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ID:37361336
大小:2.49 MB
页数:61页
时间:2019-05-22
《稀燃发动机电控系统设计研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、天津大学硕士学位论文稀燃发动机电控系统设计研究姓名:牛亮申请学位级别:硕士专业:电力电子与电力传动指导教师:万健如20061201ABSTI认CTAstheenergysourcecrisiscontinuouslyincreases,fueleconomyofautomobileshasbecomethekeyproblemwhichinfluencesthedevelopmentofautomobileindustry.Leanbumtechnologyoffersconsiderablepotentiality
2、inimprovinggasolineenginefueleconomy.Tosatisfythespecialrequirementsofleanburntechnologyandtheemissioncontrolofgasolineengine,allelectroniccontrolsystemsuitableforleanbumgasolineenginehasbeendeveloped.Thissystemcanachievetwicelnjectionandcontroltheproportionoft
3、hefuelinjectedatthefirsttimetothesecondtimeandtheinjectionangles.ItcanalsoadjustmixturetoberichperiodicallyforashorttimewhichenablestheNOxstorage.reductioncatalysttowork,SOtheemissioncanbereduced.Ⅵmilethemixture’Sdensitychanges,theconstantoutputpowerISobtainedb
4、ysynchronizedcontroloftheignitiontimeandthrottleopening.TheECUofthesystemhasC167seriessingle-chipasitsmicroprocessor,andcontrolstheengineinthecentralizedway.TheECUCanfunctionasthoseoftheadvancedautomobilesandalsohascertainabilitytoextenditscapability.Usingfuzzy
5、parameterself-tuningPIDcontroller,thefluctuationofthespeedduringthetransitionaltimecanbeadjustedwithintheestimatedandacceptablerange.ThesystemismainlyusedinleanburnexperimentonYH465gasolineengine.ExperimentsshowthatQuasi.HomogeneousLeanMixtureCombustionandafter
6、treatmentbyNOxstorage-reductioncatalystconvenerisfeasibleforleanburntechnologyanditsemission,andthisleanburngasolineelectroniccontrolsystemcanbasicallvsatisfytherequirementsofaccuracyandspeedofcontr01.Inaddition,ithasreliableperformances,strongresistancetodistu
7、rbance,perfectfunctionandconvenientuse.KeyWords:Leanbum;Gasolineengine;Airfuelratio(AFR);Engineelectroniccontrolsystem;NOxemission独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作和取得的研究成果,除了文中特别加以标注和致谢之处外,论文中不包含其他人已经发表或撰写过的研究成果,也不包含为获得墨盗基堂或其他教育机构的学位或证书而使用过的材料。与我一圊工作的同志对本研究所做的任
8、何贡献均己在论文中作了明确的说明并表示了谢意。学位论文作者签名:纬。完I签字日期:矽p易年,砂月w日学位论文版权使用授权书本学位论文作者完全了解:叁壅盘鲎有关保留、使用学位论文的规定。特授权叁鎏盘鲎可以将学位论文的全部或部分内容编入有关数据库进行检索,并采用影印、缩印或扫描等复制手段保存、汇编以供查阕和借阕。同意学校向国家有关部门或机构送交论文
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