Exhaust gas recirculation (EGR) system and Power System

A two stage cooled EGR system for a turbocharged internal combustion engine (10) with an intake air charge air cooler (32, 32'). The first EGR cooler (50) is a liquid-to-air cooler and the second, low temperature EGR cooler (58, 58'), is an air-to-air cooler combining with the gas flow dow...

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Bibliographic Details
Main Authors LOHMANN, CRAIG WILLIAM, SHEIDLER, ALAN D
Format Patent
LanguageEnglish
French
German
Published 17.08.2011
Subjects
BLASTING
COMBUSTION ENGINES
COMBUSTION ENGINES IN GENERAL
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INTERNAL-COMBUSTION PISTON ENGINES
LIGHTING
MECHANICAL ENGINEERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
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Summary:A two stage cooled EGR system for a turbocharged internal combustion engine (10) with an intake air charge air cooler (32, 32'). The first EGR cooler (50) is a liquid-to-air cooler and the second, low temperature EGR cooler (58, 58'), is an air-to-air cooler combining with the gas flow downstream of the intake air cooler (32, 32'). The system bypasses EGR flow through the low temperature EGR cooler (58, 58') during certain engine conditions such as low engine coolant temperature and a check valve (54) allows a limited portion of uncooled, pressurized intake air to be passed through the low temperature EGR cooler (58, 58') for scavenging of any residual moisture and ultimate consumption by the engine (10).
Bibliography:Application Number: EP20110152158