Article ID Journal Published Year Pages File Type
205812 Fuel 2015 7 Pages PDF
Abstract

•Combustion and PM emissions from an SI engine fueled with methanol/gasoline blends were measured.•Effect of methanol on the particulate mass and number concentrations was investigated.•Comparison of particles in the nuclear and accumulation mode with methanol was evaluated.

In this work, three different ratios of methanol–ultralow sulfur gasoline blends, 0%, 15% and 45% of methanol in volume respectively for M0, M15 and M45, were tested on an electronically controlled multi-point port injection gasoline engine in National Grade IV standard. DMS 500SKII fast particulate spectrometer was used to measure the particulate mass and number concentrations and size distributions. The effect of methanol on the cylinder gas pressure and heat release rate was investigated based on the urban-speed mode at low and high engine load. Moreover, the particulate mass and number concentrations and size distribution were also measured based on the same test cycle for all testing fuels. In addition, the comparison of particulate number concentration in the nucleation mode and accumulation mode was evaluated from low to high engine loads. The experimental results show that the cylinder gas pressure and heat release rate increased significantly and occurred earlier by the use of methanol fuel. Particulate number and mass concentration decreased in low proportion methanol–gasoline while increased significantly in high proportion methanol–gasoline. For each testing fuel, the particulate number concentration in nucleation increased with the increase of engine load, while the number of particles in accumulation decreased from low to high vehicle loads.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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