FILTER DEVICE FOR A DIESEL EXHAUST FLUID (DEF - DIESEL EXHAUST FLUID) IN AN EXHAUST GAS TREATMENT SYSTEM

摘要

The various embodiments of the present invention provide a filter device 110 for DEF in an exhaust aftertreatment system 100. The filter device 110 comprises at least two filters (120), a first filter 112 and a second filter 114, which are arranged in parallel between a supply end and a supply end. In one embodiment, the delivery end is a tank 106 or a container in which the DEF fluid is stored, and the delivery end is a delivery module 102 that includes at least one pump. Alternatively, the delivery end is the delivery module 102, which includes the at least one pump, and the delivery end is a metering injector / metering module 104. The filter device 110 improves the life of the replaceable filter (120) by approximately double that of conventional filters. The flow from the feed end is passed through a filter each using controllable valves.