汽车专业毕业论文翻译中英文（全）automobileengineinjectionignition-

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1、AutomobileEngineInjectionandIgnitionUsingtheMotorolaMPC555MicrocontrollerRickWagonerInformationEducationandTechnology645,Section001ProfessorDr.YudiGondokaryonoMay2,2006AutomobileEngineInjectionandIgnitionIntroductionAutomobileenginesandpowertrainshavebecomeamajorgrowthareaformicr

2、ocontrolleruse.Thisgrowthisalsoexpectedtocontinue.Asmanynewregulationsconcerningtheexhaustemissionsandfuelefficiencymustbemetthenmoreandmoremicrocontrollersonautomobileswillberequired.Oneareathatcurrentlymakesuseofamicrocontrolleristhatoffuelinjectionandengineignition.Thesetwoare

3、ascanbothbecontrolledinamannerthatcangreatlyincreasefuelefficiency，lowerexhaustemissions,andalsoimproveenginepowerperformance.Let’sbeginbylookingatfuelinjection.Injectingtheproperamountoffuelintotheengineatthepropertimeallowstheenginetooperateapeakperformancelevels.Thisprocesscan

4、beaccomplishedwithouttheuseofamicrocontroller.However，duetothemanyfactorsaffectingwhatconstitutestheproperamountandpropertimemakestheuseofamicrocontrollermuchmoreappealing.Themicrocontrollercangatherthereadingsfromsensorsconnectedtomanycomponentsontheenginetoperformcalculationsde

5、terminingtheproperamountandpropertimefortheinjectionprocesstooccur.Thehigherthetemperatureontheenginethebetterthefuelbums.Asthefuelburnsmoreefficientlylessfuelisrequiredtogeneratethesameamountofenergy.Havingatemperaturesensoronthemotorprovidinginputtothemicrocontrollerallowsforad

6、justmentoftheamountoffuelbeinginjectedintothemotortoprovidethesameamountofengineoutputenergy.Thesecalculationsarequitecomplexandthuswouldtakesometimeforapersontoperform.Themicrocontrollercangatherthedata，performthecalculations，andmakethenecessaryadjustmentsinafractionofasecond.Th

7、egatheringandadjustmentprocesscanthusbeperformedmanytimespersecondallowforcontinuouslevelsofhigherengineperformance.Likewise,theignitionprocesscanalsobecontrolledinasimilarprocess.Ignitionneedstooccuratatimethatwillallowtheenginetoprovidethemostenergyforuse.Iftheignitionis‘fired’

8、exactlywhenthepistonisatitshighestpointt