• Title/Summary/Keyword: Methanol reformulated fuel

Search Result 5, Processing Time 0.021 seconds

An Experimental Study on the Performance and Characteristics of Emission for an S.I. Engine with Methanol-Reformulated Fuel (메탄올 개질 연료를 이용한 S.I. 엔진의 성능 및 배기 배출물 특성에 관한 연구)

  • Jang, Yeong-Jun;Choe, Seung-Hwan;Ha, Cheol-Ho;Jeon, Chung-Hwan
    • Transactions of the Korean Society of Mechanical Engineers B
    • /
    • v.25 no.9
    • /
    • pp.1193-1200
    • /
    • 2001
  • There are many regulation test methods to be related with engine emissions such as CVS-75, D-13, ECE-15 modes and so on. Most of these modes are consisted of lots of transient conditions that have rapid acceleration, deceleration and cranking modes. In this experimental research, the engine characteristics of cranking, accelerating and power output in a S.I. engine were studied to compare with neat gasoline and alternative fuels of M30 (methanol 30%, aromatic series 32%, non-aromatic 38%) and M50 (methanol 50%, aromatic 30%, non-aromatic 20%) for performance and exhaust emissions. The results show that reformulated methanol fuels are better emissions reduction of 15.7% over than that of neat gasoline fuel especially in HC and CO emissions at cranking mode. And the accelerating performances coincide with the results of distillation curve. CO concentration for M50 fuel is varied in a just little for the condition of slow acceleration. At wide-open throttle condition, brake specific energy consumption of reformulated fuels is increased and thermal efficiency is some what lower than that of gasoline fuel.

EFFECTS OF METHANOL-REFORMULATED FUELS ON TRANSIENT CHARACTERISTICS FOR AN SI ENGINE

  • Choi, S.H.;Kim, G.B.;Chang, Y.J.;Jeon, C.H.
    • International Journal of Automotive Technology
    • /
    • v.5 no.4
    • /
    • pp.311-319
    • /
    • 2004
  • There are many methods to test engine emissions depending on the regulations used such as FTP-75(CYS-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.

A Study on Characteristics of the SI Engine Using Methanol Reformulated Fuels (메탄올 개질연료를 사용한 가솔린 기관 실험 연구)

  • Lee, Suk-Young;Jeon, Chung-Hwan
    • Journal of Energy Engineering
    • /
    • v.19 no.1
    • /
    • pp.25-31
    • /
    • 2010
  • In this experimental research, it was studied to compare with pure gasoline and the fuels of RM50 (reformulated methanol fuel) for performance and exhaust emissions without reconstruction of engine systems. RM50 has a wider range of combustion limitation, which is one of the methanol's characteristics. This causes a stable driving state of RM50 in the experimental condition of unstable state and a low cycle by cycle variation which is used to determine the driving state. It is determined that fuel stability is better because cycle by cycle variation varies within 10%, therefore, driving characteristics is relatively good. In all conditions, RM50 has lower exhaust emissions of CO, HC, NOx than gasoline fuel, however, RM50's noise characteristics are 0.5~2dB higher at all condition, and in the result of the experiments of rubber fusion, it increases the utility possibility of RM50.

A Numerical Analysis on Combustion Characteristics of the Gasoline Engine using Methanol Reformulated Fuels under WOT Condition (전부하 운전조건에서 메탄올 개질연료를 사용한 가솔린 엔진의 연소특성에 대한 수치해석)

  • Lee, Suk-Young;Jeon, Chung-Hwan
    • Journal of Energy Engineering
    • /
    • v.20 no.2
    • /
    • pp.163-169
    • /
    • 2011
  • This research is to decide the possibility of using RM50(reformulated methanol fuel) without any modification of engine by the method of numerical analysis. Comparing the heat release rate, the difference among each fuel was decreased according to the increase of the engine speed, and the maximum heat release rate was higher in the order of RM50 and gasoline fuel. Also, this order corresponds to the order of burning speed. RM50 had the higher turbulent burning speed, and the curve of turbulent intensity was showed similar tendency to the curve of turbulent burning speed. RM50 had relatively high burning speed, short quenching length, high temperature in cylinder, so that it might increase NO emission, but owing to chemical reaction dynamics, it was decreased NO emission. Therefore, in order to predict the possibility of using RM50, it is needed to consider not only the temperature in cylinder by low heating value, but also combustion characteristics including burning speed.

A Study on the Exhaust Emission of LPG and Gasoline Vehicle (LPG와 가솔린 연료의 차량 배출가스 특성에 대한 비교 연구)

  • 정성환;한상명
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.10 no.5
    • /
    • pp.23-28
    • /
    • 2002
  • As the interest on the air pollution is gradually rising up at home and abroad, automotive industries have been working on the exhaust emission reduction from vehicles through a lot of approaches, which consist of new engine design, innovative aftertreatment systems, and using clean fuels. Methanol, ethanol, LNG, LPG, H2, reformulated gasoline are generally recognized as the clean fuel. Since the low price policy of government on LPG has expanded its vehicle market recently, there is concern of the exhaust emission of LPG vehicle. In this paper, we studied the value of LPG fuel as a clean fuel by comparing the results of the exhaust emission from LPG and Gasoline fueled vehicles, and discussed its limitation of LPG vehicle with mixer type as a fuel supply system. FTIR was used to understand the difference of exhaust emission components of LPG and Gasoline fueled vehicles.