REDUCTANT DOSING SYSTEM HAVING ANTI-AERATION DEVICE

摘要

A reductant dosing system (10) for a machine (5) having an engine (306) and an exhaust system (12) is disclosed. The reductant dosing system has a tank (35) configured to hold a reductant, a dosing arrangement (20), and a supply passage (42) connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement (25) configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve (200) configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank.