Other SCR system Components such as SCR control unit, NOx sensors, AdBlue pressure sensor, temperature sensor and others are there to control and monitor the system, ensuring that every component is operates correctly.įor SCR system to work properly, the fluid temperature must be at least at 220C, power consumption 20% and the RPM of at least 1000. This mix will then go into the catalytic converter which in turn creates a chemical reaction where emissions are divided into nitrogen and water. When gases reaches a certain point, adblue fluid is sprayed in, which separates nox into ammonia and carbon oxide.

The vehicle outputs emissions, including nox, these are then filtered by DPF filter to remove any access amounts of soot. The main components of the SCR system are the catalytic converter and the injection pump. The process is reasonably simple to understand. SCR system needs to be supplied with AdBlue fluid, which is a simple, non-toxic solution made with about 32.5% synthetic urea and 67.5% deionised water.

Gases are broken down into various chemicals within the exhaust fumes into mostly water and nitrogen, which are much cleaner and better for the environment. SCR system is used in heavy goods vehicles to reduce the amount of exhaust emissions.