推荐回答(2个)
您好,购买二手车除了静态检测以外,动态检测——也就是我们常说的路试(试车),这是一个不容忽视的重要环节。毕竟车辆最终的驾驶情况如何,还是要“开出去跑跑”才能更为直观地了解。那么在试车环节都应该观察哪些点呢?今天就让我们一起来学习一下吧!
听发动机怠速的声音
并且感受是否有抖动
目的:检验发动机是否有颤抖,有无杂音。导致发动机抖动的原因有很多,譬如:点火线圈问题、火花塞问题、减振胶垫问题、油压不稳问题、积碳问题等等。
方法:把车开到一个相对安静的地方,将门窗关闭,点火启动发动机,把空调、音响全部关掉,挡位挂在N或者P挡。然后只需要用耳朵听发动机声音,感受是否有杂音,观察转速表,看指针是否上下浮动。最后手扶方向盘,注意力集中在手以及臀部,感受车辆是否有抖动。如果感觉平稳,则说明没有问题。
中低速行驶在水平路面松开方向盘
检验车辆是否跑偏
目的:通过该项测试检验车辆轮胎匹配问题、四轮定位是否有问题、刹车系统是否有问题(刹车分泵)、底盘问题(碰撞事故造成底盘扭曲)
方法:在测试前要确保车辆四个轮胎的胎压合适,并且找一条完全水平的道路。将车速提升到40公里/小时(车速不宜太快),稳定车速后双手离开方向盘,此时观察方向盘是否有上下位移,观察车辆是否有跑偏的问题。如行驶中没有出现跑偏问题,接下来轻踩刹车,再次检验是否有跑偏问题。如果行驶中以及制动过程中均没有出现跑偏问题,为可选车。如果出现比较严重的跑偏,请立即换车。
高速行驶下检验是否有风通过的风噪声
目的:考察车辆密封性,密封条、隔音棉是否有老化的问题。
方法:在测试前确保四窗紧闭,空调关闭且切换到内循环模式。首先将车速提升到100公里/小时速度下,仔细听左右A/B/C柱密封条部位、车头左右下方(贴近门缝)位置等,是否有“钻风”的声音。
调整不同车速感受车辆动平衡状况
目的:检验车辆是否存在动平衡问题。(不重要的问题,但会影响到车辆的价格。)
方法:将车速提升到80公里/小时,此时轻轻握住方向盘感受车辆是否有上下有规律的跳动,以及方向盘是否有轻微的抖动。如果没有异常情况,继续将车速提升到100公里/小时速度下,再感受一次。如果在该速度下仍然没有问题,最后将车速提升到120公里/小时速度下再次感受。如果一切都没有问题,说明该车动平衡无问题。 希望能帮到您,如果需要二手车鉴定检测,或对二手车检测感兴趣,欢迎私信给我。
这个只看查看是看不出来的,只有做详细的检查或者是要开上那么一段时间才可以看的出来。几乎是很难判断的了的。
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