试析lpg发动机试验数据采集与控制系统的研究

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1、福建农林大学硕士学位论文LPG发动机试验数据采集与控制系统的研究姓名：郭雷申请学位级别：硕士专业：农业机械化工程指导教师：黄敬党20040401-祸建农林天学壤土毕能论文摘要本滚霞骚襄搿发了LPG发动辍试验数据采繁冬控懿系笺，主要毽撂下鑫挺LPG发动机也控单元软硬袢设计和上位机jI菹控软件设计。系统监控软件界面友好、撵休简单、功能比较完善，可裳现在线数据采熟、数据存储、离线图形他处蠼等功能，并目I入数据蓐管理蔹寒予发穗枫试验蠹絮；瞧按孳嚣壹少量装搏鞫莲，戒本懿藤，整蛰比较巍，设计上熙有一定的冗佘度，并在

2、软硬嗣：中融入抗干扰设计，抗干扰能力较强；阐述了当前空燃}B控制策略，龄橱了以氧传感器输出信号作为艇馈。基于Pl控制对LPG艘动虮进孬空燃避薅巧控剿灏具体过程势壤嚣了控裁簸件。在残珐饕EC2500C汽海发凌掇避螽=改装成LPG单一燃料发动机基础上。通过试验裳明．本文所研究的控制方法可以察现LPG发动机空燃比控狲。在稳态：C况下可以取得较好的效果。实际应用表嚷，袋Hl本臻究并发魏系凌挺离了鼗霆采集效攀，对燕抉LPO发番瓤舅发瓣览器舂一是睡蠹冀。关键谰；LPG发动机，数据采集。她控单元，空燃比。Pl控制，般

3、控系统福建农林大学硬士学僦论文AbstractDataacquisitionandcontrolsystem§"LPGenginedesignedanddeveloped砖authorispresentedin氇ispaper,whoseresearchm鑫in{yinelndesthedesignofsoftwareandhardwareforelectroniccontrolunj‘andthedesignofsoftwareformonitoringsystem．Inthissystem．them

4、onitoringsoftwarehassuchfealumsasfriendlyinterfacebetweentheuserandthesystem，simplifiedoperation,powerful如actions．Itc甜lcarryondataacquisitiononlineandSffVetheopcradonvariablesofengineandtheparametersofECU。and渤displaygraphicallythesavingdataoffiineete，and

5、introducesdatabasemanagementtechniqueintoenginetestrig．TheECUiscomposedoffewerhardware．SOitisacheapbuthighlyperformancedevice．Hcanupdaresconvenientlywithredundancydesign,andhasstrongcapabilitytowiths‰mdtheelectromagneticinterferer％"efortheusingoftheanti-

6、interferencetechniqueindesign．Thispaperalsoexplicatestheairfuelcontrolstrategy,andanalysestheimplementofclosedloopcontrolbasedonPIcontrolandsignalompuaedfromexhaustgasoxygensensor’andmakethedesignofthesoftwareforcontroller．BasedonmodelEC2500(2engine,whic

7、hpreviouslyisagasolineengineandhasbeenadalaedtoLPGslngle-fuelsuccessfully,theexprimentalresultssh饼w畦thatcontrolmethodresearched瓤thispapercanrealizeairfuelcontrolforLPGengine，andCanachieveagoodperformanceundergeadycondition，Thesystem'sSuccessfulapplicatio

8、nshowedt11atitcanimprovetheefficiencyiBdataacquisition,andcanhebringsomehelpinthedevelopmentandstudyon啪engine。Keyword：LPGEngine，DataAcquisition，ElectronicControlUnit，AirFuelRatio。PIControl，MonitoringSystem¨一稀建农袜犬擎瞬士掌位论文l引言