已阅读5页,还剩9页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
辽宁工程技术大学毕业设计(论文)11英文翻译原文AShortCourseonWheelAlignmentbyCharlesOfriaInitsmostbasicform,awheelalignmentconsistsofadjustingtheanglesofthewheelssothattheyareperpendiculartothegroundandparalleltoeachother.Thepurposeoftheseadjustmentsismaximumtirelifeandavehiclethattracksstraightandtruewhendrivingalongastraightandlevelroad.Thisarticlebeginswithinformationthatanymotoristshouldknow;however,ifyouareinterestedinlearningmoreaboutthistopic,clickontheunderlinedwordsformoredetailedexplanationsofeachterm.Wewillcovervariouslevelsofdetailwiththedeepestlevelscontaininginformationthatevenawheelalignmenttechnicianwillfindinformative.WheelAlignmentisoftenconfusedwithWheelBalancing.Thetworeallyhavenothingtodowitheachotherexceptforthefactthattheyaffectrideandhandling.Ifawheelisoutofbalance,itwillcauseavibrationathighwayspeedsthatcanbefeltinthesteeringwheeland/ortheseat.Ifthealignmentisout,itcancauseexcessivetirewearandsteeringortrackingproblems.Ifyouknowanythingaboutwheelalignment,youveprobablyheardthetermsCamber,CasterandToe-in.CamberCamberistheangleofthewheel,measuredindegrees,whenviewedfromthefrontofthevehicle.Ifthetopofthewheelisleaningoutfromthecenterofthecar,thenthecamberispositive,ifitsleaningin,thenthecamberisnegative.Ifthecamberisoutofadjustment,itwillcausetirewearononesideofthetirestread.Ifthecamberistoofarnegative,forinstance,thenthetirewillwearontheinsideofthetread.辽宁工程技术大学毕业设计(论文)2CamberwearpatternIfthecamberisdifferentfromsidetosideitcancauseapullingproblem.Thevehiclewillpulltothesidewiththemorepositivecamber.Onmanyfront-wheel-drivevehicles,camberisnotadjustable.Ifthecamberisoutonthesecars,itindicatesthatsomethingiswornorbent,possiblyfromanaccidentandmustberepairedorreplaced.CasterWhenyouturnthesteeringwheel,thefrontwheelsrespondbyturningonapivotattachedtothesuspensionsystem.Casteristheangleofthissteeringpivot,measuredindegrees,whenviewedfromthesideofthevehicle.Ifthetopofthepivotisleaningtowardtherearofthecar,thenthecasterispositive,ifitisleaningtowardthefront,itisnegative.Ifthecasterisoutofadjustment,itcancauseproblemsinstraightlinetracking.Ifthecasterisdifferentfromsidetoside,thevehiclewillpulltothesidewiththelesspositivecaster.Ifthecasterisequalbuttoonegative,thesteeringwillbelightandthevehiclewillwanderandbedifficulttokeepinastraightline.Ifthecasterisequalbuttoopositive,thesteeringwillbeheavyandthesteeringwheelmaykickwhenyouhitabump.Casterhaslittleaffectontirewear.Thebestwaytovisualizecasteristopictureashoppingcartcaster.Thepivotofthistypeofcaster,whilenotatanangle,intersectsthegroundaheadofthewheelcontactpatch.Whenthewheelisbehindthepivotatthepointwhereitcontactstheground,itisinpositivecaster.Pictureyourselftryingtopushthecartandkeepthewheelaheadofthepivot.Thewheelwillcontinuallytrytoturnfromstraightahead.Thatiswhathappenswhenacarhasthecastersettoofarnegative.Likecamber,onmanyfront-wheel-drivevehicles,casterisnotadjustable.Ifthecasterisoutonthese辽宁工程技术大学毕业设计(论文)3cars,itindicatesthatsomethingiswornorbent,possiblyfromanaccident,andmustberepairedorreplaced.Toe-inThetoemeasurementisthedifferenceinthedistancebetweenthefrontofthetiresandthebackofthetires.ItismeasuredinfractionsofaninchintheUSandisusuallysetclosetozerowhichmeansthatthewheelsareparallelwitheachother.Toe-inmeansthatthefrontsofthetiresareclosertoeachotherthantherears.Toe-outisjusttheopposite.Anincorrecttoe-inwillcauserapidtireweartobothtiresequally.Thistypeoftireweariscalledasaw-toothwearpatternasshowninthisillustration.Ifthesharpedgesofthetreadsectionsarepointingtothecenterofthecar,thenthereistoomuchtoe-in.Iftheyarepointedtotheoutsideofthecarthenthereistoomuchtoe-out.Toeisalwaysadjustableonthefrontwheelsandonsomecars,isalsoadjustablefortherearwheels.FourWheelAlignmentsTherearetwomaintypesof4-wheelalignments.Ineachcase,thetechnicianwillplaceaninstrumentonallfourwheels.Inthefirsttypethereartoeandtrackingischecked,butalladjustmentsaremadeatthefrontwheels.Thisisdoneonvehiclesthatdonothaveadjustmentsontherear.Thesecondtypeisafull4-wheelalignmentwheretheadjustmentsarefirstmadetotrueuptherearalignment,thenthefrontisadjusted.Afull4-wheelalignmentwillcostmorethantheothertypebecausethereismoreworkinvolved.Otherfactseverydrivershouldknowaboutwheelalignments.Aproperwheelalignmentshouldalwaysstartandendwithatestdrive.Thefrontendandsteeringlinkageshouldbecheckedforwearbeforeperforminganalignment.Thetiresshouldallbeingoodshapewithevenwearpatterns.Ifyouhaveatirewithexcessivecamberwear,forinstance,andyoucorrectthealignmentproblemthatcausedthatwear,thetirewillnowbemakingonlypartialcontactwiththeroad.(see辽宁工程技术大学毕业设计(论文)4illustrationonright)Pullingproblemsarenotalwaysrelatedtowheelalignment.Problemswithtires(especiallyunequalairpressure),brakesandpowersteeringcanalsoberesponsible.Itisuptoagoodwheelalignmenttechniciantodeterminethecause.AdvancedWheelAlignmentInformation.WhileCamber,Caster&Toe-inarethesettingsthatarealwayscheckedwhendoingawheelalignment,theyarenottheonlysettings.Belowisalistofthealignmentsettingsthatareimportantforawheelalignmenttechniciantoknowaboutinordertodiagnosefrontendproblems.CamberWhencamberspecificationsaredeterminedduringthedesignstage,anumberoffactorsaretakenintoaccount.Theengineersaccountforthefactthatwheelalignmentspecificationsusedbyalignmenttechniciansareforavehiclethatisnotmoving.Onmanyvehicles,camberchangeswithdifferentroadspeeds.Thisisbecauseaerodynamicforcescauseachangeinridingheightfromtheheightofavehicleatrest.Becauseofthis,ridingheightshouldbecheckedandproblemscorrectedbeforesettingcamber.Camberspecsaresetsothatwhenavehicleisathighwayspeed,thecamberisattheoptimalsettingforminimumtirewear.Formanyyearsthetrendhasbeentosetthecamberfromzerotoslightlypositivetooffsetvehicleloading,howeverthecurrenttrendistoslightlynegativesettingstoincreasevehiclestabilityandimprovehandling.CasterPositivecasterimprovesstraightlinetrackingbecausethecasterline(thelinedrawnthroughthes
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 2024年南昌市高三二模(第二次模拟测试)历史试卷(含答案 )
- 2024届云南省昆明市西山区高三下学期第三次质量检测文综及答案
- 大学毕业聚会发言稿 6篇
- 长信2022分红预案
- 初中音乐线上教学预案设计
- 一年级数学下学期家长会发言稿
- 2024届山东省滨州市惠民县高考压轴卷化学试卷含解析
- 上海市外国语大学附属中学2024年高考化学全真模拟密押卷含解析
- 北京市海淀区北方交大附中2024年高三下学期一模考试化学试题含解析
- 华东师大版2023-2024学年高三下学期一模考试化学试题含解析
- 12YJ4-1 常用门窗标准图集
- GB/T 23436-2009汽车风窗玻璃清洗液
- 浙江省基础教育地方课程(通用内容)标准1-9年级
- 社会信息采集平台
- 表- 氢气的理化性质及危险特性
- 尿检分析结果的解释与临床应用课件
- 粉尘清扫记录
- 都江堰市青城山风土人情旅游攻略PPT图文介绍课件
- 2022集控值班员题库(中、高级、技师)
- 《ICC色彩管理概述》课件
- yy0471.1-2004接触性创面敷料试验方法第1部分液体吸收性.pdf
评论
0/150
提交评论