The urea pump is an important part of the urea solution injection metering system. Its main function is to extract the urea solution in the urea tank, maintain a certain pressure, and then deliver it to the injection unit to meet the flow and pressure requirements of the injection metering system.

The main function of the urea pump filter element is to provide a clean urea solution for the post-processing system. It can effectively filter impurities in the urea solution, adsorb and remove harmful suspended solids in the urea solution, avoid blocking the urea nozzle, and reduce the early stage of the nozzle and parts. Damaged, prolong the service life of post-processing.

The functional principle of the metering unit (metering module): a urea flow of a certain pressure is supplied by the urea pump, sensed by the temperature and pressure sensor, and calculated and driven by the controller, the metering valve is opened at a certain frequency and pulse width, and the The command flow rate is precisely injected into the exhaust pipe and mixed with the engine exhaust. Under the action of the catalyst, a catalytic reduction reaction is produced to reduce the concentration of nitrogen oxides.

Function of urea nozzle: it is used to treat the quantitative injection of AdBlue a after exhaust and reduce NOx emission.

The urea and air mixture sent by the metering urea pump is sprayed into the exhaust pipe through the jet hole of the nozzle, so that the urea is atomized evenly.