官维,宁德忠,盛利,等.当量天然气发动机各缸燃烧一致性的试验研究[J].内燃机工程,2023,44(1):60-67.
当量天然气发动机各缸燃烧一致性的试验研究
Experimental Research on Cylinder-to-Cylinder Combustion Consistency of Equivalent Natural Gas Engine
DOI：10.13949/j.cnki.nrjgc.2023.01.008
关键词:当量燃烧  天然气发动机  燃烧一致性  废气再循环  进气方式
Key Words:equivalent combustion  natural gas engine  combustion consistency  exhaust gas recirculation（EGR）  intake mode
基金项目:广西科技基地和人才专项（桂科AD21238029）
作者单位E-mail
官维* 广西玉柴机器股份有限公司，玉林 537000 gwei916@163.com 
宁德忠* 广西玉柴机器股份有限公司，玉林 537000 ningdezhong@yuchai.com 
盛利 广西玉柴机器股份有限公司，玉林 537000  
杨葵 广西玉柴机器股份有限公司，玉林 537000  
曾文芳 广西玉柴机器股份有限公司，玉林 537000  
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摘要:为研究废气再循环气体（exhaust gas recirculation， EGR）和进气方式对当量燃烧的天然气发动机燃烧特征的影响，通过发动机台架测试分别探究了EGR气体和EGR所含水汽以及5、6缸位置进气（右侧进气）与3、4缸位置进气（中间进气）对当量燃烧天然气发动机各缸燃烧一致性的影响规律。试验结果表明：在右侧进气方式下，EGR气体的引入是影响当量天然气发动机各缸燃烧一致性的重要因素，特别是EGR气体中的水汽在各缸的分配。EGR气体除水汽后，各缸最大缸压偏差值由原来的9.5%降低为4.1%，当不引入EGR气体时，各缸最大缸压偏差值降低为2.3%。基于右侧进气方式在引入EGR气体后存在的问题，采用新设计的中间进气方式有效改善了各缸EGR气体的分配，从而显著提高了各缸燃烧一致性，各缸最大缸压偏差值由原右侧进气方式的9.5%降低为2.0 %，有效解决了右侧进气在引入EGR时带来的各缸燃烧不一致性问题。
Abstract:In order to study the effect of exhaust gas recirculation（EGR） and intake mode on the combustion characteristics of the equivalent combustion natural gas engine， the effects of CO2 and the water vapor contained in EGR， as well as the intake modes including right-hand side and middle intakes on the combustion consistency of each cylinder of an equivalent combustion natural gas engine were investigated. The test results show that the introduction of EGR gas was an important factor affecting the combustion consistency of each cylinder of the equivalent natural gas engine under the current right-hand side intake mode， especially the distribution of the water vapor contained in the EGR gas in each cylinder. After removing water vapor from EGR exhaust gas， the maximum cylinder pressure deviation value of each cylinder was reduced from 9.5% to 4.1%. When EGR gas was not introduced， the maximum cylinder pressure deviation value of each cylinder was decreased further from 4.1% to 2.3%. Based on the problems existing in the current right-hand side intake method with the introduction of EGR gas， the newly designed intermediate air intake method effectively improved the distribution of EGR gas in each cylinder， thereby significantly improving the combustion consistency and the maximum cylinder pressure deviation value of each cylinder. The maximum cylinder pressure deviation value of each cylinder in the original right-hand side intake mode was reduced from 9.5% to 2.0%， which effectively solved the problem of combustion inconsistency of each cylinder.
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