Integrated bypass and variable geometry configuration for an exhaust gas turbocharger
View Patent ↗An exhaust gas turbocharger comprising: a twin scroll turbine housing; a turbine wheel positioned in the twin scroll housing; an exhaust gas inlet, operatively connected to port exhaust gas through each side of the twin scroll turbine housing and onto the turbine wheel; a bypass, operatively connected to the exhaust gas inlet to port exhaust gas around the twin scroll turbine housing to bypass the turbine wheel; and a valve, operatively positioned to control exhaust gas flow to each side of the twin scroll turbine housing and the bypass.
1. An exhaust gas turbocharger comprising:
a twin scroll turbine housing;
a turbine wheel positioned in said twin scroll housing;
at least two exhaust gas inlets operatively connected to port exhaust gas through each side of said twin scroll turbine housing and onto said turbine wheel;
a bypass operatively connected to port exhaust gas around said at least two exhaust gas inlets to bypass said turbine wheel; and
a valve operatively positioned to control exhaust gas flow to said at least two exhaust gas inlets and said bypass;
wherein said valve selectively blocks said at least two exhaust gas inlets on start-up to direct exhaust gas to heat a catalytic converter and said valve blocks one of said at least two exhaust gas inlets during non-start-up conditions.
2. The exhaust gas turbocharger of claim 1 , where said valve is a barrel valve.
3. The exhaust gas turbocharger of claim 1 , further comprising an electronic controller operationally coupled to position said valve.
4. An exhaust gas turbocharger mounted on a gasoline fueled engine, said exhaust gas turbocharger comprising:
a twin scroll turbine housing;
a turbine wheel positioned in said twin scroll housing;
at least two exhaust gas inlets operatively connected to port exhaust gas through each side of said twin scroll turbine housing and onto said turbine wheel;
a bypass operatively connected to port exhaust gas around said at least two exhaust gas inlets to bypass said turbine wheel; and
a valve operatively positioned to control exhaust gas flow to said at least two exhaust gas inlets and said bypass;
a processor configured to position said valve;
wherein said valve selectively blocks said at least two exhaust gas inlets on start-up to direct exhaust gas to heat a catalytic converter and said valve blocks one of said at least two exhaust gas inlets during non-start-up conditions.
5. The exhaust gas turbocharger of claim 4 , where said valve is a barrel valve.