Exhaust temperatures in {TAIL ~ emission control devices} may be directly controlled by an intake air throttle, fuel injection timing, and exhaust pressure when {HEAD ~ an emission control device} is placed between two variable geometry turbocharger exhaust turbines and coupled to a combustion engine 
Exhaust temperatures in { TAIL ~ emission control devices } may be directly controlled by an intake air throttle , fuel injection timing , and exhaust pressure when { HEAD ~ an emission control device } is placed between two variable geometry turbocharger exhaust turbines and coupled to a combustion engine
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH