Abstract: A liquid cooled reduction unit includes a diesel exhaust fluid (DEF) injection valve. The valve includes an end portion extending to a distal end. The valve is configured to receive a DEF and force the DEF to exit at the distal end such that the DEF is then directed and applied to an exhaust stream of a vehicle engine. A coolant jacket is selectively filled with a coolant and has an outer side and an inner side. The inner side of the jacket faces a length of the end portion and is separated from the length of the end portion by an air gap.

Abstract: A fluid injector includes a body associated with an outlet of the injector. An inlet tube is coupled to the body and has an open end for receiving fluid to be injected. An inlet cup has an open end and covers the open end of the inlet tube and also covers a portion of the body. The injector includes sealing structure including a primary seal providing a seal between the inlet cup and the inlet tube, a secondary seal between the body and the inlet cup and constructed and arranged to prevent liquid that is external to the injector from entering an interior of the injector through the open end of the inlet cup, and a surface feature on the body or on the inlet cup constructed and arranged to compress a portion of the secondary seal between the inlet cup and the body.

Abstract: A liquid cooled reduction unit includes a diesel exhaust fluid (DEF) injection valve. The valve includes a housing that forms an elongated chamber therein. The valve configured to receive a DEF and force the DEF through the chamber to exit the chamber and the DEF is then being directed and applied to an exhaust stream of a vehicle engine. A coolant jacket is selectively filled with a coolant and has an outer side and an inner side. The inner side of the jacket faces a length of the valve body and is separated from the length of the valve body by an air gap.

Abstract: A fluid injector includes a body associated with an outlet of the injector. An inlet tube is coupled to the body and has an open end for receiving fluid to be injected. An inlet cup has an open end and covers the open end of the inlet tube and also covers a portion of the body. The injector includes sealing structure including a primary seal providing a seal between the inlet cup and the inlet tube, a secondary seal between the body and the inlet cup and constructed and arranged to prevent liquid that is external to the injector from entering an interior of the injector through the open end of the inlet cup, and a surface feature on the body or on the inlet cup constructed and arranged to compress a portion of the secondary seal between the inlet cup and the body.