LIQUID COOLED REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION SYSTEMS

摘要

A reductant delivery unit having active cooling which is constructed to have sufficient structural robustness, and to improve corrosion resistance of the assembly, where an attack on the base injector is conceivable with the use of incorrect coolant media. The reductant delivery unit has an upper shield, a lower shield connected to the upper shield, and an inner sleeve. The reductant delivery unit also includes a lower sleeve connected to the inner sleeve and the lower shield. A liquid cooling cavity is formed by the connection between the inner sleeve and the lower shield, the lower sleeve and the lower shield, and the lower sleeve and the inner sleeve. Coolant flows into the liquid cooling cavity to provide a cooling function to an injector partially located within the inner sleeve, and a corrugated portion of the lower sleeve transfers heat away from at least a portion of the injector.

主权项

1. An apparatus, comprising:
a reductant delivery unit, comprising:
a liquid cooling cavity;a lower sleeve, a portion of the lower sleeve forming part of the liquid cooling cavity; andan injector substantially surrounded by the liquid cooling cavity;wherein coolant is circulated into and out of the liquid cooling cavity to control the temperature of the injector.