Supplying arrangement for use in e.g. selective catalytic reduction catalyst for supplying liquid urea solution into exhaust gas from diesel engine in bus, has charge generator imparting surfaces such that drops are energized by surfaces

摘要

The arrangement (1) has a charge generator (10) imparting a liquid reducing agent with electric charge, where the agent is injected in form of a spray into a mixture channel (2) of a combustion engine or into exhaust gas in the channel. The generator imparts surfaces (11) of the channel with the electric charge such that the electrically charged liquid reducing agent drops are repelled by the surfaces. The generator imparts wall surfaces (8) of the channel with opposite polarity charge such that the drops are energized by the wall surfaces. An independent claim is also included for a method for supplying a liquid reducing agent such as urea, into exhaust gas from a combustion engine.