Filter system and filtration method for fluid reservoirs

摘要

A fluid delivery system includes a fluid reservoir having an inlet screen and a main reservoir filter. The fluid reservoir is adapted to enclose a fluid therewithin and includes a reservoir body forming a reservoir volume that is fluidly connected to an inlet conduit, a supply conduit, and a return conduit. The inlet screen is disposed fluidly along the inlet conduit and adapted to filter a fluid provided to fill the reservoir through the inlet conduit. The main reservoir filter is disposed fluidly along the supply conduit and adapted to filter a fluid drawn from the reservoir volume and provided through the supply conduit to a pump.

主权项

1. A diesel exhaust fluid (DEF) reservoir for use with an exhaust after-treatment system of an internal combustion engine, the DEF reservoir comprising:
a reservoir body forming a reservoir volume and a header opening that is fluidly open to the reservoir volume; a header connected to the reservoir body and disposed to seal the header opening; a heater connected to the header and disposed within the reservoir volume and adapted to be immersed in the DEF; a DEF draw conduit connected to the header and extending through the header between a sump location, the sump location being within the reservoir volume and adjacent to the heater, and a DEF draw port disposed external to the reservoir body and fluidly connected to a DEF pump; a bag filter connected to the header, the bag filter completely enclosing the heater and the sump location of the DEF draw conduit within the reservoir volume such that, when DEF is drawn from the reservoir volume through the sump location, said DEF is first filtered by the bag filter; a secondary reservoir filter disposed within the bag filter and arranged to cover the DEF draw port at the sump location; and a fill opening screen disposed to cover a fill opening formed in the reservoir body.