Study of HCCI-DI combustion and emissions in a DME engine
Study of HCCI-DI combustion and emissions in a DME engine
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DME 发动机中的 HCCI-DI 燃烧和排放研究
DOI：
10.1016/j.fuel.2009.05.008
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发表时间：
2009-11
期刊：
影响因子：
7.4
通讯作者：
Li, He
中科院分区：
文献类型：
--
作者：
Longbao, Zhou;Ying, Wang;Jie, Zhou;Li, He
HCCI 燃烧展示了同时减少 NOx 和 PM 排放的能力，并具有高制动热效率。然而，在整个发动机运行范围内可靠地使用完整的 HCCI 运行之前，仍然存在许多挑战，例如需要克服燃烧控制。最近，提出了 HCCI-DI 复合燃烧概念，这是对全 HCCI 的折衷，即仅预混合一部分燃料，并且部分燃烧仍然由直接喷射正时控制。本文对 DME 发动机中的 HCCI-DI 燃烧进行了研究。 HCCI 发动机的性能进行了比较。 HCCI-DI 的缸内峰值压力和最大放热率低于 HCCI 燃烧，并且随着端口 DME 吸气量的减少而降低。此外，HCCI-DI 燃烧的燃烧持续时间较长，并且随着端口 DME 吸气量的减少，燃烧持续时间会延长。发动机实验结果表明，与 HCCI 燃烧相比，HCCI-DI 燃烧可以扩大工作范围，并具有相对较高的制动热效率。 HCCI-DI 的 CO 和 HC 排放量低于 HCCI 发动机。 HCCI-DI运行时NOx排放量在低负荷时随着端口DME抽吸量的增加而显着下降，而在高负荷时则呈现增加趋势。为了控制 HCCI 的点火和燃烧阶段，评估了冷却 EGR 对 HCCI-DI 的影响。结果，NOx 排放量减少，发动机的工作范围扩大，适合采用冷却 EGR 的 HCCI-DI 燃烧。
HCCI combustion demonstrates the capability of simultaneously reducing NOxand PM emissions and having a high brake thermal efficiency. However, there are still many challenges such as combustion control to overcome before full HCCI operation can be used reliably over the full engine operation range. Recently, the HCCI-DI compound combustion concept is presented, which is a compromise to full HCCI in that only a portion of the fuel is premixed and a portion of combustion is still controlled by the direct injection timing. Investigations towards HCCI-DI combustion in a DME engine were carried out in this paper. HCCI engine performances were presented to make a comparison. The peak in-cylinder pressure and the maximum heat release rate for HCCI-DI were lower than those for HCCI combustion and they decreased with a decrease in port DME aspiration quantity. Moreover, combustion duration was longer for HCCI-DI combustion and it would elongate with a decrease in port DME aspiration quantity. Engine experimental results showed HCCI-DI combustion could extend the operating range with a comparatively high brake thermal efficiency in comparison to HCCI combustion. CO and HC emission for HCCI-DI were lower than those of HCCI engine. As for NOxemissions for HCCI-DI operation, it decreased remarkably at low loads with an increase in port DME aspiration quantity, while showed an increasing trend at high loads. To control the ignition and combustion phase of HCCI, the effect of cooled EGR on HCCI-DI was evaluated. As a result, NOxemission decreased and the engine’s operating range enlarged for HCCI-DI combustion with cooled EGR.
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DOI：
10.1115/1.1370373
发表时间：
2001-07
影响因子：
1.5
作者：
S. Sorenson
通讯作者：
S. Sorenson
DOI：
10.4271/950061
发表时间：
1995-02
期刊：
SAE transactions
影响因子：
--
作者：
T. Fleisch;C. I. McCarthy;A. Basu;C. Udovich;P. Charbonneau;W. J. Slodowske;S. Mikkelsen;James C. Mc
通讯作者：
T. Fleisch;C. I. McCarthy;A. Basu;C. Udovich;P. Charbonneau;W. J. Slodowske;S. Mikkelsen;James C. Mc
影响因子：
4.5
作者：
Junjun Ma;Xingcai Lu;Libin Ji;Zhen Huang
通讯作者：
Junjun Ma;Xingcai Lu;Libin Ji;Zhen Huang
影响因子：
2.6
作者：
M. Au;James W. Girard;R. Dibble;D. Flowers;S. Aceves;J. Martínez-Frías;Raymond F. Smith;Christian Seibel;U. Maas
通讯作者：
M. Au;James W. Girard;R. Dibble;D. Flowers;S. Aceves;J. Martínez-Frías;Raymond F. Smith;Christian Seibel;U. Maas
影响因子：
7.5
作者：
Elana Chapman;A. Boehman
通讯作者：
Elana Chapman;A. Boehman