Abstract:
A method of providing exhaust gas recirculation (EGR) to an air-boosted internal combustion engine. The engine has both a high pressure EGR loop and a low pressure EGR loop. Each EGR loop has a valve that controls the amount of EGR that is delivered to the engine intake from that loop. During low-speed engine conditions, more EGR is delivered to the engine intake from the low pressure EGR loop than from the high pressure EGR loop. During high-speed engine conditions, more EGR is delivered to the engine intake from the high pressure EGR loop than from the low pressure EGR loop.
Patent Number:
9,309,804
Date Of Issue:
04/11/2016
Inventors:
Christopher J. Chadwell; Terrence F. Alger II; Shinhyuk Joo
Full Text: