Patent ID: 9617884
Date: 2017-04-11
CPC Classifications: F01N,Y02A,Y02T

Claim:
1. A liquid cooled reduction unit, the unit comprising: a diesel exhaust fluid (DEF) injection valve, the valve having an end portion extending to a distal end, the valve configured to receive a DEF and force the DEF to exit at the distal end, the DEF then being directed and applied to an exhaust stream of a vehicle engine; and a coolant jacket selectively filled with a coolant, the coolant jacket having an outer side and an inner side, the inner side of the jacket facing a length of the end portion and being separated from the length of the end portion by an air gap, the air gap being closed at or near the distal end of the valve such that the air gap is not in fluid communication with a DEF fluid exit path of the valve.