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: balancing model for crankshafts in-line pump with RSF flyweight governor Electric turbocharger (e-booster) SCR catalytic converter with AdBlue injection