Effects of diesel/ethanol dual fuel on emission characteristics in a heavy-duty diesel engine

2017 2nd International Seminar on Advances in Materials Science and Engineering

Liu, Junheng^1 ; Sun, Ping^1 ; Zhang, Buyun^1

School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, China^1

关键词: Anhydrous ethanol;    Aqueous ethanol;    Baseline engines;    Diesel consumption;    Diesel oxidation catalytic converters;    Dual fuel combustion;    Emission characteristics;    Heavy-duty diesel engine;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012190/pdf
DOI  :  10.1088/1757-899X/231/1/012190

来源: IOP

【 摘 要 】

In order to reduce emissions and diesel consumption, the gas emissions characteris-tics of diesel/aqueous ethanol dual fuel combustion (DFC) were carried out on a heavy-duty turbocharged and intercooled automotive diesel engine. The aqueous ethanol is prepared by a blend of anhydrous ethanol and water in certain volume proportion. In DFC mode, aqueous ethanol is injected into intake port to form homogeneous charge, and then ignited by the diesel fuel. Results show that DFC can reduce NOx emissions but increase HC and CO emissions, and this trend becomes more prominent with the increase of water blending ratio. Increased emissions of HC and CO could be efficiently cleaned by diesel oxidation catalytic converter (DOC), even better than those of diesel fuel. It is also found that DFC mode reduces smoke remarkably, while increases some unconventional emissions such as formaldehyde and acetal-dehyde. However, unconventional emissions could be reduced approximately to the level of baseline engine with a DOC.