Method and apparatus for supplying air to emission abatement device by use of turbocharger

• US 20060242946A1
• Filed: 04/29/2005
• Published: 11/02/2006
• Est. Priority Date: 04/29/2005
• Status: Active Grant

• Current Assignee: ET US Holdings LLC
• Original Assignee: Arvin Technologies, Inc. (Meritor, Inc. (Nevada))
• Inventors: Kong, Yougen, Taylor, William III, Kozakiewicz, Tomasz, Huffmeyer, Christopher R., Abel, John
• Granted Patent: US 7,464,539 B2
• Time in Patent Office: Days
• US Class Current: 60/279
• CPC Class Codes: F01N 13/009 having two or more separate purifying devices arranged in series
• CPC Class Codes: F01N 2240/14 a fuel burner
• CPC Class Codes: F01N 2240/30 a fuel reformer
• CPC Class Codes: F01N 2610/03 the substance being hydrocarbons, e.g. engine fuel
• CPC Class Codes: F01N 3/025 using fuel burner or by adding fuel to exhaust
• CPC Class Codes: F01N 3/035 with catalytic reactors , e.g. catalysed diesel particulate filters
• CPC Class Codes: F01N 3/0814 combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
• CPC Class Codes: F01N 3/0842 Nitrogen oxides
• CPC Class Codes: F01N 3/106 Auxiliary oxidation catalysts
• CPC Class Codes: F01N 3/2033 using a fuel burner or introducing fuel into exhaust duct
• CPC Class Codes: F01N 3/2066 Selective catalytic reduction [SCR]
• CPC Class Codes: F01N 3/22 Control of additional air supply only, e.g. using by-passes or variable air pump drives
• CPC Class Codes: F01N 3/32 using air pump using jet air pumps F01N3/34; pumps in general F04
• CPC Class Codes: F01N 3/326 Engine-driven air pumps
• CPC Class Codes: F02B 37/166 the auxiliary apparatus being a combustion chamber, e.g. upstream of turbine
• CPC Class Codes: F02B 37/168 into the exhaust conduit F02B37/166 takes precedence
• CPC Class Codes: F02M 23/12 characterised by being combined with device for, or by secondary air effecting, re-atomising of condensed fuel
• CPC Class Codes: F02M 27/02 by catalysts
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An apparatus comprises a combustion engine, an emission abatement device, and a turbocharger. The emission abatement device is fluidly coupled to the engine to receive exhaust gas therefrom. The turbocharger comprises an air compressor that is fluidly coupled to the engine to supply pressurized air to the engine and that is fluidly coupled to the emission abatement device via a flow path not including any combustion section of the engine to supply pressurized air to the emission abatement device. An associated method is disclosed.

Claims

1. A method, comprising the step of:

operating a turbocharger so as to advance pressurized air (i) from the turbocharger to a combustion engine and (ii) from the turbocharger to an emission abatement device via a flow path not including any combustion section of the engine.

2. The method of claim 1, wherein the operating step comprises:

operating a turbine of the turbocharger with exhaust gas of the engine, and

operating an air compressor of the turbocharger in response to operation of the turbine so as to advance pressurized air from the air compressor to the engine and the emission abatement device.

3. The method of claim 1, wherein the operating step comprises:

dividing a stream of pressurized air discharged from an air compressor of the turbocharger into a first air stream and a second air stream,

advancing the first air stream to the engine, and

advancing the second air stream to the emission abatement device.

4. The method of claim 1, wherein the operating step comprises operating an air valve to control flow of pressurized air from the turbocharger to the engine and to the emission abatement device.

5. The method of claim 1, wherein:

the emission abatement device comprises a thermal regenerator, and

the operating step comprises simultaneously advancing pressurized air from the turbocharger to the engine and from the turbocharger to the thermal regenerator.

6. The method of claim 1, wherein:

the emission abatement device comprises a fuel reformer, and

the operating step comprises simultaneously advancing pressurized air from the turbocharger to the engine and from the turbocharger to the fuel reformer.

7. An apparatus, comprising:

a combustion engine,

an emission abatement device fluidly coupled to the engine to receive exhaust gas therefrom, and

a turbocharger comprising an air compressor that is fluidly coupled to the engine to supply pressurized air to the engine and that is fluidly coupled to the emission abatement device via a flow path not including any combustion section of the engine to supply pressurized air to the emission abatement device.

8. The apparatus of claim 7, wherein:

the engine comprises an air inlet and an exhaust gas outlet,

the emission abatement device comprises an air inlet and an exhaust gas inlet,

the air compressor comprises a pressurized air outlet fluidly coupled to the air inlets of the engine and the emission abatement device, and

the turbocharger comprises a turbine comprising (i) an exhaust gas inlet fluidly coupled to the exhaust gas outlet of the engine and (ii) an exhaust gas outlet fluidly coupled to the exhaust gas inlet of the emission abatement device.

9. The apparatus of claim 7, further comprising first, second, and third air lines secured to one another at a junction, wherein:

the first air line connects the air compressor and the junction,

the second air line connects the junction and the engine, and

the third air line connects the junction and the emission abatement device.

10. The apparatus of claim 9, wherein the third air line comprises an air valve.

11. The apparatus of claim 7, wherein:

the emission abatement device comprises a particulate filter and a burner for burning particulate matter trapped by the particulate filter, and

the air compressor is fluidly coupled to the burner to supply pressurized air thereto.

12. The apparatus of claim 7, wherein:

the emission abatement device comprises a component and a fuel reformer fluidly coupled to the component to supply reformate gas thereto, and

the air compressor is fluidly coupled to the fuel reformer to supply pressurized air thereto.

13. The apparatus of claim 12, wherein the fuel reformer is a plasma fuel reformer and the emission abatement component is a NOx adsorber.

14. The apparatus of claim 7, further comprising an air valve configured to control flow of pressurized air from the air compressor to the engine and to the emission abatement device.

15. The apparatus of claim 14, further comprising (i) an engine control unit electrically coupled to the engine and (ii) a controller electrically coupled to the engine control unit, the air valve, and the emission abatement device.

16. The apparatus of claim 14, further comprising an engine control unit electrically coupled to the engine, the air valve, and the emission abatement device.

17. The apparatus of claim 7, further comprising an engine control unit configured to control the engine according to a first engine control mode when pressurized air is advanced from the air compressor to the engine but not to the emission abatement device and configured to control the engine according to a second engine control mode when pressurized air is advanced from the air compressor to the engine and to the emission abatement device.

18. An apparatus, comprising:

an emission abatement component,

a thermal regenerator configured to generate heat for regeneration of the emission abatement component, and

a turbocharger comprising an air compressor fluidly coupled to the thermal regenerator via a flow path not including any engine combustion section to supply pressurized air to the thermal regenerator.

19. The apparatus of claim 18, further comprising a fuel supplier and an atomization air supplier, wherein:

the emission abatement component comprises a particulate filter,

the thermal regenerator comprises a fuel-fired burner for burning particulate matter trapped by the particulate filter,

the fuel supplier is fluidly coupled to the burner,

the atomization air supplier is fluidly coupled to the burner to supply fuel-atomization air for atomization of fuel supplied by the fuel supplier, and

the turbocharger comprises (i) a turbine fluidly coupled to an exhaust gas outlet of a combustion engine and (ii) an air compressor mechanically coupled to the turbine to be operated thereby and fluidly coupled to the burner to supply combustion air for combustion with fuel supplied by the fuel supplier.

20. The apparatus of claim 18, further comprising a combustion engine, wherein the turbocharger is also fluidly coupled to the engine to supply pressurized air thereto.