SCR system and method for its purge

The system has a pump (6) for conveying an additive from a container (1) to an injector (3) via an injection channel (2). A purging device (5) comprises a chamber and a movable piston that is slidably mounted in the chamber. The purging device is designed such that a movement of the piston in a slid...

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Bibliographic Details
Main Authors LEONARD, STEPHANE, DHAUSSY, FRANCK, JANNOT, FRÉDÉRIC
Format Patent
LanguageEnglish
French
German
Published 21.10.2015
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
WEAPONS
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Summary:The system has a pump (6) for conveying an additive from a container (1) to an injector (3) via an injection channel (2). A purging device (5) comprises a chamber and a movable piston that is slidably mounted in the chamber. The purging device is designed such that a movement of the piston in a sliding movement direction causes opening of the chamber for passage of the additive towards the injection channel, and the movement of the piston in another sliding movement direction creates a vacuum within the chamber to increase a part of the additive contained in the injection channel. The pump is designed as a one-way pump. An independent claim is also included for a method for storage and injection of an additive in an exhaust pipe of an internal combustion engine.
Bibliography:Application Number: EP20130194064