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　The diesel engine of Baotou beiben heavy truck accessories manufacturer adopts an external system, that is, there is a pipe connecting the exhaust pipe and the intake pipe, and a valve is installed in the pipe to control the entry of exhaust gas. Therefore, as the core part of the whole system, how to control and monitor EGR valve is the development direction of EGR system.

EGR: the full name is exhaust gas recirculation. After combustion, the internal combustion engine separates part of the exhaust gas, and Baotou beiben heavy truck accessories then enter the intake side for re combustion (technique or method). Its main goal is to reduce nitrogen oxides (NOx) in emissions and fuel consumption during partial load sharing.

Exhaust gas recirculation (EGR) is to return a small part of the exhaust gas produced by diesel engine or gasoline engine to the cylinder.

The combustion process of regenerative tail gas is delayed due to inertia, that is, the combustion speed slows down, resulting in a slower pressure formation process in the combustion chamber, which is the main reason for the reduction of nitrogen oxides.

In addition, increasing the exhaust gas recirculation rate will reduce the total exhaust emissions (massflow), thereby reducing the total emissions of pollutants in the exhaust emissions.

Different working conditions of internal combustion engines have different requirements for EGR quantity. In order to make the EGR system operate effectively, it is necessary to limit the exhaust gas participating in EGR.

When the load increases, the amount of EGR also increases, reaching the standard value;

Under no-load and no-load conditions, the emission of NOx is very small. In order to ensure normal combustion, EGR is not required;

During the heating process, the engine temperature is low and the NOx emission concentration is low. In order to prevent EGR from deteriorating the combustion process, EGR is not carried out;

At high load, high speed or full open, EGR is not required to ensure the dynamic performance of the engine;

During acceleration, EGR plays the role of transition stage, ensuring the acceleration and necessary purification effect of Baotou beiben heavy truck accessory vehicle.

The task of EGR system is to make the amount of exhaust gas recirculation reach the state at all working points, so that the combustion process is always in the state and ensure the low content of pollutants in emissions.

Because changes in the amount of exhaust gas recirculation may have diametrically opposite effects on the composition of various pollutants, the so-called state is often a compromise plan to make the total emission of relevant pollutants reach a good plan.

Although improving the exhaust gas recirculation rate has a positive effect on reducing the emission of nitrogen oxides (NOx), it will also have a negative impact on the increase of particulate matter and other pollution components.

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