Frontiers in Energy
>> 2008,
Volume 2,
Issue 4
doi:
10.1007/s11708-008-0075-5
Performance and emission characteristics of QHCCI
dimethyl ether engine
1.School of Energy and Power Engineering, Xi'an Jiaotong University; 2.Chang'an Automobile Co. Ltd
Available online: 2008-12-05
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Abstract
Experimental investigation into the effects of different pilot amounts of dimethyl ether (DME) on the performance and emission of a single-cylinder direct-injection DME engine is conducted. The results show that a DME engine can operate at a wider range of speeds and loads at quasi-homogenous charge compression ignition (QHCCI) mode. The brake thermal efficiency increases while the exhaust temperature decreases. NO emission decreases by about 30%–50% although there is a slight increase in HC and CO emissions. NO, HC and CO emissions increase with an increase in the amount of DME pilot. QHCCI is a good way to increase thermal efficiency and decrease NO emission.
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