![]() ![]() X is produced in high temperature mixtures of atmospheric nitrogen and oxygen that occur in the combustion cylinder, and this usually occurs at cylinder peak pressure. This dilutes the O 2 in the incoming air stream and provides gases inert to combustion to act as absorbents of combustion heat to reduce peak in-cylinder temperatures. ![]() EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. X) emissions reduction technique used in petrol/gasoline, diesel engines and some In internal combustion engines, exhaust gas recirculation ( EGR) is a nitrogen oxide ( NO EGR valve the top of box on top of the inlet manifold of a Saab H engine in a 1987 Saab 90 ![]()
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