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Filtering device for use in reducing agent suction device to filter solution of highly pure urea in combustion engine for post-treatment of nitrogen oxide in catalytic converter, has helical suction tube arranged in suction element
Filtering device for use in reducing agent suction device to filter solution of highly pure urea in combustion engine for post-treatment of nitrogen oxide in catalytic converter, has helical suction tube arranged in suction element
The device (1) has a suction element (3) arranged in a direction of flow before a filter (6), where the suction element, by which fluid is more supplied to the filter. A helical suction tube (4) is arranged in the suction element. Radius and/or pitch of the helix over length of the helical suction tube is variable or constant, where the helical suction tube comprises round or oval inner cross-section. The inner cross-section is constant over the length of the helical suction tube. The filter and the helical suction tube are formed by a helical filter element. An independent claim is also included for a suction device comprising a conveying device.
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