外文翻譯--慣性與電動掛車剎車.doc

重慶理工大學(xué)翻譯二級學(xué)院機(jī)械工程學(xué)院班級學(xué)生姓名原文：eHowCarRepair&MaintenanceBrakeRepair&MaintenanceRepairTrailerBrakesInertiaVs.ElectricTrailerBrakesByEdmundGary,eHowContributorDangerousTsaysmoststateshaveregulationsgoverningtrailersweighingmorethan3,000pounds.Thereislittleifanyregulationfortrailersweighingunder3,000pounds.Ifatrailerisdesignedtocarry3,000pounds,itmusthaveaworkingbrakingsystem.Twotypesofbrakingsystemsareavailable:inertiatrailerbrakesandtheelectrictrailerbrakes.BrakeControllersElectricbrakecontrollersareautomobileoriginalequipmentmanufacturedoraftermarket-installeddevicemodules.Theyactivatethetrailerbrakesandareneededifthetraileruseselectricbrakes.Thecontrollersaremountedonorunderneaththetowvehiclesinstrumentpanelonthedriversside.Thecontrollerscancomeindifferentproductclasses,suchasproportionalorinertiabrakecontrollers.ElectricTrailerBrakesElectricbrakesfeedpowerfromthetowvehiclesbrakelightsintothecontroller.Thetrailerbrakesareactivatedbyaseparateheavy-dutycircuitthroughaplugandsocket.Thisallowsthebrakestoworkautomaticallywheneverthetowvehiclesbrakesareapplied.Properlyadjustedcontrollerscanallowtowvehicleandtrailercombinationtocometoastopassmoothlyasifthetowvehiclewasbyitself.InertiaTrailerBrakesInertiaactivatedbrakesofferssmoothstoppingresponseinmostsituations.AccordingtoRVtechnicianRegDeYoung,theinertiabrakeshasaninternalsensingdeviceorapendulumwhichsensesthetowvehiclesrateofdeceleration.Thesensingdevicethenappliestheamperagetothetrailerbrakesatthesamerateofdecelerationasthetowvehicle.DrawbacksofInertiaandElectricBrakesThependulumoftheinertiabrakesmaynotswingcorrectlybecauseofchangesintheangleorchanges,andthiscanleadtojerkystops,accordingtoHensleyManufacturing.Electricbrakestendheatuptoatemperatureof300degreesFahrenheit.Thischangestheresistanceinthemagnetsinthebrakesystem,whichleadstobrakefade.ConclusionTrailerbrakesareacrucialpieceofequipmentwhenthetrailerhasreachedaspecificweightthreshold.SomestatesintheUnitedStatesmayhaveverylittleregulationoftrailerbrakesforunitsunder3,000pounds,butitisbesttocheckthelocalregulationswherethetrailerwillbeoperated.譯文：慣性與電動掛車剎車EdmundGaryDangerousT說,大多數(shù)州都規(guī)定掛車的重量超過3000磅。幾乎沒有任何監(jiān)管對于3000磅以下的掛車。如果一個(gè)拖車被設(shè)計(jì)用于攜帶3000磅,它必須有一個(gè)工作制動系統(tǒng)。兩種類型的制動系統(tǒng)是可用的:慣性掛車車剎車和電動掛車剎車。制動控制器電制動控制器是汽車原始設(shè)備是制造或售后安裝設(shè)備的模塊。他們激活掛車剎車，如果需要也激活電動剎車。控制器被安裝在牽引車的駕駛員側(cè)的儀表盤上或下方。控制器可以有不同的產(chǎn)品類,如慣性制動控制器。電動拖車剎車電動剎車回饋系統(tǒng)從車輛的剎車燈回饋到電控制器中。拖車制動器是由一個(gè)單獨(dú)的電路，通過插頭和插座重新激活。這允許剎車自動工作只要掛車的剎車系統(tǒng)是應(yīng)用的。如果是拖車本身，適當(dāng)調(diào)整控制器可以讓牽引車和掛車組合順利停止。慣性掛車剎車激活慣性剎車系統(tǒng)在大多數(shù)情況下，能提供平穩(wěn)的停止響應(yīng)。根據(jù)房車技術(shù)員RegDeYoung所說,慣性制動器有一個(gè)內(nèi)部傳感裝置或一個(gè)鐘擺,感應(yīng)掛車減速的速度。然后，傳感裝置應(yīng)用安培數(shù)使掛車和牽引車以相同的速度減速。缺點(diǎn)慣量和電剎車鐘擺的擺動慣性剎車可能不正確,因?yàn)榻嵌入S時(shí)在變化。這可能會導(dǎo)致不平穩(wěn)停