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US 11,754,007 B2Granted
Systems and methods for exhaust gas recirculation
AssigneeCummins Inc.
InventorsOlumayokun Ogunbekun, Sriram S. Popuri, Scott Robert Bardakjy, Avra Brahma, Yongsoon Yoon
Life of this patent
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Abstract
A system and method of exhaust gas recirculation (EGR) in an internal combustion engine are provided. The EGR system includes a first EGR flow path and a second EGR flow path independent of the first EGR flow path that are each configured to recirculate high pressure exhaust from the exhaust system back to the engine intake system. The system includes a controller in operable communication with the EGR system configured to selectively control an amount of EGR flow through at least one of the first and second EGR flow paths.
Claims20
A system comprising:
- an internal combustion engine including a plurality of cylinders, an intake system including an intake manifold for directing a charge flow to the plurality of cylinders, and an exhaust system for receiving exhaust from the plurality of cylinders and directing the exhaust out of the exhaust system;
- an exhaust gas recirculation (EGR) system for recirculating exhaust from the exhaust system, wherein the EGR system includes an EGR flow path upstream of a turbine in the exhaust system configured to recirculate high pressure exhaust from the exhaust system to the intake system, wherein the EGR flow path includes an EGR cooler and an EGR cooler bypass for bypassing the EGR cooler;
- and
- a controller in operable communication with the EGR system configured to determine a desired amount of EGR flow and a desired EGR temperature based on a mass air flow to the intake manifold and an intake manifold pressure, and selectively control the EGR flow of the high pressure exhaust flowing through the EGR cooler and the EGR cooler bypass in response to the determination.
1 more element
A system comprising:
- an internal combustion engine including a plurality of cylinders, an intake system including an intake manifold for directing a charge flow to the plurality of cylinders, and an exhaust system for receiving exhaust from the plurality of cylinders and directing the exhaust out of the exhaust system;
- an exhaust gas recirculation (EGR) system for recirculating exhaust from the exhaust system, wherein the EGR system includes an EGR flow path upstream of a turbine in the exhaust system configured to recirculate high pressure exhaust from the exhaust system to the intake system, wherein the EGR flow path includes an EGR cooler and an EGR cooler bypass for bypassing the EGR cooler;
- and
- a controller in operable communication with the EGR system configured to determine a desired amount of EGR flow and a desired EGR temperature based on a mass air flow to the intake manifold and a measured oxygen amount in the exhaust, and selectively control the amount of EGR flow of the high pressure exhaust flowing through the EGR cooler and the EGR cooler bypass in response to the same.
1 more element
A system comprising:
- an internal combustion engine including a plurality of cylinders, an intake system including an intake manifold for directing a charge flow to the plurality of cylinders, and an exhaust system for receiving exhaust from the plurality of cylinders and directing the exhaust out of the exhaust system;
- an exhaust gas recirculation (EGR) system for recirculating exhaust from the exhaust system, wherein the EGR system includes an EGR flow path upstream of a turbine in the exhaust system configured to recirculate high pressure exhaust from the exhaust system to the intake system, wherein the EGR flow path includes an EGR cooler and an EGR cooler bypass for bypassing the EGR cooler;
- and
- a controller in operable communication with the EGR system configured to determine a desired amount of EGR flow and a desired EGR temperature based on a mass air flow to the intake manifold and an oxygen amount measured at the intake manifold, and selectively control an amount of EGR flow of the high pressure exhaust flowing through the EGR cooler and the EGR cooler bypass in response to the same.
1 more element
Dependencies are inferred from the claim text.