What is the exhaust emission standard?

[DiMiranda]

Exhaust emission standards are set at 4%. Below is an introduction to the relevant content: 1. Establishment of standards: Automobile exhaust emission standards are quality requirements for harmful substances emitted by vehicles, such as carbon monoxide, hydrocarbons, nitrogen oxides, and particulate matter, aimed at reducing the production of harmful gases and encouraging automobile manufacturers to improve their technologies. Both Europe and the United States have established relevant standards, with Mainland China primarily referencing European standards. 2. Air pollution: Automobile exhaust is another major factor in air pollution. It contains carbon monoxide, nitrogen oxides, and other solid particles that adversely affect human health, especially leaded gasoline, which poses even greater harm to humans. Different vehicles also emit different odors. Automotive repair experts note that normal exhaust should be colorless and odorless, whereas exhaust of different colors and smells may indicate that the vehicle is experiencing some malfunctions.

[MacAmy]

I've been driving for almost twenty years. The tailpipe emission standards are mainly set by the government to control vehicle pollutants. For example, all new vehicles now must comply with the China VI standard, which stipulates that carbon monoxide emissions must be below 0.5 grams per kilometer and hydrocarbons no more than 0.05 grams. These numbers sound quite small, don't they? Automakers have to ensure compliance during design and testing, otherwise the vehicles can't be sold. When I take my car for maintenance at the repair shop, the mechanics often emphasize the importance of the catalytic converter—it converts harmful substances in the exhaust into harmless ones, keeping emissions within limits. During annual inspections, the environmental department plugs in equipment to check the exhaust. If it doesn't meet the standards, the car can't be driven and requires repairs. I think as technology advances, the standards are getting stricter, pushing for cleaner engines and fresher air. But car owners also need to pay more attention to vehicle maintenance to avoid emission issues affecting driving safety. After all, everyone wants to breathe smoothly while driving.

[JustinLynn]

As someone deeply concerned about the environment, emission standards are key regulations for reducing pollution. They limit the amount of harmful gases vehicles can emit, such as carbon monoxide, hydrocarbons, and particulate matter. Current mainstream standards like China's National VI requirements are much stricter than the older National V, especially in urban areas. The direct benefit is improved air quality, reduced smog, and fewer respiratory diseases. Governments promote green technology development by car manufacturers through regular standard upgrades, such as more efficient filtration systems. When choosing a car, I prioritize the emission label and opt for low-emission models, which not only save money but also protect the planet. In daily driving, paying attention to idling time and maintenance intervals helps avoid exceeding emission limits. Simple actions can make cities more livable, and everyone should participate in the effort for cleaner air.

[DelMaddox]

I've been driving for seven or eight years, and the tailpipe emission standards directly affect whether a vehicle can be on the road and pass annual inspections. For example, the current China VI standard imposes strict limits on new vehicles' tailpipe emissions, requiring pollutants to be controlled below specific levels. When buying a car, salespeople always emphasize emission compliance, otherwise, the vehicle cannot be registered. My own car was purchased the year before last, and I worry about failing the emission test every annual inspection. The staff will use instruments to measure CO and HC levels, and if they exceed the limits, it's troublesome—you have to repair the catalytic converter or replace parts. I've learned that regularly changing the engine oil and checking the exhaust pipe can prevent emission issues, prolong the car's lifespan, and save both worry and money.