Chaotic behavior in the rotational speed of internal combustion engines

• Autorzy: Rudzinskyi Volodymyr , Lomakin Volodymyr , Melnychuk Serhii , Yemets Bogdan , Lyashuk Oleg , Ryabchuk Oleksandr , Slobodian Liubomyr

Identyfikatory

DOI

10.20858/sjsutst.2025.127.14

• Języki publikacji: EN

Abstrakty

EN

This study investigates the chaotic behavior in the rotational speed of internal combustion engines. High-precision measurements of engine rotational speed were taken at discrete intervals of 0.36 degrees with time measured to a precision of 41 nanoseconds. The data was analyzed using various techniques from chaos theory and nonlinear dynamics, including Lyapunov exponent calculations, phase space reconstruction, and power spectral density analysis. Results reveal that engine rotational speed exhibits complex, chaotic behavior across different operating conditions. Lyapunov exponents ranged from -0.004 to 0.024, indicating varying degrees of chaos from near-stability to strong chaotic behavior. The strongest chaos was observed at certain idle speeds, while full gas conditions showed milder but persistent chaotic characteristics. The study demonstrates that rotational speed fluctuations in internal combustion engines go beyond simple periodic or random variations, suggesting that traditional linear models may be insufficient for accurately predicting and controlling engine behavior. These findings have significant implications for engine design, control strategies, and diagnostics. The authors provide access to the original datasets and analysis code, encouraging further research and collaboration in this field. This work contributes to a deeper understanding of engine dynamics and may lead to the development of more sophisticated, nonlinear approaches to engine analysis and optimization.

Słowa kluczowe

EN

rotational speed; rotation per minute; chaos; chaotic distribution; internal combustion engine

PL

prędkość obrotowa; obroty na minutę; chaos; chaotyczny rozkład; silnik spalinowy

• Wydawca: Wydawnictwo Politechniki Śląskiej
• Czasopismo: Zeszyty Naukowe. Transport / Politechnika Śląska
• Rocznik: 2025
• Tom: z. 127
• Strony: 237--255
• Opis fizyczny: Bibliogr. 19 poz.

Twórcy

autor

Rudzinskyi Volodymyr

• Department of Automobile Transport, Zhytomyr Agricultural Technical Professional College, Pokrovska Street 96, 10031 Zhytomyr, Ukraine

• https://orcid.org/0000-0002-0540-9740

autor

Lomakin Volodymyr

• Department of Automobile Transport, Zhytomyr Agricultural Technical Professional College, Pokrovska Street 96, 10031 Zhytomyr, Ukraine

• https://orcid.org/0000-0002-8159-0166

autor

Melnychuk Serhii

• Department of Automobile Transport, Zhytomyr Agricultural Technical Professional College, Pokrovska Street 96, 10031 Zhytomyr, Ukraine

• https://orcid.org/0000-0001-6387-6489

autor

Yemets Bogdan

• Department of Automobile Transport, Zhytomyr Agricultural Technical Professional College, Pokrovska Street 96, 10031 Zhytomyr, Ukraine

• https://orcid.org/0000-0003-1015-8859

autor

Lyashuk Oleg

• Faculty of Engineering of Machines, Structures and Technologies, Ternopil Ivan Puluj National Technical University, Ruska 56 Street, 46000 Ternopil, Ukraine

• https://orcid.org/0000-0003-4881-8568

autor

Ryabchuk Oleksandr

• General Technicalisciplines Department, Zhytomyr Agricultural Technical Professional College, Pokrovska Street 96, 10031 Zhytomyr, Ukraine

• https://orcid.org/0009-0009-1154-3194

autor

Slobodian Liubomyr

• Faculty of Engineering of Machines, Structures and Technologies, Ternopil Ivan Puluj National Technical University, Ruska 56 Street, 46000 Ternopil, Ukraine

• https://orcid.org/0000-0002-9191-6801

Bibliografia

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