EGR

EGR systems (Exhaust Gas Recirculation / Emission Gas Recirculation) are used since the 70s to reduce the emission of harmful NOx (nitrogen oxide) from both ignition engines (petrol, LPG, ethanol) and auto-ignition engines (diesel).

These systems direct a portion of the exhaust gases into the combustion chamber(s), hereby reducing the oxygen levels. This lowers the combustion temperature, having a beneficial effect on NOx emission, which is primarily formed at high combustion temperatures.

The advantages of a modern EGR system

• Lower combustion temperature: less NOx
• Higher pressure in the inlet channel: improved filling of the combustion chamber
• Engine operating temperature is reached faster and maintained better

Potential disadvantages of EGR application

• Power loss
• Contamination of the inlet channel
• Increase in fuel consumption

Symptoms of a malfunctioning EGR system

• Engine doesn't run smoothly and holds back
• Air intake flow significantly reduced
• Faulty EGR valve: power loss at full load, poor hot start and troubled idling
• Higher maintenance costs due to (secondary) defects and contamination
• Clogged and ultimately defect Diesel Particulate Filters (DPF)
• Problems with the swirl valves (diesel engines)

Commonly applied solutions

• Cleaning the EGR system
• Replace parts (Often costly and it can't be guaranteed that the problems won't reoccur)
• Disable and/or remove the EGR system (Adjust software/engine-electronics, combined with hardware removal as needed)
• Combination (s) of the above

KCPerformance can troubleshoot EGR-systems for you. This starts with precise diagnostics; We are equipped with the tools to read error-codes from all brands, supplemented by our extensive practical experience.