Performance and emission characteristics of QHCCI dimethyl ether engine |
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Authors: | Ying Wang Wei Li Tiegang Hu Longbao Zhou and Shenghua Liu |
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Affiliation: | (1) School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;(2) Chang’an Automobile Co. Ltd, Chongqing, 401120, China |
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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 directinjection 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
x
emission decreases by about 30%–50% although there is a slight increase in HC and CO emissions. NO
x
, 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
x
emission.
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Translated from Chinese Internal Combustion Engine Engineering, 2007, 28(3): 67–70 译自: 内燃机工程] |
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Keywords: | dimethyl ether (DME) quasi-homogenous charge compression ignition (QHCCI) emission |
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