Q: How does a smog test work?

asked byNovember 18, 2016

how does a smog test work

我的汽车有150000英里。
My car has an automatic transmission.

Tune-up $203.15 - $1046.06 获取报价

烟雾测试的工作方式取决于您的住所。如果您居住在美国,不同的州有不同的要求,并且某些地区的某些地区也可能有。通常,人口稠密的区域需要进行更严格的检查,以控制当地的空气污染。测试的更宽松形式需要视觉检查以确保汽车应该拥有的发射控制设备已就位。然后,汽车通过诊断链接连接到州的计算机系统。车辆的诊断系统可以告诉检查计算机是否一切正常。如果汽车有任何存储的故障代码,或者最近清除了代码,以至于汽车的主动测试周期尚未运行,则汽车将使检查失败。实际上,更严格的过程涉及使用驱动力计和四个气体分析仪。在对排气进行采样和测试时,该汽车通过一系列加速度和减速。超过规定水平的HC,CO或NOX的任何过多都会导致汽车失败。 If you have any trouble getting your car past your local inspectors, contact Your Mechanic. They can send a technician to your home or office to [check out your car]https://www.万博体育入口yourmechanimanbetx体育手机c.com/services/tune-up)并告诉您您需要通过测试需要什么。

Hi there:

烟雾测试法规和程序根据您的车辆注册的特定州而有所不同。这也取决于您所在州的烟雾或注册检查是否需要进行基本的安全检查。但是,通常,烟雾检查旨在测量通过燃烧过程产生的一些有害气体。当氮氧化物(NOX)和碳氢化合物气体(HC)暴露于阳光时,会产生烟雾或颗粒物。在烟雾检查期间监测的五种气体是碳氢化合物(HC),一氧化碳(CO),氮氧化物(NOX),二氧化碳(CO2)和氧气(O2)。NOX是大多数人认为是从尾管出来的“烟雾”的。这些排放中的每一个都有不同的传递水平。该测试通常包括三个阶段,即启动测试,加速度测试和后加速度闲置检查。

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