Abstract
In order to further investigate the differences in combustion and emissions of butanol isomers on a dual fuel engine, the experimental study of combustion and emission characteristics was conducted on a heavy-duty 6-cylinder turbocharged diesel engine fueled with n-butanol/diesel and iso-butanol/diesel dual fuel under the condition of 1 280 J/cycle in-cylinder cycle energy at 1 500 r/min. The results show that the phases of maximum in-cylinder pressure, peak heat release rate and θCA10 advance, the maximum in-cylinder pressure, maximum in-cylinder mean temperature and combustion duration increase, the peak heat release rate, maximum pressure rise rate and NOx emission first increase and then decrease, HC, CO and particle emissions reduce with the advance of diesel injection timing in the mode of n-butanol/diesel and iso-butanol/diesel dual fuel combustion. Compared with the n-butanol/diesel dual fuel, θCA10,θCA50 and θCA90 of iso-butanol/diesel dual fuel advance, the ignition delay and combustion duration shorten, maximum in-cylinder pressure, peak heat release rate, maximum pressure rise rate, CO and particle emissions decrease, HC and NOx emissions increase at the premise of using the same diesel injection timing and butanol mixing ratio.
Key words
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n-butanol；iso-butanol；diesel；dual fuel；combustion；emission
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LI Xin，DONG Chao,HAN Weiqiang，LIU Xingwen，LI Bolun.
Experimental Study on Combustion and Emission-Characteristics of Butanol-Diesel Dual Fuel Engine[J]. Vehicle Engine. 2019, 0(2): 77-84 https://doi.org/10.3969/j.issn.1001-2222.2019.02.013
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