In the diesel vehicle exhaust treatment system, the adblue pump plays a crucial role. It precisely sprays the urea solution (AdBlue) into the exhaust to enable the selective catalytic reduction (SCR) reaction, thereby reducing nitrogen oxide (NOx) emissions. Below, we will introduce in detail the working principle, classification and development.
The working principle of the this pump mainly involves drawing the urea solution from the urea tank through a pressure system and spraying it into the exhaust pipe through a nozzle. When the exhaust temperature of the diesel vehicle engine reaches a certain condition, the urea solution decomposes into ammonia (NH₃). Ammonia reacts chemically with nitrogen oxides in the exhaust gas under the action of a catalyst to produce harmless nitrogen gas (N₂) and water (H₂O), thereby achieving the purpose of exhaust purification.
(1) Electric adblue pump
The electric adblue pump is currently a widely used type. It operates by being driven by an electric motor, the advantages of a compact structure, easy installation, and high control accuracy. It can adjust the spraying volume of the urea solution in real time according to the engine's operating conditions, ensuring the exhaust gas treatment effect. At the same time, the pump has high reliability and relatively low maintenance costs.
(2) Pneumatic adblue pump
The pneumatic adblue pump uses compressed air as the power source to drive the pump to operate.The advantages of good explosion-proof performance and suitability for harsh environments. It has been applied in some occasions with high safety requirements, such as in coal mines and petrochemical industries. However, the structure of this pump is relatively complex, the installation and maintenance costs are high, and the quality of compressed air also requires higher standards.
(1)Intelligence
With the continuous development of automotive electronic technology, the pumps are also moving towards an intelligent direction. Intelligent adblue pumps can monitor the concentration, temperature, pressure, etc. of the urea solution in real time through sensors, and automatically adjust the injection volume based on these parameters to achieve more precise exhaust treatment. At the same time, it can also communicate with the vehicle's ECU (Electronic Control Unit) to realize functions such as fault diagnosis and remote monitoring, improving the reliability and maintainability of the system.
(2)Efficiency Enhancement
In order to enhance the efficiency of exhaust gas treatment, It is evolving towards a more efficient direction. The efficient adopts advanced spraying technologies, such as high-pressure spraying and atomizing spraying, which can spray the urea solution more evenly and finely, thereby improving the efficiency of ammonia production and the reaction efficiency with nitrogen oxides. At the same time, the efficient pump can also reduce the consumption of urea solution and save the usage cost.
(3)Environmental Protection
Under the backdrop of increasingly strict environmental requirements, the pumps are also constantly striving for environmental friendliness. The environmentally friendly pumps adopt more environmentally friendly materials and manufacturing processes, reducing pollution to the environment. At the same time, the environmentally friendly pumps can also reduce the risk of crystallization and blockage of the urea solution, improving the reliability and stability of the system.
As a key component in the diesel vehicle exhaust treatment system, the performance and quality of the adblue pump directly affect the exhaust treatment effect and the operating cost of the vehicle. With the continuous advancement of technology, this pumps will continue to develop in the direction of intelligence, efficiency, and environmental friendliness, making greater contributions to the environmental protection cause of diesel vehicles.
