Heavy-Duty Diesel Engines

Clean Construction USA

What are the EPA 2007 On-Road Emission Standards?

What Diesel Pollutants are Regulated by the EPA?

What Impact Can Soot Have on the Oil?

What is EGR?

Diesel -The Revolution Begins

MSHA Diesel Particulate Matter Rule Upheld

What is Retrofit?

No Escape from Diesel Exhaust

What is EGR?

Increased soot levels can cause sludge, and clog Exhaust gas recirculation or EGR is a system used to reduce emissions in many new diesel engines. The EGR device redirects some of the exhaust gases normally emitted by the vehicle back into the engine. These gases are cooled and then diverted through the intake manifold into the cylinders along with some filtered and turbocharged air from outside the vehicle. This blend of spent and unspent gases is used in the combustion process, resulting in lower peak-flame temperatures and the creation of fewer Nitrogen Oxides (NOx).

The combustion process takes place here. A mixture of recirculated exhaust gas, fresh air and fuel is used. The proportion of recirculated gas varies depending on whether the engine is at idle or at full load.