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Engine with pulse-suppressed dedicated exhaust gas recirculation

Patent ·
OSTI ID:1344806
An engine assembly includes an intake assembly, a spark-ignited internal combustion engine, and an exhaust assembly. The intake assembly includes a charge air cooler disposed between an exhaust gas recirculation (EGR) mixer and a backpressure valve. The charge air cooler has both an inlet and an outlet, and the back pressure valve is configured to maintain a minimum pressure difference between the inlet of the charge air cooler and an outlet of the backpressure valve. A dedicated exhaust gas recirculation system is provided in fluid communication with at least one cylinder and with the EGR mixer. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the at least one cylinder to the EGR mixer for recirculation back to the engine.
Research Organization:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0005654
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
Patent Number(s):
9,359,976
Application Number:
13/869,313
OSTI ID:
1344806
Country of Publication:
United States
Language:
English

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