What is EGR?
Exhaust Gas Recirculation (EGR) is an efficient, cost-effective system for reducing nitrogen oxide (NOx). The high-pressure EGR loop collects exhaust gases at the cylinder head outlet and re-injects them into the engine air intake. The main benefit is that NOx is reduced at the source by limiting the quantities produced during the combustion process, rather than by post-treating the exhaust gases.
What is an EGR Exchanger?
An EGR exchanger, also known as an EGR cooler or EGR heat exchanger, cools exhaust gas prior to it being reintroduced into the engine. The EGR exchanger is installed in the EGR circuit and can be located upstream or downstream of the EGR valve.
By cooling the gas, the combustion temperature is reduced which also reduces the quantity of NOx particles as they are formed at high temperatures.
Valeo: an EGR leader
As a leader in the EGR field, Valeo has a complete range of competitive solutions based on high and low pressure architectures for petrol and diesel engines. With over 20 years of experience in developing EGR modules, Valeo covers all European emission standards from Euro2 to Euro6 and offers a 100% Original Equipment (O.E.) quality range covering 16 car manufacturers. High technology and performing materials are key for Valeo, the only supplier of full EGR systems that include EGR valves and heat exchangers.