtotransportnoye predpriyatiye [Motor transport company]. Vol. 1, pp. 47–49. (In Russ.).
  10. Barun, V. N. et al. (1983) [Causes and elimination of cases of scuffing and turning of the bearing shells of the crankshaft of the KamAZ automobile diesel engine]. Dvigatelestroyeniye [Engine building]. Vol. 4, pp. 3–5. (In Russ.).
  11. Method for in-place diagnostics of internal combustion engine bearings and filter elements: Pat. 2398200 Ros. Federation. No. 2009123745/06; dec. 06/22/2009; publ. 27.08.2010, Bull. No. 24. (In Russ.).
  12. Method for measuring gaps in the bearing units of the connecting rod of an internal combustion engine: Pat. 2295703 Ros. Federation. No. 2005116816/28; dec. 06/01/2005; publ. 03/20/2007, Bull. No. 8. (In Russ.).
  13. Method for determining the gap in the connecting rod bearing of the crankshaft during testing and diagnostics of the internal combustion engine of automobiles, transport and transport-technological machines: Pat. 2691259 Ros. Federation. No. 2018105459; dec. 02/13/2018; publ. 06/11/2019, Bull. No. 17. (In Russ.).
  14. Das San., Das Shub. (2019) Applications of Tribology on Engine Performance. Automotive Tribology. pp. 307– 325. http://dx.doi.org/10.1007/978-981-15-0434-1_16 (In Eng.).
  15. Dong Q., Yin Zn., Li H. (2019) Simulation and Experimental Verification of Fatigue Strength Evaluation of Journal Bearing Bush. Engineering Failure Analysis. No 109(1), рр. 104275. http://dx.doi.org/10.1016/j.engfailanal.2019.104275 (In Eng.).
  16. Ghiasvand, A., Abdollahi, S. A. (2023) Designing a Connecting Rod for an Internal Combustion Engine. Conference: 7thInternational Conference on Applied Researches In Science And Engineering At: Aachen, Germany (In Eng.).
  17. Kulakov A. T., Barylnikova E. P., Kulakov O. A. (2019) Machine elements evaluation diagnostic devices development using compressed air on crankshaft bearings example. IOP Conference Series: Materials Science and Engineering. Vol. 570, Is.1, pp. 012064. https://doi.org/10.1088/1757-899X/570/1/012064 (In Eng.).
  18. Someya, T., Okamoto, Y. (2003) On the Standardization of Damages in Plain Bearings. Journal Japanese Society of Tribologists. No 48(10), рр. 776–781. (In Eng.).
  19. Sun, J. et al. (2019) Lubrication Performance of Connecting-Rod and Main Bearing in Different Engine Operating Conditions. Chinese Journal of Mechanical Engineering. No 32(1). http://dx.doi.org/10.1186/s10033-019-0335-9 (In Eng.).
  20. Vencl, A., Rac, A. (2014) Diesel engine crankshaft journal bearings failures: Case study. Engineering Failure Analysis. Vol. 44, рр. 217–228. http://dx.doi.org/10.1016/j.engfailanal.2014.05.014 (In Eng.).