What causes excessive NO emissions in exhaust?
2 Answers
The reasons for excessive NO emissions in exhaust include incomplete combustion in the engine combustion chamber, accumulation of large amounts of carbon deposits in the intake system and engine combustion chamber, and excessively high combustion chamber temperatures leading to emission exceedance. Below are specific solutions to address excessive emissions: 1. Use carburetor cleaner: It can dissolve the gum solidified on the surfaces of various carburetor components. Timely cleaning makes it relatively easy to remove. Currently, there are two types of carburetor cleaners on the market: domestic ones are cheaper but less efficient, while imported ones are more expensive but more efficient. 2. Remove dust: Take out the paper filter element of the air filter and knock off the dust on its surface or blow it clean with compressed air.
There are many reasons for excessive NO emissions in exhaust. After years of repairing cars, I've seen it all. The most common issue is the aging or clogging of the catalytic converter. When this part fails, nitrogen oxides cannot be effectively converted. Poor engine combustion is another major cause. An imbalanced air-fuel ratio can lead to excessively high combustion temperatures, producing more nitrogen oxides. Additionally, a faulty oxygen sensor can send incorrect data to the computer, making it unable to control the fuel injection ratio properly. Improper ignition timing and severely worn spark plugs can also affect combustion efficiency. Poor maintenance, such as not changing the oil filter for a long time, can cause carbon buildup inside the engine, further worsening emissions. It is recommended that car owners regularly perform exhaust emission tests and fix any issues early to avoid being stopped and fined by the police on the road.
