Combustion and emission characteristics of a n-butanol HCCI engine

Combustion and emission characteristics of a n-butanol HCCI engine
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正丁醇 HCCI 发动机的燃烧和排放特性

DOI:
10.1016/j.fuel.2013.07.089
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发表时间:
2014
期刊:
影响因子:
7.4
通讯作者:
Hua Zhao
Hua Zhao
中科院分区:
工程技术1区
文献类型:
--
作者:
Bang-Quan He;Jie Yuan;Mao-Bin Liu;Hua Zhao

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作为一种有前途的替代燃料,生物丁醇,即正丁醇,可用于减少化石燃料消耗和二氧化碳排放的火花点火和均质充量压缩点火(HCCI)发动机。在一台燃用正丁醇的单缸进气道喷射四冲程发动机上,通过可变进排气门正时和升程装置,采用负气门重叠策略,在不同的相对空燃比下保持指示平均有效压力(IMEP)不变,实现HCCI燃烧。结果表明,在相同工况下,随着相对空燃比的增大,自燃起始点随转速的增大而提前,自燃始点适度延迟,燃烧持续期变化不大。此外,乙醛和乙醇的排放量分别远高于甲醛和甲醇的排放量。
As a promising alternative fuel, biobutanol, i.e.n-butanol, can be utilized to reduce fossil fuel consumption and carbon dioxide emissions from spark ignition and homogeneous charge compression ignition (HCCI) engines. In this work, the HCCI operation was achieved by the negative valve overlap strategy through variable exhaust and intake valve timing and lift devices on a single cylinder port fuel injection four-stroke engine fuelled withn-butanol when indicated mean effective pressure (IMEP) was kept constant at different relative air–fuel ratios. The results show that the onset of autoignition advances with engine speed while autoignition timing moderately delays and combustion duration slightly changes with the increase of relative air–fuel ratio at the same operating conditions. In addition, acetaldehyde and ethanol emissions are much higher than formaldehyde and methanol emissions, respectively.
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