Abstract：A 3-cylinder port fuel injection (PFI) engine fueled with methanol-gasoline blends was used to study combustion and emission characteristics. Cylinder pressure analysis indicates that engine combustion is improved when methanol is added to gasoline. With the increase of methanol, the flame developing period and the rapid combustion period are shortened, and the indicated mean effective pressure increases during the first 50 cycles. Meanwhile, a novel quasi-instantaneous sampling system was designed to measure engine emissions during cold start and warm-up. The results at 5°C show that unburned hydrocarbon (UHC) and carbon monoxide (CO) decrease remarkably. Hydrocarbon (HC) reduces by 40% and CO by 70% when fueled with M30 (30% methanol in volume). The exhaust gas temperature is about 140°C higher at 200 s after operation compared with that of gasoline.
出版日期: 2008-12-05
引用本文:
. Combustion characteristics of SI engine fueled
with methanol-gasoline blends during cold start[J]. Frontiers of Energy and Power Engineering in China, 2008, 2(4): 395-400.
SONG Ruizhi, LIU Shenghua, LIANG Xiaoqiang, Tiegang H U. Combustion characteristics of SI engine fueled
with methanol-gasoline blends during cold start. Front. Energy, 2008, 2(4): 395-400.
Denis J B, Thomas A C, Kenneth E H . The influence of fuel management on unburnt hydrocarbonemissions during the ECE 15 and US FTP drive cycles. SAE 950930, 1995
2
Zhou L B . Theory of Internal Combustion Engine. Beijing: China Machine Press, 1999, 219–230
3
Liu S H, Li H, Lv S C, et al.. Effects of methanol-gasoline blend on gasolineengine performance and emissions.Journal of Xi'an Jiao Tong University, 2006, 40(1): 1–4
4
Huang Y C, Zhou L B, Liu S H . Performances and combustion characteristics of a spark-igniteddirect-injection flexible fuel engine. Journal of Combustion Science and Technology, 2003, 9(6): 501–506
5
Cheng Y, Wang J X, Zhuang R J, et al.. Analysis of indicator diagram under cold-startand warm-up conditions of SI gasoline engine.Transactions of CSICE, 2002, 20(1): 62–68
6
Liao S Y, Jiang D M, Cheng Q, et al.. Investigation of the cold-start combustion characteristicsof ethanol-gasoline blends in a constant-volume chamber. Energy & Fuels, 2005, 19(3): 813–819. doi:10.1021/ef049733l
7
Shin Y, Cheng W K, Heywood J B . Liquid gasoline behavior in the engine cylinder of aSI engine. SAE 941872, 1994
8
Shayier P J, Belton C, Scarisbrick A . Emissions and fuel utilisation after cold starting sparkignition engines. SAE 1999-01-0220, 1999
9
Heneina N A, Tagomorib M K . Cold-start hydrocarbon emissionsin port-injected gasoline engines. Progressin Energy and Combustion Science, 1999, 25(6): 563–593. doi:10.1016/S0360-1285(99)00003-9
