WO2009079669A1 - Intercooler - Google Patents
Intercooler Download PDFInfo
- Publication number
- WO2009079669A1 WO2009079669A1 PCT/ZA2007/000091 ZA2007000091W WO2009079669A1 WO 2009079669 A1 WO2009079669 A1 WO 2009079669A1 ZA 2007000091 W ZA2007000091 W ZA 2007000091W WO 2009079669 A1 WO2009079669 A1 WO 2009079669A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- intercooler
- air
- conduits
- cooled
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
- F02B29/0412—Multiple heat exchangers arranged in parallel or in series
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- This invention relates to a charge air cooler or intercooler for cooling air to be fed to an intake manifold of an engine.
- Conventional intercoolers are used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing the density of the charge air to be fed to the intake of the engine manifold and combustion chamber.
- a decrease in intake air temperature and pressure provides a denser intake charge to the engine and allows more air and fuel to be combusted per engine cycle, thereby increasing the output of the engine.
- intercoolers either exchange heat directly with the atmosphere (air-to-air intercoolers) or they are in the form of heat exchangers that reject intake charge heat to an intermediate fluid (air-to-liquid intercoolers), which finally rejects heat to the air.
- Air-to-air intercoolers are typically mounted in areas of a vehicle with maximum air flow, such as near the front bumper, in line with the car's radiator. Accordingly, the velocity at which the air travels into the intercooler is proportional to the speed of the vehicle.
- an intercooler including:- an air inlet; - a first heat exchanger including conduits for conveying a first working fluid for absorbing heat from air to be cooled entering the first heat exchanger via the air inlet; and a second heat exchanger defining a flow path for a second working fluid for absorbing heat from air to be cooled entering the second heat exchanger and conveyed by conduits of the second heat exchanger, wherein the second working fluid is cooled air exiting the first heat exchanger, and wherein the air to be cooled in the second heat exchanger is air exiting the second heat exchanger and fed to the conduits thereof; wherein the intake of air via the air inlet is achieved by a suction force exerted by an engine connected in flow communication with the intercooler.
- the first and second heat exchangers may be cross-flow heat exchangers.
- the conduits of the first heat exchanger may be arranged in a spaced apart relationship.
- the air to be cooled entering the first heat exchanger may pass through the spaces intermediate the conduits, thereby rejecting heat to the first working fluid.
- the first working fluid may be a refrigerant.
- the first working fluid may be selected from the group including: water, Puran ®, R-22, R-12, Duracool ®, and nitrous oxide (R-744A.)
- the conduits of the second heat exchanger may be arranged in a spaced apart relationship.
- the air entering the second heat exchanger from the first heat exchanger may pass through the spaces intermediate the conduits, thereby acting as the second working fluid for absorbing heat from the air to be cooled and conveyed by the conduits.
- Cooled air exiting the second heat exchanger may be fed to an intake manifold of an internal combustion engine.
- the second working fluid exiting the second heat exchanger may be compressed prior to being fed to the conduits of the second heat exchanger as air to be cooled.
- the second working fluid exiting the second heat exchanger may be passed through a conventional intercooler prior to being fed to the conduits of the second heat exchanger as air to be cooled.
- the first and second heat exchangers may be at least partially enclosed by a housing.
- the housing may include the air inlet.
- a cooling system for improving the efficiency of an internal combustion engine including an intercooler as described above.
- the cooling system may include a compressor for compressing the second working fluid exiting the second heat exchanger prior to it being fed to the conduits of the second heat exchanger as air to be cooled.
- the cooling system may include a conventional intercooler for pre-cooling the second working fluid exiting the second heat exchanger prior to it being fed to the conduits of the second heat exchanger as air to be cooled.
- the system may include one or more flow restrictions in conduits connecting component parts of the system to reduce the pressure of air flowing through the conduits.
- An important advantage of the above intercooler and system when compared to conventional intercoolers is that it functions independently of the speed at which the vehicle is travelling as the air flow through the intercooler is achieved by the suction force of the engine.
- the intercooler functions as soon as the vehicle engine is on, even if the vehicle is stationary, as can happen during traffic jams. Overheating of the engine is thus avoided during such a situation.
- Figure 1 shows an exploded view of an embodiment of an intercooler in accordance with the present invention
- Figure 2 shows a three-dimensional schematic view of a second heat exchanger of the intercooler of Figure 1 ;
- Figure 3 shows and embodiment of a cooling system for improving the efficiency of an internal combustion engine in accordance with the present invention.
