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According to China's “oil-poor, gas-litte, coal-rich” structure of energy resources, to promote the development of coal-based methanol fuel as a clean alternative to gasoline and diesel fuel is one of the most realistic options. So the adaptability of methanol gasoline blend fuel used in the gasoline engine and vehilce should be investigated. Engine load performance, engine out emission, air fuel ratio variation and combustion characteristics were tested in a PFI Euro III gasoline engine using gasoline, M10, M15, M20, M30 as fuel without any modification of the engine. Air fuel ratio, light-off temperature and load characteristics of catalystic conversion coefficient were also investigated. And effects of methanol content on fuel consumption and vehicle out emissions of a Euro - vehicle are analyzed.

In this paper, the detailed chemical kinetics was implemented into the three-dimensional CFD code to study the combustion process in HCCI engines. An extended hydrocarbon oxidation reaction mechanism (89 species, 413 reactions) used for high octane fuel was constructed and then used to simulate the chemical process of the ignition, combustion and pollutant formation in HCCI conditions. The three-dimensional CFD / chemistry model (FIRE/CHEMKIN) was validated using the experimental data from a Rapid Compression Machine. The simulation results show good agreements with experiments. Finally, the improved multi-dimensional CFD code has been employed to simulate the intake, spray, combustion and pollution formation process of the gasoline direct injection HCCI engine with multi-stage injection strategy. The models account for intake flow structure, spray atomization, spray/wall interaction, droplet evaporation and gas phase chemistry in complex multi-dimensional geometries.