ems軟件及硬件系統(tǒng)設(shè)計

1、武漢理工大學(xué)碩士學(xué)位論文EMS軟件及硬件系統(tǒng)設(shè)計姓名：唐曉磊申請學(xué)位級別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：黃濤20070401AbstractEnginemanagementsystem(EMS)isoneofthekeypartsofthetechnologyinautomotiveindustryTheactionoftheinjectionmodel，ignitionmodelcouldbecontrolledproperlyS

2、othedrivabilitythepowerfuloutputthesafetythefueleconomyandemissionperformancecouldbeimprovedbyenginemanagementsystemAwholeenginemanagementsystemincludesengineelectronicallycontrolunit∞nsorsandactuatorsTheelectronicallyco

3、ntrolunitincludesh盯dware，softwareandcalibrationdataThesensorsincludeintakeairtemperature0“IA)，massairflow(MAF)，coolanttemperaturefrco)andsoonTheactuatorsmayincludeignitioncoil，exhaustgasrecycle，injectorandsoonHerewewillp

4、aymoreattentiontothedesignationofthehardwareandsoftwareoftheenginemanagementsystem，sothatthefunctionsandperformancescouldmeettherequirementoftheautomotiveindustryThesoftwareoftheenginemanagementsystemincludes5mainmodelsT

5、hemodelsareintakemodel，ignitioncontrolmodelinjectionmodel，idlespeedmodeldiagnosisandemergenceoperationmodelFirstlythemassairflow(MAY)iscalculatedbythesignalsfromthesensors；theenginestatesarebasedonenginespeedandthepositi

6、onofthethrottleThenwecangetthebasicignitionangleandbasicinjectiontime；theignitionanglecorrectionandinjectioncorrectionarecalculatedbasedontheenginestateandtheelectronicallyloads，thecorrectionscankeeptheairandfuelratioina

7、goodstate；thesignalsoftheenvironmentaremonitoringallthetimesotheabnormalconditionscouldbedetectedearlyinthedrivingcycleWhentheerrorisconfirmedbythesystemthedriver伽knowitbytheMIL(manufactureindicationlight)Thecontrolalgor