-

Abstract

Today, due to the rapid decrease of resources such as petroleum and its derivatives and rapid increase global warming, the economic and effective use of internal combustion engines had become very significant. Therefore, intense studies about increasing the performance of the engines are performed. Determination of the engine performance has been done in two stages. At the first stage, the performance of the engine still in a draft form is determined through the cycle analysis in a theoretical way by using a mathematical model. At this stage each parameter of the engine is changed and its effect on engine characteristics is determined. At the second stage, experimental studies are done in accordance with theoretical work. In this study, a computer program was developed to simulate the performance of a twostroke reverse uniflow spark ignition engine by using MATLAB

Keywords

• Two stroke engine, simulation, engine performance, mathematical modeling

İki Zamanlı Ters-Doğru Akışlı Buji ile Ateşlemeli Bir Motorun MATLAB Yardımı ile Performans Analizi

Öz

Günümüzde, petrol ve türevi kaynakların hızla azalıyor olması ve küresel ısınmanın da hızla artması nedeni ile içten yanmalı motorların ekonomik ve efektif kullanımı hayli önemli hale gelmiştir. Bu nedenle, içten yanmalı motorların performanslarının iyileştirilmesi konusunda yoğun çalışmalar yapılmaktadır. Motor performansının belirlenmesi iki aşamada yapılmaktadır. Birinci aşamada, henüz tasarı halindeki motorun performansı çevrim analizi aracılığı ile teorik matematiksel model kullanılarak belirlenmekte, motor parametrelerinden her birinin motor karakteristiklerine etkileri incelenmektedir. İkinci aşamada, teorik çalışma doğrultusunda deneysel çalışmalar yapılmaktadır. Bu çalışmada, iki zamanlı ters doğru akışlı, tek silindirli, buji ile ateşlemeli bir motorun performansının analizi için MATLAB programlama dilinin kullanılmasıyla bir bilgisayar programı geliştirilmiştir

Anahtar Kelimeler

• İki zamanlı motor, simülasyon, motor performansı, matematiksel model

Kaynakça

1. N. Junga, A. T. Paterac, B. Haasdonkd, B. Lohmannb, Model order reduction and error estimation with an application to the parameter-dependent eddy current equation, Mathematical and Computer Modelling of Dynamical Systems, 17 (6) (2011), pp. 561–582. doi:10.1080/13873954.2011.582120
2. B. Babic, Z. Miljkovic, N. Vukovic, V. Antic, Towards implementation and autonomous navigation of an intelligent automated guided vehicle in material handling systems, Iranian Journal of science & Technology, 36 (M1) (2012) pp. 25-40. doi: 10.1007/s00170-012-4321
3. Y. Sekmen, P. Erduranlı, A. Koca, Mathematical modeling of a SI engine cycle with actual air-fuel cycle analyses, Mathematical and Computational Applications, 12 (3) (2007) , pp. 161-171.
4. K. JUNPEI, M. YASUO, Performance Tests of Reverse-Uniflow Type 2-Stroke Direct Injection
5. Gasoline Engine, Fisita World Automotive Congress, Barcelona, (2004) pp:1-9. doi:10.4271/2004- 32-0040
6. B. Omidi Kashani, The improvement of combustion process and reduction of unburned hydrocarbon emission in a two-stroke motorcycle, Iranian Journal of Science & Technology, Transaction B: Engineering, 28 (B4) (2004), pp. 505-508.
7. J. Galindo, H. Climent, B. Pla, V. D. Jimenez, Correlations for Wiebe function parameters for combustion simulation in two-stroke small engines, Applied Thermal Engineering, 31 (6-7) (2011), pp. 1190-1199. doi:10.1016/j.applthermaleng.2010.12.020
8. E. Abu-Nada, I. Al-Hinti, B. Akash, A. Al-Sarkhi, Thermodynamic analysis of spark-ignition engine using a gas mixture model for the working fluid, International Journal of Energy Research, 31 (2007) pp.1031–1046. doi: 10.1002/er.1296

9. P. Duret, A. Ecomard, M. Audinet, A new two-stroke engine with compressed air assisted fuel injection system for high efficiency low emissions applications, SAE Paper 880176, 1988. doi: 10.4271/880176
10. M. Nuti, R. Pardini, D. Caponi, Fast injection system: PIAGGIO solution for ULEV 2T SI engines, SAE Paper 970362, 1997. doi:10.1177/0954407011408649
11. F. Payri, J. Galindo, H. Climent, J.M. Pastor, C. Gaia, Optimisation of the scavenging and injection processes of an air-assisted direct fuel injection 50cc 2-stroke S.I. engine by means of modelling, SAE Paper 2001-01-1814, 2001. doi: 10.4271/2001-01-1814
12. J. Czerwinski, P. Compte, F. Reutimann, A. Mayer, Influencing (nano)particle emissions of 2-stroke scooters, International Journal of Automotive Technology 7 (N3) (2006) 237-244. doi:10.4271/2013- 24-0178
13. A. Kolchin, V. Demidov, Design Of a Automotive Engines. Mır Publishers, Moscow, 1984.