EGR valve on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline and diesel engines.EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders.GR valve on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline and diesel engines.
â¢ FALL OUT (verb) The verb FALL OUT has 5 senses: 1. have a breach in relations. 2. come as a logical consequence; follow logically. 3. come off. 4. leave (a barracks) in order to take a place in a military formation, or leave a military formation. 5. come to pass. Familiarity information: FALL OUT used as a verb is common.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: fall, autumn(noun) the season when the leaves fall from the trees. in the fall of 1973. spill, tumble, fall(noun) a sudden drop from an upright position. he had a nasty spill on the ice. Fall(noun) the lapse of mankind into sinfulness because of the sin of Adam and Eve.