Emission and Combustion Misfire of Engine with Oxygen-Enriched in Dynamic Start Process

2009 International Conference on Energy and Environment Technology Pub Date : 2009-10-16 DOI:10.1109/ICEET.2009.35

Qing Gao, Chengcai Liu, Y. Jin, Guangjun Zhang, C. Ma

{"title":"Emission and Combustion Misfire of Engine with Oxygen-Enriched in Dynamic Start Process","authors":"Qing Gao, Chengcai Liu, Y. Jin, Guangjun Zhang, C. Ma","doi":"10.1109/ICEET.2009.35","DOIUrl":null,"url":null,"abstract":"The investigation on the variable intake-air composition (oxygen concentration 21%-27%) in the start of a spark ignition engine aims to study the dynamic characteristics of combustion and emission to understand the feasibility improving the performance of engine. The oxygen-enriched air improves combustion, promotes the stability and reduces CO and HC obviously, and also results in a little higher NOx. Nevertheless the rise of NOx keeps the lower level in the start process. It is recognized that the oxygen enrichment in the start can bring a potential to control combustion and emission. Experiment results show that the function of oxygen-enriched intake air is more important in the lower degree of oxygen enrichment, such as 23%~25%. In the fact as the oxygen enrichment arrives in a higher level, the weaker the reducing HC and CO emissions therefore the lower oxygen enrichment in engine is much more profitable for a comprehensive low HC, CO and NOx emissions. Through detecting the misfire behavior by optical sensor, it is clear that the misfire rate decreases with oxygen-enrichment and it leads to the higher combustion stability in the mild oxygen-enrichment.","PeriodicalId":6348,"journal":{"name":"2009 International Conference on Energy and Environment Technology","volume":"9 1","pages":"117-120"},"PeriodicalIF":0.0000,"publicationDate":"2009-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 International Conference on Energy and Environment Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICEET.2009.35","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 2

Abstract

The investigation on the variable intake-air composition (oxygen concentration 21%-27%) in the start of a spark ignition engine aims to study the dynamic characteristics of combustion and emission to understand the feasibility improving the performance of engine. The oxygen-enriched air improves combustion, promotes the stability and reduces CO and HC obviously, and also results in a little higher NOx. Nevertheless the rise of NOx keeps the lower level in the start process. It is recognized that the oxygen enrichment in the start can bring a potential to control combustion and emission. Experiment results show that the function of oxygen-enriched intake air is more important in the lower degree of oxygen enrichment, such as 23%~25%. In the fact as the oxygen enrichment arrives in a higher level, the weaker the reducing HC and CO emissions therefore the lower oxygen enrichment in engine is much more profitable for a comprehensive low HC, CO and NOx emissions. Through detecting the misfire behavior by optical sensor, it is clear that the misfire rate decreases with oxygen-enrichment and it leads to the higher combustion stability in the mild oxygen-enrichment.

查看原文本刊更多论文

富氧发动机动态启动过程的排放与燃烧失火

对火花点火发动机启动时进气成分(氧气浓度21% ~ 27%)变化的研究，旨在研究发动机燃烧和排放的动态特性，了解提高发动机性能的可行性。富氧空气改善了燃烧，促进了稳定性，明显降低了CO和HC，但也导致了NOx的升高。然而，氮氧化物的上升在启动过程中保持较低的水平。人们认识到，开始时的富氧可以带来控制燃烧和排放的潜力。实验结果表明，富氧进气在富氧程度较低的情况下，如23%~25%，富氧进气的作用更为重要。事实上，当氧富集达到较高水平时，还原性HC和CO排放越弱，因此发动机中较低的氧富集对全面低HC、CO和NOx排放更有利。通过光学传感器检测失燃行为，可以清楚地看到，随着富氧的增加，失燃率降低，在轻度富氧的情况下，失燃率提高，燃烧稳定性提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2009 International Conference on Energy and Environment Technology

自引率

0.00%

发文量