What are the exhaust emission testing data standards?
2 Answers
Automotive environmental exhaust emission testing standards set the limit for carbon monoxide at 6.3g/km, and the total limit for hydrocarbons and nitrogen oxides at 2.0g/km. Below are the specific details about exhaust emission testing: 1. Testing Basis: Automotive exhaust emission testing is based on whether the smoke opacity value meets the standards, and whether emissions meet the standards is primarily determined by vehicle testing data, confirming compliance based on the smoke opacity value. 2. Inspection Authorities: Motor vehicle exhaust inspections are conducted jointly by the environmental protection administrative departments and public security traffic management departments for law enforcement checks. Traffic police officers are responsible for directing, intercepting vehicles, and handling vehicles that exceed standards, while environmental protection personnel are responsible for monitoring. Law enforcement officers explain the situation to the parties on the spot. 3. Standard Values: Depending on the vehicle type, total vehicle mass, year of manufacture, and fuel type, the standard values vary.
The exhaust emission testing standards mainly focus on the numerical limits of several pollutants, including that carbon monoxide levels cannot be too high, and hydrocarbons must also be kept at low levels, otherwise it will exceed the standard. Regulations vary by region. For example, China currently implements the China VI standard, where the CO limit for gasoline vehicles is approximately 100 milligrams per kilometer. Diesel vehicles also need to consider particulate matter. The testing process involves measuring actual emissions with instruments at the vehicle management office, and if the numbers exceed the threshold, the vehicle will fail the annual inspection and require repairs. The purpose of the standards is to reduce air pollution, so regular vehicle maintenance is crucial, including checking the air filter and catalytic converter. Using cleaner fuels regularly can help avoid carbon buildup issues. Car owners who familiarize themselves with local regulations can avoid unnecessary trouble. I am always very careful with my old car during the annual inspection.
