The SCR exhaust after-treatment of the diesel engine is effective in controlling emissions of carbon monoxide (CO), hydrocarbons (HC) and particles (PM) in the exhaust gas to meeting the requirements of the regulations. Then the high content of nitrogen oxides (NOX) in the exhaust exhaust of the engine is treated by a special on-board aftertreatment system. At present, a variety of diesel exh...
(1) Urea content: The AdBlue® content directly affects the catalytic efficiency of NOx and the freezing point of the AdBlue®. In the SCR reduction system, the concentration of urea solution is one of the key factors. Too high or too low concentration can not improve the conversion efficiency of NOx, but also cause the slip of ammonia (due to the excessive NHs/NOx ratio) then forming second...
Nowadays, heavy diesel trucks come with the most current EPA compliant equipment. This equipment comes in the form of two different methods used in the after treatment of the exhaust emissions. These methods are Selective Catalytic Reduction (SCR) and Exhaust Gas Recirculation (EGR). Either are used to reduce NOx. In the early days, most trucks had only an EGR system with a diesel particulate filt...
It depends on many factors, includes the diesel engine size, driver, DEF system condition, presence of NOx in the exhaust stream. Typically, manufacturers refer to DEF consumption as a percentage or fuel consumption. This can vary from as low as 2% to as high as 10%. So if your engine consumes 100 gallons of fuel, for a 10% DEF consumption, it would have used 10 gallons of diesel exhaust fluid def...
China is one of the world's largest automobile production countries. In 2018, China's auto production and sales of 27.809 million and 28.881 million cars, of which heavy diesel vehicles accounted for about 18% of the production and sales. Heavy-duty diesel vehicles are the main source of pollutants emitted by motor vehicles. Therefore, the existence of a large number of heavy-duty diesel vehicles ...
EDI (Electrodeionization), also known as continuous electro-desalination technology, scientifically integrates electrodialysis technology and ion exchange technology. Through Selective permeation of cations and anions by cation and anion membranes and the exchange effect of ion exchange resin on ions in water.The directional migration of ions in water is realized under the action of electric ...
The white precipitate in AdBlue® usually appear in winter. The AdBlue® in urea tank melt after freezing, white sediment will appear at the bottom, so the low temperature is one of the conditions for the formation of sediment. Through the professional detection of AdBlue® with precipitate after melting, the test result shows that the main component of the white precipitate is triuret, t...
In general, some people will reduce the cost of purchasing AdBlue by shielding it . It is common to change the signal to deceive the driving computer by brushing the ECU or adding an emulator to the vehicle, so as to reduce the injection of AdBlue. Another cheaper way is to add a screw to the rear processor's sensor to enable the country's four vehicles to have less or no injection of AdBlue . It ...
There are three reasons for the blockage of urea crystallization in AdBlue® production machine. Here are three main reasons for the blockage ; I. Atomization effect or failure of the nozzle SCR system can be divided into two types: air-free type and air-assisted type. Generally, the working pressure of air-assisted urea injection is relatively high, so it may occur that the nozzle valve needle...
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