Engine exhaust gas passage flow orifice and method
AssigneeInternational Engine Intellectual Property Company, LLC
InventorTimothy Lyons
Life of this patent
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Abstract
An apparatus includes a gas passage (700) having a gas inlet (702), an engine gas outlet (704), and at least one exhaust gas recirculation (EGR) gas outlet (706), wherein the at least one EGR gas outlet (706) is disposed between the gas inlet (702) and the engine gas outlet (704). The gas passage (700) is arranged to receive exhaust gas through the inlet (702) and expel gas through both the gas outlets (704 and 706). A flow orifice (710) is operatively associated with the gas passage (700) and is disposed between the engine gas outlet (704) and the at least one EGR gas outlet (706).
Claims16
An apparatus comprising:
- an exhaust system defining a gas passage having a gas inlet, an engine gas outlet, and at least one exhaust gas recirculation (EGR) outlet, wherein the EGR outlet is disposed between the gas inlet and the engine gas outlet, said gas passage disposed to receive exhaust gas through said inlet and expel gas through both of said outlets;
- a flow orifice operatively associated with the exhaust system and disposed to restrict the flow area of the gas passage downstream of the at least one EGR gas outlet.
In a turbocharged internal combustion engine having an intake system, an exhaust system in fluid communication with the plurality of cylinders, a turbine in fluid communication with the exhaust manifold and an exhaust gas recirculation (EGR) passage fluidly connecting the exhaust system with the intake system and containing an EGR valve and an EGR gas passage fluidly connecting the exhaust system with the EGR passage and with the turbine downstream of the EGR passage, the improvement comprising:
- an orifice disposed in the gas passage downstream of the EGR passage and upstream of the turbine.
A method for augmenting flow out of a gas passage, comprising the steps of:
- collecting exhaust gas in a volume of an internal combustion engine;
- flowing the exhaust gas out of the volume to form an exhaust gas flow into a junction;
- constricting a first portion of the exhaust gas flow exiting the junction with an orifice;
- routing the first portion of the exhaust gas flow to a turbine;
- and
- routing an unconstricted second portion of the exhaust flow exiting the junction to an EGR cooler.
Dependencies are inferred from the claim text.