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Performance and emission characteristics of QHCCI
dimethyl ether engine
- WANG Ying1, LI Wei1, ZHOU Longbao1, LIU Shenghua1, HU Tiegang2
Author information
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1.School of Energy and Power Engineering, Xi'an Jiaotong University; 2.Chang'an Automobile Co. Ltd
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History
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| Published |
| 05 Dec 2008 |
| Issue Date |
| 05 Dec 2008 |
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.
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References
1. Takeda Y, Nakagome K, Niimura K, et al.. Emission characteristics of premixed lean dieselcombustion with extremely early staged fuel injection. SAE 961163, 1996
2. Su Ling, Li Wei, Zhong Hui . Experimental investigation on emissions and performancesof a diesel engine operating on quasi-homogeneous charge compressionignition mode at low loads. Journal ofXi'an Jiaotong University, 2003, 37(11): 1147–1149 (in Chinese)
3. Gao Haiyang, Cao Huiling, Dong Xiqiang . Homogeneous premixed combustion technology of dieselengine. Vehicle Engine, 2001, 133(6): 1–5 (in Chinese)
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