EGR valve: Function and maintenance

What is it?

EGR Valve : Exhaust Gas Recirculation.

The EGR valve was invented in the United States in the 1970s. Tested for the first time by the American giant, General Motors, it reduces toxic gas emissions by re-using 5% to 35% of the exhaust gases. European anti-pollution standards made it mandatory in diesel vehicles.

How does that work?

When a diesel engine is at a low RPM, or idling, part of the burnt-off exhaust gases is emitted into the atmosphere. To comply with European anti-pollution standards, vehicle manufacturers needed to install a valve allowing the redirection of these gases towards the injection, so that they could be burnt a second time. This device, as well as being ingenious, has one enormous drawback: it clogs the injection system, in some cases causing complete obstruction of the EGR valve.

If the valve of a blocked valve remains in the closed position, your vehicle still carries on working normally. On the other hand, it is polluting more. In contrast, a permanently open valve risks damaging your intake system severely.

Which is why maintaining your EGR valve is of prime importance!

What are the recurring problems with an EGR valve?

Maintenance of your EGR valve

How to clean your EGR valve without disassembling it, without chemicals and in an efficient manner? We have the solution!

Thanks to de-scaling by FlexFuel hydrogen injection, which removes the scale, or carbon, present in your engine.

De-scaling by hydrogen is produced by an improvement to a natural phenomenon, which is the enrichment of the air-fuel mixture in your combustion engine. This procedure is efficient and non- aggressive, as it introduces no chemical or corrosive products into your engine. The carbon simply dissolves inside the engine and is removed naturally with the exhaust gases, where it is collected by a special filter.

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