How Far and High Does Vehicle Exhaust Diffuse?

[DelJason]

Vehicle exhaust suspension height is determined by atmospheric pressure and monsoon winds. In Shanghai, the suspension height of exhaust is approximately within a 10-meter range, while in Lanzhou, it reaches 21.4 meters. Calculating based on each floor being 3 meters in height (frame 2.8 meters, floor slab 0.2 meters), this means that under windless and clear conditions, vehicle exhaust in Shanghai theoretically suspends at the height of a 4-story building, whereas in the high-altitude northwest city of Lanzhou, the theoretical suspension height is equivalent to an 8-story building. Below is extended information on factors affecting excessive exhaust emissions: 1. Poor gasoline quality: Inferior gasoline quality may lead to excessive vehicle exhaust emissions. 2. Malfunctioning exhaust gas recirculation system: When the exhaust gas recirculation system fails to operate properly, faulty input signal sensors can cause the air-fuel mixture to become too lean. 3. Inaccurate ignition timing: Misfires or insufficient ignition energy in the ignition system result in incomplete combustion of the air-fuel mixture. 4. Low cylinder pressure: An excessively high engine operating temperature; observe whether the engine temperature on the diagnostic tool is too high.