What does the customer get when using AdBlue?

What does the customer get when using AdBlue?

The urea solution AdBlue is used as an additional working fluid in diesel engines equipped with SCR and meeting environmental standards. The operating principle of the system is a chemical reaction involving ammonia and nitric oxide, resulting in the conversion of harmful compounds into absolutely safe water vapour and nitrogen.

Main features of AdBlue

AdBlue is harmless to the human body. It is a colourless solution of urea in demineralised water. Urea is used as a consumable working fluid in modern diesel vehicles equipped with an SRC neutralization system, as a reagent that reduces the harmfulness of exhaust gases.

The system is quite complex and consists of several components:

• a tank in which a supply of urea is stored, which is topped up when the vehicle
  is refuelled. The neck shall be removed by means of measures which exclude
  as far as possible the filling of diesel fuel into it;
• an AdBlue injection control unit;
• a pump which pressurises the solution at the exhaust injection valve upstream
  of the SCR catalyst;
• nitric oxide sensors before and after the catalyst;
• a return line for draining the excess from the dispenser with a valve;
• temperature sensors in the tank and injection line;
• exhaust gas temperature sensor;
• urea level sensor in the tank;
• filters on the solution fed to the dispenser;
• sensors and valves for regulating the temperature of the circulating fluid; SCR
  catalyst.

The composition includes two control loops - on the amount of injected solution and its temperature. The system components can be heated by fluid from the enginecooling system, which is monitored by appropriate sensors and the control unit. It is impossible to allow a large change in the temperature of AdBlue, especially its freezing.

What are the advantages of using AdBlue?

Tsaki presents a number of advantages of AdBlue that one has when using it:

• harmlessness to humans and animals;
• non-flammability;
• non-toxicity;
• no risk of explosion;
• safety for the environment;
• economical consumption;
• resistance to low temperatures;
• convenient storage conditions;
• reduction of fuel consumption.

Let's take a closer look at some of the points.

Let's start with the fact that the production process of the AdBlue urea solution is strictly regulated and subject to strict control by specialists. The conditions under which the production process must take place are determined by two standards at once. The finished product undergoes the most stringent tests during which its compliance with international quality and safety standards is determined.

The next point is resistance to low temperatures and freezing. The optimum storage  temperature for the reagent is in the range -11 to +25 °C. At temperatures below -11°C the AdBlue liquid crystallises and does not lose its properties when thawed. Importantly, the solution can be stored in a tank - it will not burst when the liquid freezes for long periods.

AdBlue has been specifically developed for use in SCR system catalysts. You should not use other "similar" products: this can cause temperature disturbance, even system failure. Trucks of the latest generations are equipped with sensors that read the amount of reagent and if it runs out, there is an automatic transition to engine power limitation.