A method of managing ammonia vapour

A method of managing vapours generated from an ammonia-containing reductant delivery system for an engine of a vehicle is disclosed. During at least a portion of engine-off conditions the method is operable to store ammonia containing vapours generated in the reductant delivery system 73 and, after...

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Bibliographic Details
Main Authors MICHIEL J VAN NIEUWSTADT, WILLIAM CHARLES RUONA, TIM WEBB, CHRISTOPHER OBERSKI, GIOVANNI CAVATAIO
Format Patent
LanguageEnglish
Published 19.03.2008
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
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
STEAM ENGINES
TRANSPORTING
WEAPONS
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Summary:A method of managing vapours generated from an ammonia-containing reductant delivery system for an engine of a vehicle is disclosed. During at least a portion of engine-off conditions the method is operable to store ammonia containing vapours generated in the reductant delivery system 73 and, after said storing and during at least a portion of engine operation, the method is operable to purge said stored ammonia into an exhaust 71 of the engine to react in an SCR catalyst in the exhaust flow. The ammonia containing vapours may be stored 230 by a sorbent, a catalyst sorbent including a zeolite, or a charcoal canister. The ammonia containing vapours may be generated in a tank 220 storing liquid reductant e.g. urea.
Bibliography:Application Number: GB20070016365