EGR TUBE

Used for ducting exhaust gas by way of an exhaust gas recirculation (EGR) valve back to the intake manifold thus reducing the level of toxic emissions.Makes assembly to the engine easier and absorbs thermal and vibrational stresses in the EGR system.

Design solution for thermal expansion
Cleaner -burning petrol and diesel engines are being developed with lightweight cast-aluminum cylinder heads and aluminum or plastic manifolds. The very hot exhaust gasrecirculation (EGR) stream must be ducted externally to prevent heat damage to these critical aluminum alloy and plastic engine components.

The application challenge
The typical external (EGR)tube is mounted between the exhaust manifold(or crossover pipe) and the EGR control valve with a second tube routing can from the valve to the inside manifold .Because the gas temperature gas exceed 900⁰C(1650⁰F) ,the resulting thermal loads on the components can cause early valve, tube, or manifold failure . In addition , short rigid pipes can be almost impossible to install due to engine tolerance stack-up between the manifolds and the EGR valve.