VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University989710.18287/2541-7533-2021-20-3-97-109UnknownDevelopment of a methodology for calculating the working process of a small-size two-stroke internal combustion engineBiryukV. V.<p>Doctor of Science (Engineering), Professor of the Department of Thermal Engineering and Thermal Engines</p>teplotex_ssau@bk.ruGorshkalevA. A.<p>Senior Lecturer; Department of Thermal Engineering and Thermal Engines</p>Agorsh@bk.ruhttps://orcid.org/0000-0001-8448-7116ZakharovM. O.<p>Postgraduate Student</p>mzakharob95@gmail.comLarinV. L.<p>Postgraduate Student</p>vlad-larin@mail.ruSamara National Research University01122021203971093011202130112021Copyright © 2021, VESTNIK of Samara University. Aerospace and Mechanical Engineering2021<p>On the basis of the available theoretical calculations, methods for calculating the working process and power characteristics of internal combustion engines and the experimental studies carried out, a method for calculating the working process for small-sized two-stroke internal combustion engines was developed and tested. In the course of this work, the following results were obtained: the parameters of the working process and power characteristics of a small two-stroke internal combustion engine; the parameters obtained by calculation during the study of the Evolution 20GX2 engine were compared with the results of an experimental study. According to the results of the comparison, deviations in the values of the parameters of the engine under study from the results of the experimental study at the maximum power and maximum speed modes were identified.</p>Internal combustion enginetwo-stroke internal combustion enginethermal designheat balancefull-load curveДвигатель внутреннего сгораниядвигатель внутреннего сгорания двухтактныйрасчёт тепловойбаланс тепловойхарактеристика внешняя скоростная[EVO20GX2. User manual. Available at: https://www.horizonhobby.com/pdf/EVOE20GX2-Manual_EN.pdf][Kolchin A.I., Demidov V.P. Raschet avtomobil'nykh i traktornykh dvigateley: ucheb. posobie dlya vuzov [Calculation of automobile and tractor engines: Manual for university students]. Moscow: Vysshaya Shkola Publ., 2003. 496 p.][Gaevskiy O.K. Aviamodel'nye dvigateli. Deystvie, konstruktsii, ekspluatatsiya [Model aircraft engines. Operation, design, maintenance]. Moscow: DOSAAF Publ., 1973. 258 p.][Morgulis Yu.B. Dvigateli vnutrennego sgoraniya. Teoriya, konstruktsiya i raschet [Internal combustion engines. Theory, design and calculation]. Moscow: Mashinostroenie Publ., 1972. 336 p.]