ANTI-CLOGGING DEVICE FOR DIESEL EXHAUST FLUID SUPPLY

摘要

An apparatus for supplying Diesel Exhaust Fluid to an engine exhaust gas treatment system includes a reservoir to collect trapped air if the dosing module is clogged with crystalized urea. The reservoir is placed at the dosing valve inlet on a T-connection. The reservoir provides a closed chamber to receive trapped air in the DEF supply line, allowing DEF to flow to the dosing module. When DEF contacts the crystallized urea causing the clog, the urea dissolves, freeing the injector so that normal action of the dosing module is restored.

主权项

1. An apparatus for delivering aqueous urea fluid into an exhaust gas system of a combustion engine, comprising:
a dosing module mountable on an engine exhaust conduit and configured to deliver aqueous urea fluid to the exhaust conduit; a feed line connected to carry aqueous urea fluid to an inlet of the dosing module; and, a reservoir for collecting air trapped in the feed line connected to the feed line at the inlet of the dosing module, wherein the feed line includes a branch at the inlet of the dosing module, the reservoir connected to the branch.