- reference numeral 10 generally indicates an embodiment of an intercooler in accordance with the present invention.
- the intercooler 10 includes an air inlet 12 and a first heat exchanger 14 including conduits (not shown) for conveying a first working fluid 18 for absorbing heat from air to be cooled 20 entering the first heat exchanger 14 via the air inlet 12.
- the intercooler further includes a second heat exchanger 22 defining a flow path 24 for a second working fluid 26 for absorbing heat from air to be cooled 28 entering the second heat exchanger 22 and conveyed by conduits 16 of the second heat exchanger 22.
- the second working fluid 26 is cooled air exiting the first heat exchanger 14.
- the air 28 to be cooled in the second heat exchanger 22 is air 30 exiting the second heat exchanger 22 and fed to the conduits 16 thereof.
- the intake of air 20 via the air inlet i12 s achieved by a suction force exerted by an engine (not shown) connected in flow communication with the intercooler 10. Accordingly, the intercooler 10 does not rely on the speed of a vehicle in which it is mounted to achieve the flow of air 20 into the intercooler 10.
- the first and second heat exchangers 14 and 22 are cross-flow heat exchangers.
- the conduits of the first heat exchanger 14 are arranged in a spaced apart relationship so that the air 20 to be cooled entering the first heat exchanger 14 can pass through the spaces intermediate the conduits, thereby rejecting heat to the first working fluid 18.
- the first working fluid 18 is a refrigerant selected from the group including: water, Puran ®, R-22, R-12, Duracool ®, and nitrous oxide (R-744A.)
- the conduits 16 of the second heat exchanger 22 are arranged in a spaced apart relationship.
- the air 26 entering the second heat exchanger 22 from the first heat exchanger 14 passes through the spaces intermediate the conduits 16, thereby acting as the second working fluid 26 for absorbing heat from the air 28 to be cooled and conveyed by the conduits 16.
- Cooled air 32 exiting the second heat exchanger 22 is fed to an intake manifold 34 of an internal combustion engine (not shown).
- the second working fluid 26/ 30 exiting the second heat exchanger 22 can optionally be compressed prior to being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
- the second working fluid 26/30 exiting the second heat exchanger 22 can further optionally be passed through a conventional intercooler 36 prior to being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
- the first and second heat exchangers 14 and 22 are at least partially enclosed by a housing 38, which includes the air inlet 12.
- the air 30 is compressed or cooled prior to being fed to the second heat exchanger 22 depends on the type of engine connected to the intercooler 10. If the engine is turbocharged or supercharged, then the air 30 is only compressed. If the engine is normally aspirated, the air 30 is neither compressed nor cooled.
- the cooling system 40 for improving the efficiency of an internal combustion engine including an intercooler 10 as described above.
- the cooling system 40 optionally includes a compressor 42 for compressing the second working fluid 26/30 exiting the second heat exchanger 22 prior to it being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
- the cooling system 40 optionally includes a conventional intercooler 36 for pre- cooling the second working fluid 26/30 exiting the second heat exchanger 22 prior to it being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
- the system 40 includes a plurality of flow restrictions 44 in conduits 46 connecting component parts of the system 40 to reduce the pressure of air flowing through the conduits 46.
- the air 30 is only compressed and follows the flow path indicated by dotted lines "A". If the engine is normally aspirated, the air 30 is neither compressed nor cooled and follows the flow path indicated by dotted lines "B".
- the first working fluid 18 is pumped through the conduits 46 by pump 48 and air sucked into the intercooler 10 is first passed through an air filter 50.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The intercooler 10 includes an air inlet 12 and a first heat exchanger 14 including conduits (not shown) for conveying a first working fluid 18 for absorbing heat from air to be cooled 20 entering the first heat exchanger 14 via the air inlet 12. The intercooler further includes a second heat exchanger 22 defining a flow path 24 for a second working fluid 26 for absorbing heat from air to be cooled 28 entering the second heat exchanger 22 and conveyed by conduits 16 of the second heat exchanger 22. The second working fluid 26 is cooled air exiting the first heat exchanger 14. The air 28 to be cooled in the second heat exchanger 22 is air 30 exiting the second heat exchanger 22 and fed to the conduits 16 thereof. The intake of air 20 via the air inlet i12 s achieved by a suction force exerted by an engine (not shown) connected in flow communication with the intercooler 10.
Description
INTERCOOLER
Field of the Invention
This invention relates to a charge air cooler or intercooler for cooling air to be fed to an intake manifold of an engine.
Background to the Invention
Conventional intercoolers are used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing the density of the charge air to be fed to the intake of the engine manifold and combustion chamber. A decrease in intake air temperature and pressure provides a denser intake charge to the engine and allows more air and fuel to be combusted per engine cycle, thereby increasing the output of the engine.
Known intercoolers either exchange heat directly with the atmosphere (air-to-air intercoolers) or they are in the form of heat exchangers that reject intake charge heat to an intermediate fluid (air-to-liquid intercoolers), which finally rejects heat to the air.
Air-to-air intercoolers are typically mounted in areas of a vehicle with maximum air flow, such as near the front bumper, in line with the car's radiator. Accordingly, the velocity at which the air travels into the intercooler is proportional to the speed of the vehicle.
The inventor believes, that a need exists for providing an improved intercooler which does not rely on vehicle speed for air intake velocity and which provides increased cooling capacity when compared to conventional intercoolers mentioned above.
Summary of the Invention
According to the invention, there is provided an intercooler including:- an air inlet; - a first heat exchanger including conduits for conveying a first working fluid for absorbing heat from air to be cooled entering the first heat exchanger via the air inlet; and a second heat exchanger defining a flow path for a second working fluid for absorbing heat from air to be cooled entering the second heat exchanger and conveyed by conduits of the second heat exchanger, wherein the second working fluid is cooled air exiting the first heat exchanger, and wherein the air to be cooled in the second heat exchanger is air exiting the second heat exchanger and fed to the conduits thereof; wherein the intake of air via the air inlet is achieved by a suction force exerted by an engine connected in flow communication with the intercooler.
The first and second heat exchangers may be cross-flow heat exchangers.
The conduits of the first heat exchanger may be arranged in a spaced apart relationship.
The air to be cooled entering the first heat exchanger may pass through the spaces intermediate the conduits, thereby rejecting heat to the first working fluid.
The first working fluid may be a refrigerant.
The first working fluid may be selected from the group including: water, Puran ®, R-22, R-12, Duracool ®, and nitrous oxide (R-744A.)
The conduits of the second heat exchanger may be arranged in a spaced apart relationship.
The air entering the second heat exchanger from the first heat exchanger may pass through the spaces intermediate the conduits, thereby acting as the second working fluid for absorbing heat from the air to be cooled and conveyed by the conduits.
Cooled air exiting the second heat exchanger may be fed to an intake manifold of an internal combustion engine.
The second working fluid exiting the second heat exchanger may be compressed prior to being fed to the conduits of the second heat exchanger as air to be cooled.
The second working fluid exiting the second heat exchanger may be passed through a conventional intercooler prior to being fed to the conduits of the second heat exchanger as air to be cooled.
The first and second heat exchangers may be at least partially enclosed by a housing. The housing may include the air inlet.
According to a further aspect of the invention, there is provided a cooling system for improving the efficiency of an internal combustion engine including an intercooler as described above.
The cooling system may include a compressor for compressing the second working fluid exiting the second heat exchanger prior to it being fed to the conduits of the second heat exchanger as air to be cooled.
The cooling system may include a conventional intercooler for pre-cooling the second working fluid exiting the second heat exchanger prior to it being fed to the conduits of the second heat exchanger as air to be cooled.
The system may include one or more flow restrictions in conduits connecting component parts of the system to reduce the pressure of air flowing through the conduits.
An important advantage of the above intercooler and system when compared to conventional intercoolers is that it functions independently of the speed at which the vehicle is travelling as the air flow through the intercooler is achieved by the suction force of the engine. The intercooler functions as soon as the vehicle engine is on, even if the vehicle is stationary, as can happen during traffic jams. Overheating of the engine is thus avoided during such a situation.
Detailed Description of the Invention
The invention will now be described by way of the following, non-limiting example with reference to the accompanying drawings.
In the drawings:
Figure 1 shows an exploded view of an embodiment of an intercooler in accordance with the present invention;
Figure 2 shows a three-dimensional schematic view of a second heat exchanger of the intercooler of Figure 1 ; and
Figure 3 shows and embodiment of a cooling system for improving the efficiency of an internal combustion engine in accordance with the present invention.
In the drawings, reference numeral 10 generally indicates an embodiment of an intercooler in accordance with the present invention.
