Integrated bypass and variable geometry configuration for an exhaust gas turbocharger

• US 20050086936A1
• Filed: 10/28/2003
• Published: 04/28/2005
• Est. Priority Date: 10/28/2003
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Daimler Chrysler Corporation (Mercedes-Benz Group AG)
• Inventors: Bayer, Ethan, Bucknell, John R.
• Granted Patent: US 6,941,755 B2
• Time in Patent Office: Days
• US Class Current: 60/602
• CPC Class Codes: F01D 17/146 by throttling the volute inlet of radial machines or engines
• CPC Class Codes: F01D 17/148 by means of rotatable members, e.g. butterfly valves
• CPC Class Codes: F01D 9/026 Scrolls for radial machines or engines
• CPC Class Codes: F01N 3/2006 Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235
• CPC Class Codes: F01N 3/28 Construction of catalytic reactors
• CPC Class Codes: F02B 37/025 Multiple scrolls or multiple gas passages guiding the gas to the pump drive
• CPC Class Codes: F02B 37/183 Arrangements of bypass valves or actuators therefor
• CPC Class Codes: F02B 37/22 by varying cross-section of exhaust passages or air passages , e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits F02B37/24 takes precedence
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

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.

Claims

1. An exhaust gas turbocharger comprising:

a twin scroll turbine housing;

a turbine wheel positioned in said twin scroll housing;

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 exhaust gas inlets to bypass said turbine wheel; and

a valve, operatively positioned to control exhaust gas flow to said exhaust gas inlets and said bypass.

2. The exhaust gas turbocharger of claim 1, where said valve is a barrel valve.

3. The exhaust gas turbocharger of claim 1, where said valve can be positioned to completely block said exhaust gas inlets on start-up to direct exhaust gas to heat a catalytic converter.

4. The exhaust gas turbocharger of claim 1, further comprising an electronic controller operationally coupled to position said valve.

5. 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;

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 exhaust gas inlets to bypass said turbine wheel;

a valve, operatively positioned to control exhaust gas flow to said exhaust gas inlets and said bypass; and

a processor configured to position said valve.

6. The exhaust gas turbocharger of claim 5, where said valve is a barrel valve.

7. The exhaust gas turbocharger of claim 5, where said valve can be positioned to completely block said exhaust gas inlets on start-up to direct all exhaust gas to heat a catalytic converter.