THE INFLUENCE OF VALVE TIMING ON IN-CYLINDER PRESSURE SPARK IGNITION ENGINES PERFORMANCE CHARACTERISTICS
DOI:
https://doi.org/10.11113/jm.v46.493Keywords:
Valve timing, In-cylinder pressure, Engine performanceAbstract
The performance of the engine depends on many factors. One of the factors is valve timing known to be the timing of opening and closing of valves that has a significant effect on the in-cylinder performance. However, there is less information in the study about valve timing effect on single cylinder engine performances. In this study, the focus is to analyze in-cylinder pressure characteristics on a single piston fuel injection for a spark-ignition engine. This can be done by simulating the effects of valve timing on in-cylinder pressure. The methodology of this project will be simulation-based by using commercial one-dimensional software. The research results are engine performance parameters which are volumetric efficiency, brake torque, brake power, and cylinder pressure in 1000 to 5500 RPM engines. The results show a positive increment in engine performance from the baseline model (CTA240) which is 9.06% for brake power, 2.85% for brake torque, and 13.09% for volumetric efficiency. At low engine speed, it was also found improvement in cylinder pressure when advancing the intake valve timing opening (IVO) by 20 to 25 degrees bTDC. For high speed, the cylinder pressure was found to improve once the retardation of intake valve timing closing (IVC) was done between 40 to 45 degrees aBDC by comparing it with the baseline results. The result highlights the importance of intake valve timing setup by varying the opening and closing of the intake valve to give better output for engine performance.
References
J. B. Heywood, Internal combustion engine fundamentals. New York: McGraw-Hill, 1988.
I. Saad, S. Bari, and S. N. Hossain, In-cylinder air flow characteristics generated by guide vane swirl and tumble device to improve air-fuel mixing in diesel engine using biodiesel. Procedia Engineering, 2013. 56: p. 363-368.
I. Saad, and S. Bari, Improving air-fuel mixing in diesel engine fuelled by higher viscous fuel using guide vane swirl and tumble device (GVSTD). SAE Technical Paper, 2013.
A. Ibrahim, S. Bari, and F. Bruno, A study on EGR utilization in natural gas SI engines using a two-zone combustion model. SAE Technical Paper, 2007.
Seungju Baek, Seungchul Woo, Youngkun Kim, and Kihyung Lee, Prediction of turbocharged diesel engine performance equipped with an electric supercharger using 1D simulation. Energy, 2019. 185: p. 213-228.
Firas Basim Ismail, Ammar Al-Bazi, and Islam Gamal Aboubakr, Numerical investigations on the performance and emissions of a turbocharged engine using an ethanol-gasoline blend. Case Studies in Thermal Engineering, 2022. 39.
H Hong, G B Parvate-Patil, and B Gordon, Review and analysis of variable valve timing strategies—eight ways to approach. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2004. 218.
E. Sher, and T. Bar-Kohany, Optimization of variable valve timing for maximizing performance of an unthrottled SI engine—a theoretical study. Energy, 2002. 27:p. 757–775.
C. Gray, A Review of Variable Engine Valve Timing. SAE Technical Paper Series, 1988.
Thomas Dresner, and Philip Barkan, A Review of Variable Valve Timing Benefits and Modes of Operation. SAE Technical Paper Series, 1989.
Sawant, Pauras, and Bari, S., Effects of Variable Intake Valve Timings and Valve Lift on the Performance and Fuel Efficiency of an Internal Combustion Engine. SAE Technical Papers, 2018.
Fontana, G., and Galloni, E., Variable valve timing for fuel economy improvement in a small spark-ignition engine. Applied Energy, 2009. 86: p. 96–105.
Rosli, M. H. A., Hanipah, M. R., and Kettner, M., The tuning of a small four-stroke spark ignition engine for flexible valve timings through numerical approach. MATEC Web of Conferences, 2019.
Can Çinar, and Fazıl Akgün, Effect of Intake Valve Closing Time on Engine Performance and Exhaust Emissions in a Spark Ignition Engine. Journal of Polytechnic, 2007, 10(4): p. 371-375.
Li, L., Tao, J., Wang, Y., Su, Y., and Xiao, M., Effects of intake valve closing timing on gasoline engine performance and emissions. SAE Technical Papers, 2001.
Kakaee, H., Keshavarz, M., Paykani, A., and Keshavarz, M., Mathematical optimization of variable valve timing for reducing fuel consumption of a SI engine. Engineering Review, 2016. 36(1): p. 61–69.
Khudhur, S. H., Saleh, A. M., and Chaichan, M. T., The Effect of Variable Valve Timing on SIE Performance and Emissions. International Journal of Scientific & Engineering Research, 2015. 6(8): p. 173.
Sabaruddin, A. A., Wiriadidjaja, S., Mohd Rafie, A. S., Romli, F. I., and Djojodihardjo, H., Engine optimization by using variable valve timing system at low engine revolution. ARPN Journal of Engineering and Applied Sciences, 2015. 10(20). p. 9730–9735.
Fontana, G., Galloni, E., Palmaccio, R., and Torella, E., The influence of variable valve timing on the combustion process of a small spark-ignition engine. SAE Technical Papers, 2006.
Sher, E., and Bar-Kohany, T., Optimization of variable valve timing for maximizing performance of an unthrottled SI engine-a theoretical study. Energy, 2002. 27(8): p. 757–775.
Mariucci, V., Selamet, A., and Miazgowicz, K. D., Effect of primary intake runner tapers and bellmouths on the performance of a single cylinder engine. SAE Technical Papers, 2007.
J, E. D., Valve timing study of a single cylinder motorcycle engine. Universiti Malaysia Pahang, 2009.
Asmus, T. W., In valve events and engine operation. SAE Technical Paper Series, 2018.
Nitesh Dutt, Abhishek Binjola, Ankush Jageshwar Hedau, Ashwani Kumar, Varun Pratap Singh, and Chandan Swaroop Meena, Comparison of CFD Results of Smooth Air Duct with Experimental and Available Equations in Literature. International Journal of Energy Resources Applications (IJERA), 2022. 1(1): p. 40-47.
Muhammad Mubeen, Ashfaq Ahmad, Hafiz Mohkum Hammad, Muhammad Awais, Hafiz Umar Farid, Mazhar Saleem, Muhammad Sami ul Din, Asad Amin, Amjed Ali, Shah Fahad, and Wajid Nasim., Evaluating the climate change impact on water use efficiency of cotton-wheat in semi-arid conditions using DSSAT model. Journal of Water and Climate Change, 2020. 11(4): p. 1661-1675.
Downloads
Published
How to Cite
Issue
Section
License
Copyright of articles that appear in Jurnal Mekanikal belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions or any other reproductions of similar nature.
