APPARATUS, METHOD, AND SYSTEM FOR REDUCTANT FILTRATION

摘要

An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system with a reductant tank. A filter module positioned in the reductant tank filters reductant before it is conveyed to the reductant pump to remove impurities. In order to reduce gas flow to the pump, the filter module may have an outlet port leading to the reductant pump and a venting port positioned above the outlet port such that gas bubbles float to the venting port prior to entry of the reductant into the outlet port. The filter module may be secured to a tank level sensor assembly, and may vent the gas to a gas reservoir above the reductant in the reductant tank. Such a filtration system may operate independently of any return line that conveys reductant back to the reductant tank.

主权项

1. A reductant filter for a reductant delivery system, comprising:
a housing; a filter medium within the housing; a reductant inlet port in reductant providing communication with the filter medium, wherein the inlet port is positioned to draw reductant from a reductant source in which the housing is at least partially immersed; and a reductant outlet port in reductant receiving communication with the filter medium; and a gas venting port in gas receiving communication with the filter medium, the gas venting portion being positioned proximate a top of the filter medium.