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Optimized Matching of an Ethanol-diesel Engine, Its Properties and Emission Characteristics

Author: LiNingNing
Tutor: YaoMingFa
School: Tianjin University
Course: Power Machinery and Engineering
Keywords: Diesel engine Ethanol-Diesel Fuel consumption Emission
CLC: TK421.5
Type: Master's thesis
Year: 2007
Downloads: 220
Quote: 1
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Abstract


Energy shortage and environmental pollution has become the world are facing two problems . Diesel engine with high thermal efficiency and high reliability have been more widely used , but diesel diffusion combustion mode determines the NOx emissions and soot emissions are relatively high , and compromise (\. Ethanol as a renewable oxygenated biofuels can improve this compromise between the particulate and NOx emissions and reduce the harmful emissions of diesel engines , and in recent years has been attached great importance to both at home and abroad . In this study, in a pressurized water - air intercooler direct injection diesel engine , diesel engine fueled with ethanol - diesel engine performance and emissions test on ethanol proportion of ethanol diesel engine performance and emissions ( smoke , HC, CO and NOx ) characteristics; and ethanol - diesel engine combustion system optimization. The results show that : the engine fueled with ethanol diesel fuel blend under high load , equivalent to the fuel consumption rate is decreased with the increase of the ethanol ratio in the low load , the ethanol ratio has little effect on the equivalent fuel consumption rate . Ethanol diesel and pure diesel , low-speed , low - load conditions , ethanol diesel soot emissions higher than that of pure diesel , and other conditions ethanol diesel soot emissions is lower than that of pure diesel with ethanol, a larger proportion of carbon reduce smoke emissions ; ethanol diesel HC emissions than pure diesel increased ; ethanol diesel CO emissions lower than pure diesel under high load , rather than pure diesel at low load ; low the ethanol diesel NOx emissions in most conditions pure diesel , but is slightly higher than that of pure diesel at low speed . Ethanol diesel engine combustion system optimization results showed that the , injector loop fuel injection quantity is increased by using E20 ethanol fueled with diesel engine power can be significantly improved ; ethanol fuel engine in order to balance power, economy and emissions levels , it is recommended to adopt an opening diameter of 60mm combustion chamber and the flow rate of 945 to 994 of the injector as E20 biodiesel matching program . The results of this study for the diesel engine fueled with ethanol fuel has important theoretical significance and practical value .

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CLC: > Industrial Technology > Energy and Power Engineering > Internal combustion engine > Diesel engine > Theory > Emission and purification
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