Engine exhaust system
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United States of America Patent
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Jun 12, 2018
Issued Date -
N/A
app pub date -
Mar 8, 2016
filing date -
Mar 8, 2016
priority date (Note) -
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Abstract
Methods and systems are provided for flowing exhaust gas in an exhaust system of an engine. In one example, a method may include flowing a first portion of exhaust gas to a turbine, from the turbine to at least one aftertreatment device, then from the at least one aftertreatment device to atmosphere, and flowing a second portion of exhaust gas to the at least one aftertreatment device, bypassing the turbine, then from the aftertreatment device to atmosphere, during a second condition. The method may also include, during a second condition, flowing a third portion of exhaust gas to the at least one aftertreatment device, from the at least one aftertreatment device to the turbine, and then from the turbine to atmosphere, and flowing a fourth portion of exhaust gas to the at least one aftertreatment device, and then from the at least one aftertreatment device to atmosphere, bypassing the turbine.
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