METHODS AND SYSTEMS FOR CATALYTICALLY TREATING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE USING SECONDARY AIR INJECTION, AND SECONDARY AIR PUMP FOR USE THEREIN

METHODS AND SYSTEMS FOR CATALYTICALLY TREATING EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE USING SECONDARY AIR INJECTION, AND SECONDARY AIR PUMP FOR USE THEREIN

In a turbocharged internal combustion engine (ICE) system, a catalytic treatment device receives exhaust gases from the ICE after they have passed through the turbocharger turbine. The system includes a secondary air pump (SAP) for injecting pressurized air into the exhaust gases ahead of the cataly...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Turecek, Daniel, Krejci, Pavel, Houst, Vit, Nejedly, Milan
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
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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Beschreibung
Zusammenfassung:In a turbocharged internal combustion engine (ICE) system, a catalytic treatment device receives exhaust gases from the ICE after they have passed through the turbocharger turbine. The system includes a secondary air pump (SAP) for injecting pressurized air into the exhaust gases ahead of the catalytic treatment device. The SAP is a single-stage centrifugal compressor that includes an air recirculation passage for causing a first portion of the air pressurized by the SAP to be continuously recirculated back to the inlet of the SAP, which is effective for heating the air in the volute of the SAP. A second portion of the pressurized air, having thereby been heated, is injected into the exhaust gases proceeding toward the catalytic treatment device.