Air supply device for an internal combustion engine

• US 20060150928A1
• Filed: 01/31/2006
• Published: 07/13/2006
• Est. Priority Date: 08/01/2003
• Status: Active Grant

• Current Assignee: Chemtron Research LLC (Intellectual Ventures LLC)
• Original Assignee: Daimler AG (Mercedes-Benz Group AG)
• Inventors: Stark, Holger, Schlegl, Martin, Lehmann, Hans-Georg
• Granted Patent: US 7,513,107 B2
• Time in Patent Office: Days
• US Class Current: 123/26
• CPC Class Codes: F01N 3/32 using air pump using jet air pumps F01N3/34; pumps in general F04
• CPC Class Codes: F02C 1/02 the working fluid being an unheated pressurised gas
• CPC Class Codes: F02D 2009/0283 Throttle in the form of an expander
• CPC Class Codes: F04D 29/023 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/284 for compressors
• CPC Class Codes: F04D 29/70 Suction grids; Strainers; Dust separation; Cleaning
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: F05D 2300/12 Light metals
• CPC Class Codes: F05D 2300/17 Alloys
• CPC Class Codes: F05D 2300/43 Synthetic polymers, e.g. plastics; Rubber
• CPC Class Codes: F05D 2300/433 Polyamides, e.g. NYLON
• CPC Class Codes: F05D 2300/436 Polyetherketones, e.g. PEEK
• CPC Class Codes: F05D 2300/603 Composites; e.g. fibre-reinforced
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

In a secondary air supply device comprising a turbine and a compressor with turbine and compressor wheels having blades which are covered by wheel covers and an air filter structure disposed between the turbine and compressor wheels, so that air is supplied to the compressor and to the turbine from a common filter structure disposed between the compressor and the turbine wheels.

Claims

1. A secondary air supply device comprising at least one of a radial type compressor and turbine rotor (52, 63) said rotor including a wheel (53) having blades which are covered by a wheel cover (72), the secondary air supply device having a secondary air charger (14) with a compressor (15) and with a turbine (16), the turbine (16) being driven via the vacuum which prevails in an intake section (5) of an internal combustion engine and the compressor (15) having a compressor wheel (53) which supplies secondary air into an exhaust gas region (12) of the internal combustion engine, the air which is required by the compressor (15) and by the turbine (16) being supplied via a common air filter (45), the secondary air supply device (14) having a housing (47) with a frame structure (48, 49, 50) forming a space (60) with a common air filter element (45) disposed in the space (60)

2. A secondary air supply device according to claim 1, wherein the rotor (52, 53) has spiral blades and the blades of the compressor rotor (53) and those of the turbine rotor (52) are configured in opposite directions.

3. A secondary air supply device according to claim 1, wherein the air filter element (45) is of U-shaped configuration.

4. A secondary air supply device according to claim 3, wherein the air filter element (45) is accommodated in the housing (47) in a latched manner.

5. A secondary air supply device according to claim 2, wherein a groove (66) is provided on side parts (61) of the air filter element (45) which are disposed opposite one another, and a latching lug is provided in a corresponding manner on the housing (47) for engagement in the groove (66).

6. A secondary air supply device according to claim 5, wherein grooves (66) are provided on both side parts (61) of the air filter element (45), the grooves being disposed opposite one another, and two latching lugs (90) are provided in a corresponding manner on a side strut (50′

″

) of a side element (49) of the housing (47) of the secondary air charger (14).

7. A secondary air supply device according to claim 1, wherein a side element (49) of the housing (47) has a tubular element (95) which forms an inflow channel for the compressor (15) or compressor wheel (53).

8. A secondary air supply device according to claim 7, wherein the tubular element (95) is an integral part of the side element (49).

9. A secondary air supply device according to claim 7, wherein at least one aperture (96) is provided on one side of the tubular element (95).

10. A secondary air supply device according to claim 1, wherein at least one of the compressor wheel (53) and the turbine wheel (52) consists at least partially of a plastic material, preferably of polyamide and/or PEEK and/or PFA.

11. A secondary air supply device according to claim 10, wherein the plastic material is fiber reinforced.

12. A secondary air supply device according to claim 1, wherein at least one of the compressor wheel (53) and the turbine wheel (52) is composed at least partially of a light metal alloy.

13. A secondary air supply device according to claim 1, wherein the compressor wheel is a multistage wheel.

14. A secondary air supply device according to claim 13, wherein a plurality of compressor wheels are arranged in series so as to form a multi-stage compressor wheel.