Diagnosis of diesel cylinder leaks during transient mode idling
https://doi.org/10.46973/0201-727X_2025_3_99
Abstract
The paper presents the main ideas of a method for estimating the amount of air leakage from a diesel cylinder during compression, based on analyzing the rate of change of the in-cylinder pressure. A new diagnostic parameter is proposed, calculated using continuous signal measurements during the transition of an unloaded diesel engine from one speed mode to another. Unlike known methods using in-cylinder pressure, determining the proposed parameter does not require shutting off the fuel supply in the cylinders. In addition, the parameter is not sensitive to possible changes in the degree of compression across the cylinders, the air density at the cylinder inlet, and other factors that complicate the estimation of cylinder hydraulic tightness based on the pressure at the end of compression. The main results of the study were obtained during mathematical modeling and confirmed experimentally.
About the Authors
A. Yu. Konkov
Far Eastern State Transport University (FESTU)
Russian Federation
Russian Federation
Konkov Aleksey Yurievich, Chair “Railway Transport”, Doctor of Engineering Sciences, Professor
I. D. Konkova
Far Eastern State Transport University (FESTU)
Russian Federation
Russian Federation
Konkovа Irina Dmitrievna, Chair “Railway Transport”, Candidate of Engineering Sciences, Associate Professor
A. I. Trunov
Pacific National University (PNU)
Russian Federation
Russian Federation
Trunov Anton Igorevich, Higher School of Industrial Engineering, Candidate of Engineering Sciences, Associate Professor
References
1. Prosvirov, Yu. E. Reliability of operation and diagnostic methods of the cylinder piston group of internal combustion engines / Yu. E. Prosvirov, S. A. Basov // Vestnik Rostovskogo Gosudarstvennogo Universiteta Putej Soobshcheniya. – 2010. – No. 2 (38). – P. 40–45. – ISSN 0201-727X.
2. Control of the technical condition of the cylinder-piston group of a diesel locomotive during the pre-start cold rolling / V. V. Grachev, A.V. Grishchenko, F. Y. Bazilevsky [et al.] // BMSTU Journal of Mechanical Engineering. – 2023. – No. 9 (762). – P. 95–107. – DOI 10.18698/0536-1044-2023-9-95-107.
3. Investigation of the process of cold scrolling of a multi-cylinder diesel locomotive on a mathematical model / V. V. Grachev, A. V. Grishchenko, F. Yu. Bazilevsky, Yu. Yu. Shumilov // Maintenance and repair of rolling stock : proceedings of the second All-Russian scientific and practical conference with international participation (March 2025, Krasnoyarsk) – Krasnoyarsk : DCV Krasnoyarsk Railway, 2025. – P. 127–139.
4. Trunov, A. I. Mathematical model of processes in the indicator channel of a diesel locomotive / A. I. Trunov, A. Yu. Konkov // Vestnik transporta Povolzhya (Bulletin of Transport of the Volga Region). – 2021. – No. 1 (85). – P. 80–87. – ISSN 1997-0722.
5. Konkov, A. Yu. Features of the signal of the rate of change of in-cylinder pressure for diagnostics of a locomotive diesel engine / A. Yu. Konkov, I. D. Konkova, K. K. Demakov // Maintenance and repair of rolling stock : proceedings of the second All-Russian scientific and practical conference with international participation (March 2025, Krasnoyarsk) – Krasnoyarsk : DCV Krasnoyarsk Railway, 2025. – P. 172–182.
6. Diagnostics of automotive engines. – 2nd ed., rev. and add. / N. S. Zhdanovsky, V. A. Alliluyev, A. V. Nikolaenko, B.A. Ulitovsky ; edited by N. S. Zhdanovsky. – Leningrad : Kolos, 1977. – 264 p.
7. Konkova, I. D. Diagnostics of a diesel locomotive engine based on the signal of the rate of change of in-cylinder pressure : dissertation for the degree of Candidate of Technical Sciences : 05.22.03 / Konkova Irina Dmitrievna ; Far Eastern State Transport University. – Khabarovsk, 2021. – 154 p.
8. Diagnosis of diesel cylinder leakage based on the results of measuring the rate of change of intra-cylinder pressure / A. Yu. Konkov, A. I. Trunov, I. D. Konkova, Yu. A. Davydov // Bulletin of Pacific National University. – 2018. – No. 4 (51). – P. 9–16. – ISSN 1996-3440.
9. Lashko, V. A. Application of simulation methods of diesel engine operating processes in interpreting the results of a diagnostic experiment / V. A. Lashko, A. Yu. Konkov // BMSTU Journal of Mechanical Engineering. – 2007. – No. 6. – P. 46–53. – ISSN 0536-1044.
10. Puchkova, A. D. Model of heat generation in diesel cylinders and its computer implementation in the SCILAB/COS environment / A. D. Puchkova, A. Yu. Konkov, I. D. Konkova // Transport of the Asia-Pacific Region. – 2023. – No. 2 (35). – P. 99–105. – ISSN 2415-8658.
11. Konkov, A. Yu. Functional diagnostics of leakage of the cylinder-piston group of a diesel engine by the rate of change of intra-cylinder pressure / A. Yu. Konkov, I. D. Konkova, A. I. Trunov // Transport of the Asia-Pacific Region. – 2025. – No. 1 (42). – P. 79–86. – ISSN 2415-8658.
12. Konkov, A. Yu. Experimental verification of the method of diesel engine indexing based on asynchronous measurement of the rate of change of intra-cylinder pressure / A. Yu. Konkov, A. I. Trunov, K. K. Demakov // Bulletin of Pacific National University. – 2023. – No. 3 (70). – P. 7– 18. – ISSN 1996-3440.
Review
For citations:
Konkov A.Yu., Konkova I.D., Trunov A.I. Diagnosis of diesel cylinder leaks during transient mode idling. Vestnik Rostovskogo Gosudarstvennogo Universiteta Putej Soobshcheniya. 2025;(3):99-109. (In Russ.) https://doi.org/10.46973/0201-727X_2025_3_99
Views:
8
JATS XML
Email this article 