Patent ID: 8944035
Filing Date: 2015-02-03
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. An engine system comprising: a first cylinder group including at least one first cylinder; a second cylinder group including at least one second cylinder; an intake manifold coupled to the first cylinder group and the second cylinder group; a first EGR passage coupled between the at least one first cylinder of the first cylinder group and the intake manifold; a second EGR passage coupled between the at least one second cylinder of the second cylinder group and the intake manifold; a first EGR valve, positioned in the first EGR passage, operable to control exhaust gas flow to the intake manifold; a second EGR valve, positioned in the second EGR passage, operable to control exhaust gas flow to the intake manifold; and a controller operable to backpressure only as many cylinder groups of the first cylinder group and the second cylinder group as needed to provide a commanded EGR gas flow, including the controller being operable to: