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AssigneeInternational Engine Intellectual Property Company, LLC
InventorsLuis Carlos Cattani, Michael D. Bartkowicz, Martin R. Zielke, John Zagone
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A method for driving exhaust gas recirculation comprising the steps of restricting exhaust gas flow into the turbine inlet to create backpressure in the exhaust system under low engine operating conditions, and providing an unrestricted exhaust gas flow to the turbine under normal engine operating conditions. Restriction of exhaust gas flow is accomplished through the use of an exhaust gas throttle valve disposed upstream of the turbine inlet. The valves can be adjustable knife edge flap valves or D-shaped valves situated in each passageway of a divided exhaust manifold, which are closed to varying degrees to generate desired levels of backpressure while allowing exhaust gas to pass though open regions of the partially obstructed flow pathway to reach the engine turbocharger. This allows the turbine to continue to spin, while at the same time exhaust gas back pressure upstream of the turbocharger is used to drive exhaust gas recirculation.
A method for driving exhaust gas recirculation in a turbocharged internal combustion engine, the turbocharger having a turbine and a compressor, the turbine having a turbine wheel within a turbine housing, the turbine housing having a first inlet, a second inlet and an outlet, the turbine wheel operatively connected to the compressor to spin a compressor wheel within the compressor to pressurize intake air into an intake manifold of the engine, comprising the steps of:
An exhaust gas recirculation system, comprising:
Dependencies are inferred from the claim text.