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International Journal of Automotive Technology > Volume 5(4); 2004 > Article
International Journal of Automotive Technology 2004;5(4): 311-319.
EFFECTS OF METHANOL-REFORMULATED FUELS ON TRANSIENT CHARACTERISTICS FOR AN SI ENGINE
C. H. JEON, S. H. CHOI, G. B. KIM, Y. J. CHANG
Pusan National University
ABSTRACT
There are many methods to test engine emissions depending on the regulations used such as FTP-75(CVS-75) mode, 10-15 mode and ECE-15 mode. Most of these modes consist of transient conditions such as cranking, rapid acceleration or deceleration modes. In this experimental research, the transient characteristics including cranking and accelerating mode in SI engines were studied to compare pure gasoline with methanol-reformulated fuels for performance and exhaust emissions. The results show that methanol-reformulated fuels have a better emissions reduction rate than that of pure gasoline especially for HC, CO and NOx emissions during cranking mode. The acceleration performances conform to the results of the distillation curve and the CO concentration for RM50 varies slightly in acceleration mode.
Key Words: Methanol-reformulated fuel, Cranking characteristics, Acceleration characteristics, Exhaust emissions
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