Evaluation of reliability indicators of shock absorbers struts of M1 category cars in conditions of violation of established market relations between end users of spare parts and suppliers

Introduction. Over the past two years, there has been a violation of established market relations between end users of spare parts and suppliers. This led, on the one hand, to a significant increase in the cost of automotive components, and, on the other, to a reorientation of the market to new alternative manufacturers and suppliers. The main purpose of the work was a statistical assessment of the reliability indicators of the most expensive suspension element – the McPherson suspension strut, in the conditions of replacing the original struts with analogues available on the market.

Methods. The study of the operational reliability of systems, components and assemblies of M1 cars was conducted in a dealership during 2022-2023. The study mainly involved cars with a sedan body and a McPherson front suspension. At the same time, the reason for contacting the service, the mileage of the car, as well as the types of work performed were recorded in each work order. The experimental data were processed using MSExcel and MatLab software from MathWorks.

Resultsand conclusions. The conducted research allowed us to conclude that the appeals on the suspension of the car are almost twice as high as other appeals. The most expensive elements – the front shock struts, account for up to a third of all suspension failures. To assess the reliability indicators of alternative racks, the failure distribution law (normal), the probability of failure and uptime are determined, and the parameters of the distribution law are determined: mathematical expectation, standard deviation and coefficient of variation. It was found that the resource of the rear shock absorbers is at least 30% more, and there are significantly fewer calls at the service station. Thus, the operation of a car with racks from alternative manufacturers is quite reasonable, despite the fact that the resource of racks from alternative manufacturers is usually lower than that of the original brands.

1. Kamarul Ariffin Zakaria, Mohamad Iqma lFaris Idris, Sivakumar Dharmalingam, Suhaila Salleh, Nortazi Sanusi and Mohd Ahadlin Mohd Daud Fatigue strain signal characteristic and damage of automobile suspension system ARPN. Journal of Engineering and Applied Sciences. 2018; VOL. 13, NO. 1, JANUARY.

2. Tihov-Tinnikov D.A. Methods for monitoring the technical condition of the suspension of vehicle under operating conditions. International Journal of Advanced Studies. 2021; T. 11. no 4: 18-30. (in Russ.)

3. Lysenko A.V. et al. Method of Road holding Control of the Vehicle of Category M 1 under Operating Conditions. IOP Conference Series: Materials Science and Engineering. 2019; Vol. 632: 012046. https:// doi.org/10.1088/1757-899x/632/1/012046

4. Chernyshov K.V., Novikov V.V., Sanzhapov R.R., Kotov V.V. Analysis of shock absorber resistance impact on load safety, continuous wheel rolling and energy loss in vehicle suspension. The Russian Automobile and Highway Industry Journal. 2022;19(2):258-277. (In Russ.) https://doi.org/10.26518/2071-7296-2022-19-2-258-277

5. Lozia, Z, and Zdanowicz, P. Simulation Assessment of the Impact of Inertia of the Vibration Plate of a Diagnostic Suspension Tester on Results of the EUSAMA Test of Shock Absorbers Mounted in a Vehicle. IOP Conference Series: Materials Science and Engineering. 2018; vol. 421: 022018, doi:10.1088/1757-899x/421/2/022018

6. Popovic V., Vasic B., Petrovic M., and Mitic S. System approach to vehicle suspension system control in CAE environment, Stroj. Vestnik Journal Mech. Eng. 2011; vol. 57, no. 2: 100–109.

7. Pozdeev A.V., Pohlebin A.V., Chernyshov K.V., Muhidinov Yu.M., Muhuchev Sh.M. Troubleshooting of hydraulic shock absorbers during bench tests. Izvestiya volgogradskogo GTU. seriya: nazemnye transportnye sistemy. 2015; 6 (166): 71-76. (in Russ.)

8. Parfen’eva I. E. Assessment of the technical level of hydraulic shock absorbers cars. Tekhnicheskie nauki – ot teorii k praktike. 2013; no 21: 37-45. (in Russ.)

9. Balaji P. A., Venkatesh S. N., Sugumaran V. S., Fault Diagnosis of Suspension System Based on Spectrogram Image and Vision Transformer. Eksploatacjai Niezawodnosc – Maintenance and Reliability. 2024: 26(1). http://doi.org/10.17531/ein/174860

10. Ostrenko A.G., Ogryzkov S.V. Monitoring the technical condition shock car in the movement. Visnik SevNTU. 2014;152: 82-84. (in Russ.)

11. Ryabov I.M., Novikov V.V., Pozdneev A.V. Efficiency of Shock Absorber in Vehicle Suspension. Procedia Engineering. 2nd International Conference on Industrial Engineering (ICIE-2016). ed. by A.A. Radionov. [Elsevier publishing]. 2016; Vol. 150: 354- 362.

12. Abd Rahim, A.A., Abdullah, S., Singh Karam Singh, S. and Nuawi, M.Z. Reliability assessment on automobile suspension system using wavelet analysis. International Journal of Structural Integrity. 2019; Vol. 10 No. 5: 602-611. https://doi.org/10.1108/IJSI-04-2019-0035

13. Bazhenov Yu.V., Bazhenov M.Yu., Kalenov V.P. Investigation of operational reliability of vehicle front suspension. Transport: science, equipment, management. 2021; 11: 27-32. (in Russ.)

14. Denisov I.V., Denisov I.V. The method of determination of the probability of non-failure operation of technical systems of the car (for example, the front suspension VAZ-2170). Fundamental research. 2014; 9-7:1425-1429. (in Russ.)

15. Ferreira C. A. New Methodology for Detection of a Loose or Worn ball joint used in vehicles suspension system. Gomes JFS, editor. Conf Theor Exp Mech Mater / 11th Natl Congr Exp Mech Porto/Portugal.2018;10(November):1–6.