The exhaust system may also include a controller configured to selectively control an amount of {HEAD ~ fuel} injected by each of the plurality of dosers based on {TAIL ~ a velocity} of the exhaust adjacent to each doser 
The exhaust system may also include a controller configured to selectively control an amount of { HEAD ~ fuel } injected by each of the plurality of dosers based on { TAIL ~ a velocity } of the exhaust adjacent to each doser
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH