How harmful the vehicle exhaust

We all know that the vehicle in the process of driving is going to emit some exhaust gas, this exhaust gas is usually in the normal range. When the emissions exceed the standard, it will bring a lot of harm, so what are the reasons the car emissions exceed the standard?

First of all, the exhaust gas exceeding the standard is not necessarily three-way catalytic converter poisoning, oxygen sensor damage is also an important and easily overlooked reason, in the use of three-way catalytic converter to reduce exhaust pollution on the engine, oxygen sensor is an essential component. As the air-fuel ratio of the mixture once deviated from the theoretical air combustion ratio, the three-way catalyst to CO, HC, and NOx purification capacity will be sharply reduced, so the oxygen sensor is installed in the exhaust pipe to detect the concentration of oxygen in the exhaust and send a feedback signal to the ECU, and then the ECU controls the increase or decrease of the injector injection so that the air-fuel ratio of the mixture is controlled near the theoretical value.

Secondly, a simple check can be done, the engine is the heart of the car, check whether the engine is normal, take off the spark plug to see if there is oil, It very clean that the ignition is normal, and the engine does not string oil, increase the throttle when the observation, whether the operation is smooth and strong if the above check is no normal problem.

It is worth mentioning that the three-way catalytic converter poisoning is the most important reason for the car exhaust gas exceeding the standard, The three-way catalytic converter, installed in the car exhaust system is the most important external purification device.

It can be car exhaust emissions of CO, HC NOx, and other harmful gases through the oxidation and reduction effect into harmless carbon dioxide, water, and nitrogen. Since this catalytic converter can simultaneously convert the main harmful substances in the exhaust gas into harmless substances, it is called three-way.