Experimental investigation of methanol dissociated gas addition to gasoline in a spark ignition engine

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Li, Bo^1 ; Jiang, Yankun^1

School of Energy and Power Engineering, Huazhong University Science and Technology, 430074, China^1

关键词: Brake thermal efficiency;    Emission characteristics;    Experimental investigations;    Gasoline mixtures;    Nitrogen oxide emissions;    Performance tests;    Specific fuel consumption;    Thermal efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/3/032057/pdf
DOI  :  10.1088/1755-1315/189/3/032057

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

This work investigates the performances and emission characteristics of a spark ignition (SI) engine fuelled with methanol dissociated gas and gasoline mixtures. The dissociation system for methanol was designed, methanol dissociated gas was blended to the gasoline up to 20% by volume, and experiments were conducted within a four-cylinder, four-stroke and water-cooled spark ignition (SI) engine. Performance tests were carried out via measuring brake thermal efficiency, equivalent specific fuel consumption, and exhaust emissions (CO, HC, NOx) with a constant speed of 2000 rpm at stoichiometric condition. The results indicate that an increase in methanol substituted ratio has slightly lowered the engine torque. The addition of methanol dissociated gas decreases the equivalent specific fuel consumption and increases the effective thermal efficiency from the economical point of view. And the exhaust emissions decrease by about 33% and 28% of the mean average values of CO and HC emissions when the proportion of methanol substitution was 20% comparing to pure gasoline. However, nitrogen oxide emission values increased with the adding of methanol dissociated gas.