exhaust gas recirculation valve III Modern exhaust gas re-circulation valve in which the valve and the vacuum unit are directly integrated in the induction pipe. Exhaust gas re-circulation is increasingly being used nowadays in petrol engines. description ordernumber 1257 see also: Mercedes-Benz A Class diesel engine with common rail technique nozzle holder with two-spring injection nozzle function model crankshaft Diesel engine of a VW Golf with transmission