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US 9,957,822 B2Granted
Asymmetric twin scroll volute
AssigneeBorgWarner Inc.
InventorsGregory David Uhlenhake, Matthew Brian Cooley
Life of this patent
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AssigneeBorgWarner Inc.
InventorsGregory David Uhlenhake, Matthew Brian Cooley
Estimating the term…
An asymmetric twin scroll turbine 10 combined with an integrated exhaust manifold cylinder head 20 may be designed to accommodate mixed, radial or axial flow turbines. The asymmetric twin scroll turbine 10 includes a first scroll 11 and second scroll 12 wherein the first scroll 11 is larger and has greater mass flow capacity than the second scroll 12. The larger volute increases flow capacity and counteracts backpressure creating evenly balanced or equalized peak pressures and pulsations between both volutes and balancing of gas flow between cylinder sets. By equalizing peak pressures, pulsations, and gas flow between cylinder sets, engine self-ignition can be avoided in the cylinder set that would have had the largest peak pressures and pulsations. By in creasing flow capacity of the larger volute and balancing gas flow between cylinder sets, the turbine pressure differential is reduced and the engine can operate more efficiently, improving fuel economy.
An engine system (1) comprising an asymmetric turbine (10) combined with an integrated cylinder head and exhaust manifold (20) including
An engine system (1) comprising an asymmetric turbine (10) combined with an integrated cylinder head and exhaust manifold (20 including
An engine system (1) comprising an asymmetric turbine (10) combined with an integrated cylinder head and exhaust manifold (20 including
A process for optimizing the amount of asymmetry of volutes of an asymmetric twin scroll turbine, where the amount of asymmetry is defined by a scaling factor, the process comprising
Dependencies are inferred from the claim text.