AN INTERNAL COMBUSTION ENGINE SYSTEM AND A METHOD OF OPERATING AN INTERNAL COMBUSTION SYSTEM
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United States of America Patent
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Issued Date -
Jun 2, 2022
app pub date -
Mar 27, 2020
filing date -
Mar 27, 2020
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Abstract
Provided are a method and an ICE system, including an internal combustion engine including a first and a second set of cylinders. A first and a second EGR valve control flow of exhaust gas from the cylinders to an EGR conduit. A controller controls the closing of the second EGR valve, thereby preventing flow of exhaust gas from the second set of cylinders to the EGR conduit. The second EGR valve is upstream of a turbine. The controller is configured to activate a fuel injector for late post injection of fuel into the second set of cylinders when the second EGR valve is closed, so that at least a part of the fuel that exits the second set of cylinders is uncombusted. An exhaust gas aftertreatment system receives and treats exhaust gas which is not recirculated in the EGR conduit, and includes an oxidation catalyst for combustion.
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