Patent ID: 8161747

Claim:
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; an exhaust gas recirculation circuit in fluid communication with only the first exhaust manifold; a first turbocharger having dual volutes configured to simultaneously receive exhaust from the first exhaust manifold and the second exhaust manifold; a second turbocharger configured to receive exhaust from the first turbocharger and receive and compress inlet air directed into the engine; a balancing valve associated with the first turbocharger and configured to adjust an amount of exhaust directed through the exhaust gas recirculation circuit; a control valve located within the exhaust gas recirculation circuit to regulate a flow of exhaust directed through the exhaust gas recirculation circuit; a flow sensor located in the exhaust gas recirculation circuit; and a controller in communication with the flow sensor, the control valve, and the balancing valve, the controller being configured to regulate operation of the control valve and the balancing valve in response to input from the flow sensor.