Low-vibration and low-noise internal combustion engine piston and connecting rod

The low vibration and low noise of the engine piston as a whole is ensured by a special U-shaped insert due to the calculated vertical-axial and horizontal-lateral elastic deformations of the insert springs, and the connecting rod by perforation in the rod. During ignition and combustion of fuel, the rod is elastically compressed, providing a change in the degree of compression, due to which mechanical loads on engine parts are reduced. In order to determine the effectiveness of ensuring low vibration and low noise of the piston and connecting rod, we have now started developing drawings for the manufacture of prototypes for two objects: the piston compressor 4122-210 (an analog of the Knorr-Bremze product), the braking system of a KAMAZ car and a 1H8.5/11 diesel engine. Experimental studies are planned to be conducted in the laboratory of marine internal combustion engines and diesel installations of St. Petersburg State Marine Technical University (SPbGMTU) as part of the Master's and then PhD theses. On the basis of the 4122-210 compressor and the 1H8.5/11 diesel engine, it is planned to create special universal experimental installations to evaluate the effectiveness of vibration and noise reduction tools not only at the source of occurrence, but also on the distribution routes, that is, non-traditional elastic suspensions of pipelines, supporting and non-supporting connections (shock absorbers and elastic couplings). One example of the adoption of support shock absorbers with an elastic cable element is their implementation on two refrigerated vessels of the Ivan Kulibin series in the DGA-500 amortization system with a 5AL25 drive diesel engine. These and other examples related to the problem of reducing vibration and noise on ships can be found in the publications of MAMSar authors.

1. Tarovik V.I., Kalyu V.A., Serov A.A. Draft program of systemic research and reglamentation of technogenic underwater noise of marine objects. Research Bulletin by Russian Maritime Register of Shipping. 2024. No. 77. P. 4 — 13. EDN APOTAZ. (In Russ.)

2. Zinchenko V.I., Karpuntsov A.E. Issledovanie udara porshnya v tronkovom dizele [Investigation of piston strike in a trunk-type diesel engine]. Trudy TsNIIMF [Transactions of the Central Research Institute of the Marine Fleet]. 1971. Issue 146: Avtomatizatsiya na morskikh sudakh [Automation in sea-going ships]. P. 93 — 109.

3. Skuridin A.A., Mikheev E.M. Bor'ba s shumom i vibratsiei sudovykh DVS [Combating noise and vibration of marine internal combustion engines]. Leningrad: Sudostroenie, 1970. 220 p.

4. Tuzov L.V., Bezyukov O.K., Afanas'eva O.V. Vibratsiya sudovykh dvigatelei vnutrennego sgoraniya [Vibration of marine internal combustion engines]. St. Petersburg: Politekhn. univ., 2012. 348 p.

5. Patent for invention No. 2750829. Internal combustion engine piston: appl. 01.12.2020, publ. on 05.07.2021, bul. No. 19 / Minasyan M.A., Minasyan A.M.; applicant St. Petersburg State Marine Technical University. 10 p.

6. Patent for invention No. 2182242. Internal combustion engine piston: appl. 27.12.1994, publ. on 10.05.2002, bul. No. 13 / Minasyan M.A.; applicant Kuznetsov Naval Academy. 5 p.

7. Patent for invention No. 2182243. Internal combustion engine piston: appl. 23.06.1995, publ. on 10.05.2002, bul. No. 13 / Minasyan M.A.; applicant Kuznetsov Naval Academy. 10 p.

8. Patent for invention No. 2182244. Internal combustion engine piston: appl. 01.08.1995, publ. on 10.05.2002, bul. No. 13 / Minasyan M.A.; applicant Kuznetsov Naval Academy. 6 p.

9. Patent for invention No. 2263804. Connecting rod and piston group: appl. 24.02.2004, publ. on 10.11.2005, bul. No. 31 / Minasyan M.A.; applicant Kuznetsov Naval Academy. 5 p.

10. Patent for a utility model No. 219613. Connecting rod of internal combustion engine: publ. on 27.07.2023, bul. No. 21 / Minasyan M.A., Minasyan A.M; applicant St. Petersburg State Marine Technical University. 8 p.

11. Connecting rod of internal combustion engine. Application FRG № 3339360, IPC No. F16C7/04, 1985 / Minasyan M.A. 6 p.

12. Patent No. 1767246. Connecting rod of internal combustion engine: appl. 15.10. 1990, publ. on 07.10.92, bul. No. 37 / Minasyan M.A. 7 p. (prototype).

13. Vasil'ev Yu.N. Novoe v konstruktsii sudovykh dizelei. Po materialam periodicheskoi i patentnoi literatury [New developments in marine diesel engine design. Based on periodical and patent literature]. Leningrad: Sudostroenie, 1972. 272 p.

14. Chainov N.D., Ivashchenko N.A., Krasnokutskii A.N., Myagkov L.L. Konstruirovanie dvigatelei vnutrennego sgoraniya: uchebnik / pod red. N.D. Chainova [Internal combustion engines construction: a textbook / ed. by N.D. Chainov]. Moscow: Mashinostroenie, 2008. 496 p.

15. Inventor's certificate USSR No. 1227837. Connecting rod of crankshaft assembly: appl. 28.04.1981, publ. on 30.04.86, bul. No. 16 / Istomin P.A., Minasyan M.A.

16. Inventor's certificate USSR No. 1267080. Connecting rod: publ. on 30.10.86, bul. No. 40 / Minasyan M.A.

17. Patent No. 2263804. Connecting rod and piston group: publ. on 10.11.2005, bul. No. 31 / Minasyan M.A.

18. Patent No. 2245463. Connecting rod of internal combustion engine: publ. on 27.01.2005, bul. No. 3 / Minasyan M.A.

19. Patent No. 2382245. Connecting rod of internal combustion engine: publ. on 20.02.2010, bul. No. 5 / Minasyan M.A.

20. Inventor's certificate USSR No. 1227837. Connecting rod of crankshaft assembly: publ. on 30.04.86, bul. No. 16 / Istomin P.A., Minasyan M.A.

21. Inventor's certificate USSR No. 1267080. Connecting rod: publ. on 30.10.86, bul. No. 40 / Minasyan M.A.

22. Patent No. 2263804. Connecting rod and piston group: publ. on 10.11.2005, bul. No. 31 / Minasyan M.A.

23. Patent No. 2245463. Connecting rod of internal combustion engine: publ. on 27.01.2005, bul. No. 3 / Minasyan M.A.

24. Patent No. 2382245. Connecting rod of internal combustion engine: publ. on 20.02.2010, bul. No. 5 / Minasyan M.A.