The performance and emissions characteristics of a compressed natural gas spark ignition engine

• Autorzy: Abu Bakar R. , Semin , Idris A.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the experimental results of a spark ignition engine to evaluate its performance and emissions characteristics while using conventional fuel and alternative fuel; compressed natural gas (CNG). To evaluate the performance, the engine is operated between 1500-4000 rpm, under steady state condition with wide open throttle (WOT). The emissions test was performed with various constant loads at each speed. The first experiment is did by using conventional fuel and followed by CNG. The engine performance and emissions results such as brake power, brake specific fuel consumption (BSFC), CO, HC and NOx from CNG were measured and compared to conventional fuel. The experiment has performed at Automotive Laboratory Faculty of Mechanical Engineering, University Malaysia Pahang by using in-housed developed engine test rig. From the experiment being done it is demonstrated that the potential of reducing emissions while applying CNG as fuel is obvious. However, the further study of required improving the performance of the engine. The results and analysis will be useful for the development of dedicated CNG engine in the future. The application of CNG as fuel for spark ignition engine gives the average reduction power of 25% at WOT, 45% at POT and gives the average brake power reduction of 37% at WOT and 56% at POT base from spark ignition engine. Average BSFC of CNG are near about 33% higher than gasoline for WOT and 39% higher than gasoline for POT. The average CO emission reduction is reduction is 66% at WOT and 64% at POT. The average reduction of CO2 emission at WOT while using CNG is 6% and at POT only 1%. The average reduction of HC emission at WOT is 76% and at POT is 74%. The average reduction of NOx emission at WOT is 15% and at POT is 18%. The disadvantages of CNG as fuel in spark ignition engine has reduced power 37-56%, but the advantages for environment protection CNG as fuel has reduced the exhaust gas emissions.

Słowa kluczowe

EN

compressed natural gas engine; emission; performance; spark ignition

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2008
• Tom: Vol. 15, No. 2
• Strony: 9--14
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Abu Bakar R.

autor

Semin

autor

Idris A.

• University Malaysia Pahang Automotive Excellence Center, Faculty of Mechanical Engineering Locked Bag 12, 25000 Kuantan, Pahang, Malaysia tel.:[phone], fax: [phone],

Bibliografia

• [1] Heywood, J. B., Internal Combustion Engine Fundamentals, McGraw-Hill, Singapore 1998.
• [2] Poulton, M. L., Alternative Fuels for Road Vehicles. Computational Mechanics Publications, United Kingdom 1994.
• [3] Shasby, B. M., Alternative Fuels: Incompletely Addressing the Problems of the Automobile, MSc Thesis, Virginia Polytechnic Institute and State University, pp. 5-13, USA 2004.
• [4] Bakar, R. A., Semin, Ismail, A. R., Ali, I., Computational Modeling of Compressed Natural Gas as an Alternative Fuel for Diesel Engines, Proceeding of the 2nd ANGVA Conference, Bangkok, Thailand 2007.
• [5] Cho, H. M., He, Bang-Quan, Spark Ignition Natural Gas Engines - A review, Energy Conversion and Management Vol. 48, pp. 608-618, 2007.
• [6] Sera, M. A., Bakar, R. A., Leong, S., CNG Engine Performance Improvement Strategy through Advanced Intake System, SAE Technical Paper 2003-01-1937, USA 2003.
• [7] Shashikantha, Parikh P. P., Spark Ignition Producer Gas Engine and Dedicated Compressed Natural Gas Engine-Technology Development and Experimental Performance Optimization, SAE Technical Paper 1999-01-3515, USA 1999.