Device for compressing combustion air

• US 20070000481A1
• Filed: 06/30/2004
• Published: 01/04/2007
• Est. Priority Date: 09/01/2003
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Baeurle, Michael, Reisinger, Carsten
• Application Number:
  US10/568,857
• Publication Number:
  US 20070000481A1
• Time in Patent Office: Days
• US Class Current: 123/562
• CPC Class Codes: F02B 33/34 with rotary pumps with cell-type pressure exchangers or the like F02B33/42
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 37/16 by bypassing charging air
• CPC Class Codes: F02B 37/18 by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

The invention relates to a device for compressing combustion air, in particular a device for compressing charge air for an automotive combustion engine, with at least one electrically operated charge-air compressor (12, 14), which features at least one compressor impeller (24) that is arranged in a compressor space (22) and driven by an electric motor (18), as well as with a second, additional charge-air compressor (32, 34), in particular an exhaust-gas turbocharger (34), that is connected serially to the electric charge-air compressor (14), which are connected to one another in terms of flow via connecting means (30). It is proposed in accordance with the invention that connecting means (52) are present, which make it possible to guide already compressed charge air into the compressor space (22) of the electric charge-air compressor (14).

Claims

1. Device for compressing combustion air, in particular a device for compressing charge air for an automotive combustion engine, with at least one electrically operated charge-air compressor (14), which features at least one compressor impeller (24) that is arranged in a compressor space (22) and driven by an electric motor (18), as well as with a second, additional charge-air compressor (32), in particular an exhaust-gas turbocharger (34), that is connected serially to the electric charge-air compressor (14), which are connected to one another in terms of flow via connecting means (30), characterized in that connecting means (52) are present, which make it possible to introduce compressed charge air into the compressor space (22) of the electric charge-air compressor (14).

2. Device for compressing combustion air according to claim 1, characterized in that the connecting means (52) branch off on the downstream side of the second charge-air compressor (32, 34) and discharge into the compressor space (22) of the electric charge-air compressor (14).

3. Device for compressing combustion air according to claim 2, characterized in that the connecting means (52) discharge directly into a ring channel (26) of the housing of the electric charge-air compressor (14).

4. Device for compressing combustion air according to claim 3, characterized in that the ring channel (26) is embodied on the low-pressure side of the electric charge-air compressor (14).

5. Device for compressing combustion air according to claim 1, characterized in that the connecting means (52) have a valve (54), in particular a membrane valve that can be triggered electronically.

6. Device for compressing combustion air according to claim 5, characterized in that the valve is integrated into a housing of the electric charge-air compressor (14).

7. Device for compressing combustion air according to claim 1, characterized in that the connecting means (52) have a storage volume (58).

8. Device for compressing combustion air according to claim 2, characterized in that the connecting means (52) have a valve (54), in particular a membrane valve that can be triggered electronically.

9. Device for compressing combustion air according to claim 3, characterized in that the connecting means (52) have a valve (54), in particular a membrane valve that can be triggered electronically.

10. Device for compressing combustion air according to claim 4, characterized in that the connecting means (52) have a valve (54), in particular a membrane valve that can be triggered electronically.

11. Device for compressing combustion air according to claim 2, characterized in that the connecting means (52) have a storage volume (58).

12. Device for compressing combustion air according to claim 3, characterized in that the connecting means (52) have a storage volume (58).

13. Device for compressing combustion air according to claim 4, characterized in that the connecting means (52) have a storage volume (58).

14. Device for compressing combustion air according to claim 5, characterized in that the connecting means (52) have a storage volume (58).

15. Device for compressing combustion air according to claim 6, characterized in that the connecting means (52) have a storage volume (58).

16. Device for compressing combustion air according to claim 8, characterized in that the valve is integrated into a housing of the electric charge-air compressor (14).

17. Device for compressing combustion air according to claim 9, characterized in that the valve is integrated into a housing of the electric charge-air compressor (14).

18. Device for compressing combustion air according to claim 10, characterized in that the valve is integrated into a housing of the electric charge-air compressor (14).

19. Device for compressing combustion air according to claim 18, characterized in that the connecting means (52) have a storage volume (58).