What is the acceptable level of vehicle exhaust emissions?
3 Answers
Gasoline engines must meet emission standards of CO 2.30g/km and HC 0.2g/km, while large diesel engines should comply with CO 2.1g/kw·h and HC 0.66g/kw·h. Below are specific details about vehicle exhaust emissions: 1. Vehicle exhaust contains harmful particulate matter such as carbon monoxide and nitrogen oxides, with leaded gasoline posing greater health risks. Countries have implemented emission standards to control vehicle exhaust. 2. Exceeding emission limits will result in penalties. If a vehicle's pollutant emissions surpass standards and fail to rectify after ordered treatment, a fine of 200 yuan and 3 penalty points will be imposed.
I've been driving for over a decade, and passing the emissions test is quite important. During annual inspections, testing stations use equipment to measure emissions according to national standards. For example, under the current China VI standard, gasoline vehicles must have carbon monoxide levels below 1000 milligrams per kilometer, hydrocarbons below 100 milligrams, and nitrogen oxides must also be well controlled. If emissions exceed the limit, the most common issue is high emissions, which could be due to a faulty catalytic converter or excessive carbon buildup. In daily driving, using fuel from reputable gas stations and regular maintenance can prevent problems. I remember last year my car almost failed the test, but replacing the catalytic converter fixed it. Keeping emissions compliant isn't just about passing inspections—it also saves fuel and reduces pollution. I recommend avoiding prolonged idling and driving at higher speeds on city roads to help the engine burn cleaner, which naturally lowers emissions.
As an environmental enthusiast, I believe the key to passing exhaust emission tests is compliance with emission regulations. Standards vary for different vehicle models, with new cars typically meeting China VI levels, where CO limits are around 0.7 grams per kilometer, HC below 0.1 grams, and NOx controlled at approximately 0.06 grams. Amid global warming trends, these standards are becoming increasingly stringent, and reducing particulate emissions is crucial for urban air quality. If your car is aging, high exhaust emissions may cause it to fail inspections, with common causes including faulty oxygen sensors or fuel system leaks. To improve, it's advisable to choose energy-efficient models, use high-quality gasoline, and avoid frequent cold starts on short trips. Regularly visit authorized service centers for emission testing to ensure levels remain well below the limits—this not only protects the environment but also extends engine life.
