What are the 2021 exhaust emission testing standards?
4 Answers
Implemented according to the China VI standard. The vehicle exhaust emission testing system has the following 4 characteristics: 1. Intuitive and simple operation: The measurement process can be controlled simply by using a barcode scanner, and all data can be displayed graphically on the screen; 2. Precise control of the testing process: The system can set time parameters for each stage of the testing process, with options to print, upload data, or calibrate data; 3. Clear and straightforward retrieval and query: The system provides multiple retrieval and query methods, allowing detailed inquiries into historical records; 4. Short measurement time: While complying with measurement regulations, it significantly reduces measurement time, improves production efficiency, with a maximum speed of 30 seconds per vehicle, and supports online operation and data upload.
I still remember during the 2021 vehicle inspection, the exhaust emission tests suddenly became stricter. That was when the China VI emission standard was implemented nationwide, mainly the China VI-b phase, requiring both new and old vehicles to meet the new limits. For example, carbon monoxide emissions couldn't exceed 700 milligrams per kilometer, and nitrogen oxides also had to be reduced, otherwise the inspection would fail. When I took my old car for inspection, if the engine had cold start issues or the catalytic converter was clogged with carbon deposits, the emissions would exceed the limits significantly. The mechanic said this was to reduce smog and improve air quality for everyone's health. He advised car owners to do minor maintenance in advance, such as using higher-grade fuel and cleaning the filters, rather than waiting until the inspection day to panic. Also, avoid aggressive acceleration during daily driving—gentle driving reduces pollutant emissions and is better for the car.
My experience as a full-time auto mechanic has taught me that the 2021 emission standards underwent significant upgrades, implementing the China 6b regulations. The testing stations now use more precise instruments, focusing on monitoring values like carbon monoxide, hydrocarbons, and nitrogen oxides. Common issues such as aged catalytic converters or clogged fuel systems will immediately fail the test when black smoke appears from the exhaust. My advice to customers is not to neglect regular maintenance—changing engine oil and air filters periodically can prevent major repairs. Before testing, let the engine idle for a while to cool down before measurements; don't queue up right after highway driving. Although the standards are stricter now, environmental improvements are evident. If your vehicle is in poor condition, get it fixed promptly—don't let minor issues escalate into costly major repairs.
I think the 2021 emission standards mark a significant environmental progress, with the implementation of China VI B effectively reducing pollution levels. The lower limits, such as the substantial decrease in particulate matter from diesel vehicles, can help alleviate urban air quality issues. During inspections, it's important to pay attention to vehicle health and not overlook minor issues that could lead to exceeding standards. Opting for public transportation or cycling also contributes to the effort, reducing exhaust emissions for fresher air to breathe.
