EGR EXTRACTION IMMEDIATELY DOWNSTREAM PRE-TURBO CATALYST

A turbocharged, diesel engine has a small catalyst provided upstream of the turbocharger with EGR collected from the exhaust stream downstream of the catalyst and upstream of the turbocharger. By making the catalyst small, it packages into a pipe coupling the manifold to the turbocharger, readily re...

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Bibliographic Details
Main Authors SEXTON PATRICK, STYLES DANIEL JOSEPH, OBERSKI CHRISTOPHER, COWLAND CHRISTOPHER
Format Patent
LanguageEnglish
Published 03.02.2011
Subjects
BLASTING
COMBUSTION ENGINES
COMBUSTION ENGINES IN GENERAL
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
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INTERNAL-COMBUSTION PISTON ENGINES
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
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Summary:A turbocharged, diesel engine has a small catalyst provided upstream of the turbocharger with EGR collected from the exhaust stream downstream of the catalyst and upstream of the turbocharger. By making the catalyst small, it packages into a pipe coupling the manifold to the turbocharger, readily reaches lightoff, and absorbs little exhaust energy, thereby providing acceptable conversion of hydrocarbons and CO, but still allowing fast turbocharger response. In one embodiment, the engine has two cylinder banks, two exhaust manifolds, and two pre-turbo catalysts installed upstream of the turbine.
Bibliography:Application Number: US20090512483