Experimental study of the two-stroke engine equipped with a side outlet in the exhaust system pipeline
| Authors: Garipov M.D., Enikeev R.D., Zinnatullin R.F., Melkov A.A., Sakulin R.Y., Khalilov E.M. | Published: 13.07.2026 |
| Published in issue: #7(796)/2026 | |
| Category: Energy and Electrical Engineering | Chapter: Turbomachines and Piston Engines | |
| Keywords: two-stroke aircraft engine, tuned exhaust system, compression wave, expansion wave, outlet in pipeline, expansion chamber |
This paper presents the results of an experimental study of a two-stroke, two-cylinder, V-engine with tuned exhaust systems. The study examined an experimental exhaust system consisting of two individual pipes with side outlets and additional expansion chambers, and a conventional two-stroke engine system with conical sections and an expansion chamber. A comparison of the experimental results showed that the maximum engine power differed by no more than 1.5 %. Moreover, the mass of the experimental exhaust system can be more than two times lower and not exceed the mass of the exhaust system of an in-line engine with a single pipe with an expansion chamber for two cylinders.
EDN: BMELZO, https://elibrary/bmelzo
References
[1] Dixon J.C. The high-performance two-stroke engine. Haynes Publishing, 2005. 352 p.
[2] Blair G.P. Design and simulation of two-stroke engines. SAE, 1996. 647 p.
[3] Bell G. Two-stroke performance tuning. Haynes Publishing, 1999. 272 p.
[4] Rotax 503 UL operator’s manual. URL: https://www.easymanua.ls/rotax/503-ul/manual (accessed: 07.10.2025).
[5] Rudoy B.P., Vakhitov Yu.R., Glukhov K.V. et al. Experimental study of the reflection of finite-amplitude waves from a hole in a pipeline. V: Elementy teorii rabochikh protsessov DVS. Vyp. 1 [In: Elements of the theory of internal combustion engine operating processes. Iss. 1]. Ufa, UAI Publ., 1976, pp. 26–30. (In Russ.).
[6] Atanov S.N., Enikeev R.D. Experimental study of a new method of improving charging efficiency 4-stroke internal combustion engine by an intensification of additional charging. Vestnik UGATU, 2017, vol. 21, no. 1, pp. 38–44. (In Russ.).
[7] Atanov S.N. Investigation of the possibility of wave additional сharging of the 4-stroke engine by air through an inlet valve by exhaust compression wave. Vestnik UGATU, 2013, vol. 17, no. 3, pp. 209–216. (In Russ.).
[8] Atanov S.N. [Boosting a single-cylinder, four-stroke internal combustion engine by air recharging using compression waves generated during exhaust in simple, individually tuned gas-air tracts without drive elements]. Sb. nauch. tr. Mezhdunar. nauch.-tekhn. konf. Dvigatel-2018 [Proc. Int. Sci.-Tech. Conf. Engine-2018]. Moscow, Bauman MSTU Publ., 2018, pp. 208–218. (In Russ.).
[9] Rudoy B.P., Vakhitov Yu.R., Chernousov A.A. [Calculation of noise in a pulsed gas jet]. V: Voprosy teorii i rascheta rabochikh protsessov teplovykh dvigateley. Vyp. 21 [In: Theory and calculation of heat engine operating processes. Iss. 21]. Ufa, UGATU Publ., 2007, pp. 53–57. (In Russ.).
[10] Rudoy B.P. Prikladnaya nestatsionarnaya gidrogazodinamika [Applied non-stationary fluid dynamics.]. Ufa, UAI Publ., 1988. 182 p. (In Russ.).
[11] Chernousov A.A. Model of interaction of finite-amplitude waves with channel branching. Polzunovskiy vestnik, 2006, no. 4–1, pp. 182–185. (In Russ.).
[12] Rudoy B.P., Vakhitov Y.R., Enikeev R.D. Improving engine performance and noise level, using the ALBEA simulation technique. Proc. Inst. Mech. Eng. D, 2004, vol. 218, no. 12, pp. 1447–1453, doi: https://doi.org/10.1243/0954407042707687
[13] Rudoy B.P., Chernousov A.A. A model of the interaction of a finite-amplitude wave with an opening in the side wall of a channel. V: Voprosy teorii i rascheta rabochikh protsessov teplovykh dvigateley. Vyp. 21 [In: Theory and calculation of thermal engine operating processes. Iss. 21.]. Ufa, UGATU Publ., 2007, pp. 43–52. (In Russ.).
[14] Glukhov K.V. Ispolzovanie effekta vzaimodeystviya voln konechnoy amplitudy s otverstiem v truboprovode pri proektirovanii i dovodke vypusknykh sistem dvukhtaktnykh DVS. Diss. kand. tekh. nauk [Using the effect of interaction of finite-amplitude waves with an opening in a pipeline in the design and fine-tuning of exhaust systems of two-stroke internal combustion engines. Kand. tech. sci. diss.]. Ufa, 1992. 163 p. (In Russ.).
[15] Rudoy B.P., Galiullin F.F., Lobanov N.V. Sposob vypuska potoka otrabotavshikh gazov dvukhtaktnogo dvigatelya vnutrennego sgoraniya i glushitel shuma [Method of discharging exhaust gases in two-stroke internal combustion engine and silencer]. Patent RU 2099552. Appl. 12.09.1995, publ. 20.12.1997. (In Russ.).
[16] Rudoy B.P., Galiullin F.F., Lobanov N.V. Sposob organizatsii protsessa vypuska vykhlopnykh gazov i snizheniya urovnya shuma vykhlopa dvukhtaktnogo dvigatelya vnutrennego sgoraniya i ustroystvo dlya ego osushchestvleniya [Method and device for organizing gas exhaust process and reducing exhaust noise level in two- stroke internal-combustion engine]. Patent RU 2131518. Appl. 16.07.1996, publ. 10.06.1999. (In Russ.).