Patent ID: 8938962
Filing Date: 2015-01-27
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. An exhaust system for an engine, comprising: a first exhaust manifold configured to receive exhaust from the engine; a second exhaust manifold configured to receive exhaust from the engine in parallel with the first exhaust manifold; at least two turbochargers configured to receive exhaust from the first and second exhaust manifolds; a first turbocharger valve fluidly connected to one of the at least two turbochargers, the first turbocharger valve being configured to selectively fluidly connect the one of the at least two turbochargers to the first and second exhaust manifolds; a recirculation circuit in fluid communication with the first exhaust manifold, the recirculation circuit including a first recirculation valve configured to regulate passage of exhaust through the recirculation circuit; a common intake manifold, wherein the recirculation circuit fluidly connects the first exhaust manifold to the common intake manifold via the first recirculation valve; a second turbocharger valve fluidly connected to the one of the at least two turbochargers, the second turbocharger valve being configured to selectively fluidly connect the one of the at least two turbochargers to the common intake manifold; and wherein the first turbocharger valve is configured to block exhaust from entering the one of the at least two turbochargers in response to greater than or equal to approximately 20 percent of exhaust exiting the engine being directed to the recirculation circuit.