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. NOx emission decreases by about 30%–50% although there is a slight increase in HC and CO emissions. NOx, 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 NOx emission.
WANG Ying, LI Wei, ZHOU Longbao, LIU Shenghua, HU Tiegang
. Performance and emission characteristics of QHCCI
dimethyl ether engine[J]. Frontiers in Energy, 2008
, 2(4)
: 401
-405
.
DOI: 10.1007/s11708-008-0075-5
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