一辆捷达轿车,正常行驶时,往右跑偏 分析故障原因 写出解决方案?
汽车作业
推荐回答(5个)
一、跑偏的定义 跑偏即汽车在直线行驶时,转向盘不处于中间位置,且车辆向某一边行驶,偏离直线行驶路线。直线行驶时,能感觉到方向盘往一边拉着的,要紧所握方向盘才行。

二、跑偏故障的原因1、左右前轮气压不相等或轮胎磨损不等。2、轮胎花纹不一样3、轮胎动平衡有问题4、两前轮轮毂轴承松紧度不一样5、前轮前束错误6、两前轮的定位角度不一样7、车架变形或左右轮距相差太大8、前后车轴不平行9、轮胎或钢圈变形10、某一车轮拖刹11、悬架变形12、前桥弯曲变形或摆臂安装位置不一致13、转向轴两侧悬架弹簧弹力不等。

三、诊断与排除1、检查轮胎胎压是否一致,不一致则先应加够气压,使气压处于一致的标准气压2、检查轮胎花纹是否一致,不一致应予以更换3、检查两前轮磨损情况,如果磨损区别太大,应予以更换4、检查轮毂轴承的松紧度,是否会有个别轮胎轮毂轴承发卡,如有发卡,应予以调整或更换5、检查是否存在拖刹,如有拖刹,则应检查维修6、检查轮胎动平衡是否达标,如不达标,则应先做好动平衡7、检查轮胎或钢圈是否变形,如变形,则应予以更换8、将汽车停放在平坦的地面上,察看汽车前部高度是否一致,若高度不一致,说明悬架弹簧折断或弹力不一致,应更换。9、测量两侧前后轮轮距是否相等,或不相等,则说明前后车轴不平行10、用四轮定位仪检测,看定位数据是否达标,不达标,则应予以调整11、对于事故车,则还应检查悬架,
车架,车桥,摆臂是否变形,如变形,则应予以更换处理
轮胎气压问题
轮胎两侧气压不一致是导致汽车跑偏的重要原因。如果两侧轮胎气压不一的话,它们接触地面的面积也是不同的,在正常路面上,气压低的轮胎摩擦力更大,所以在这种情况下,车辆会出现向气压偏低的那个轮胎一侧跑偏。
如何解决:如果发现车辆跑偏,还是先检测一下两侧轮胎的气压是否处于标准范围值内。检测轮胎气压的正确方法,是使用气压表,在轮胎冷却的状态下进行检测,如此才能保证检测出来的轮胎气压数值是准确的。如果发现确实是由于气压问题而造成的跑偏,就应及时补充好气压。随车配置风劲霸的车载打气泵LG600,自带的胎压表不但可以定期检查胎压,还可以在胎压不足、轮胎亏气、漏气时及时进行充气,同时可以快速泄压,确保驾车安全,有备无患。
四轮定位失准
对于行驶一段时间的车辆来说,四轮定位数据的变化会导致出现跑偏现象。前轮的外倾角、主销角度不正确,或前束角度太小等都会造成跑偏。四轮定位值失准后,车辆在转弯时会觉得方向沉重,轮胎会出现偏磨现象,从而造成跑偏。长期在路况差的路面上高速行驶也会导致四轮定位数据失准。
如何解决:出现以上故障现象,必须及时进行四轮定位调整。另外建议更换新胎或发生碰撞事故后都需要进行四轮定位调整。车主日常行车要注意路面情况,过大坑时减点速,只要是正常驾驶一般一两年是不需做四轮定位的。但如果有了状况就必须马上处理。
刹车系统问题
如果制动时车辆突然跑偏,往往是由于制动系统或悬架部份突然发生故障。这种故障虽然为数不多,但其危害很大,稍有不慎可能造成严重后果。具体跑偏的方向,为刹车出现问题的位置,需要及时的进行处理,以免影响整个刹车系统的使用。
如何解决:由于制动系统问题而造成的跑偏要及时检查刹车系统。首先要目测前轮的刹车盘片上有无油污、水湿或硬化等情况;在刹车盘和片都正常的情况下检查各制动分泵有无漏油、制动钳固定支板是否松动、摩擦片有无回位不顺等现象。
底盘故障
底盘由于日常行驶而造成的磨损和老化会造成车辆跑偏问题,当然也有可能是由于猛烈撞击造成的车架变形导致的。
如何解决:如果是下摆臂等部件出现了变化或者是间隙过大,调整或者更换零件就可以解决;而如果是因为发生事故造成的车体变形、车架受损等问题造成的跑偏,就比较严重了,需要大面积更换零件甚至要进行车架校正才可能完全恢复。
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