scr-system-diesel

What is the SCR system for on diesel cars ?

The new European standard Euro VI which entered into force in September 2015 ultimately forces all manufacturers to adopt selective catalytic reduction SCR technology to deliver lower gas emissions on their diesel models.

SCR is the best-performing technology on the market to reduce NOx (nitrogen oxides), which explains why it has been massively adopted by European manufacturers. Its operating principle consists of an exhaust treatment system downstream of the engine feeding AdBlue® into the system.  This system is often used with a particule filter (DPF).

What is SCR made of ?

The use of this technology involves the installation of several elements: a tank equipped with an electric pump, a heating device, several sensors, a control unit and a SCR catalyst.

How does the SCR system maintenance work ?

All these together must be maintained periodically to function properly.

The maintenance of the SCR system for normal use is carried out during the annual review at the dealership. During each maintenance, the sensors, the catalyst and the AdBlue® tank are checked.  It is also necessary to drain the AdBlue® tank and check it for tightness at the same time.

The embedded system that controls the dispenser of AdBlue® could be updated out during the maintenance to meet possible evolutions of the European standard euro VI.

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