The intercooler 10 includes an air inlet 12 and a first heat exchanger 14 including conduits (not shown) for conveying a first working fluid 18 for absorbing heat from air to be cooled 20 entering the first heat exchanger 14 via the air inlet 12. The intercooler further includes a second heat exchanger 22 defining a flow path 24 for a second working fluid 26 for absorbing heat from air to be cooled 28 entering the second heat exchanger 22 and conveyed by conduits 16 of the second heat exchanger 22.
The second working fluid 26 is cooled air exiting the first heat exchanger 14. The air 28 to be cooled in the second heat exchanger 22 is air 30 exiting the second heat exchanger 22 and fed to the conduits 16 thereof.
The intake of air 20 via the air inlet i12 s achieved by a suction force exerted by an engine (not shown) connected in flow communication with the intercooler 10. Accordingly, the intercooler 10 does not rely on the speed of a vehicle in which it is mounted to achieve the flow of air 20 into the intercooler 10.
The first and second heat exchangers 14 and 22 are cross-flow heat exchangers.
The conduits of the first heat exchanger 14 are arranged in a spaced apart relationship so that the air 20 to be cooled entering the first heat exchanger 14 can pass through the spaces intermediate the conduits, thereby rejecting heat to the first working fluid 18.
The first working fluid 18 is a refrigerant selected from the group including: water, Puran ®, R-22, R-12, Duracool ®, and nitrous oxide (R-744A.)
The conduits 16 of the second heat exchanger 22 are arranged in a spaced apart relationship.
The air 26 entering the second heat exchanger 22 from the first heat exchanger 14 passes through the spaces intermediate the conduits 16, thereby acting as the second working fluid 26 for absorbing heat from the air 28 to be cooled and conveyed by the conduits 16.
Cooled air 32 exiting the second heat exchanger 22 is fed to an intake manifold 34 of an internal combustion engine (not shown).
The second working fluid 26/ 30 exiting the second heat exchanger 22 can optionally be compressed prior to being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
The second working fluid 26/30 exiting the second heat exchanger 22 can further optionally be passed through a conventional intercooler 36 prior to being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
The first and second heat exchangers 14 and 22 are at least partially enclosed by a housing 38, which includes the air inlet 12.
Whether or not the air 30 is compressed or cooled prior to being fed to the second heat exchanger 22 depends on the type of engine connected to the intercooler 10. If the engine is turbocharged or supercharged, then the air 30 is only compressed. If the engine is normally aspirated, the air 30 is neither compressed nor cooled.
Referring now to Figure 3, there is shown a cooling system 40 for improving the efficiency of an internal combustion engine including an intercooler 10 as described above.
The cooling system 40 optionally includes a compressor 42 for compressing the second working fluid 26/30 exiting the second heat exchanger 22 prior to it being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
The cooling system 40 optionally includes a conventional intercooler 36 for pre- cooling the second working fluid 26/30 exiting the second heat exchanger 22 prior to it being fed to the conduits 16 of the second heat exchanger 22 as air 28 to be cooled.
The system 40 includes a plurality of flow restrictions 44 in conduits 46 connecting component parts of the system 40 to reduce the pressure of air flowing through the conduits 46.
If the engine to which the cooled air 32 is to be fed is turbocharged or supercharged, then the air 30 is only compressed and follows the flow path indicated by dotted lines "A". If the engine is normally aspirated, the air 30 is neither compressed nor cooled and follows the flow path indicated by dotted lines "B".
The first working fluid 18 is pumped through the conduits 46 by pump 48 and air sucked into the intercooler 10 is first passed through an air filter 50.
It is to be appreciated, that the invention is not limited to any particular embodiment or configuration as hereinbefore generally described or illustrated.
Claims
1. An intercooler including:- an air inlet; - a first heat exchanger including conduits for conveying a first working fluid for absorbing heat from air to be cooled entering the first heat exchanger via the air inlet; and a second heat exchanger defining a flow path for a second working fluid for absorbing heat from air to be cooled entering the second heat exchanger and conveyed by conduits of the second heat exchanger, wherein the second working fluid is cooled air exiting the first heat exchanger, and wherein the air to be cooled in the second heat exchanger is air exiting the second heat exchanger and fed to the conduits thereof; wherein the intake of air via the air inlet is achieved by a suction force exerted by an engine connected in flow communication with the intercooler.
2. An intercooler as claimed in claim 1, wherein the first and second heat exchangers are cross-flow heat exchangers.
3. An intercooler as claimed in claim 1 or claim 2, wherein the conduits of the first heat exchanger are arranged in a spaced apart relationship.
4. An intercooler as claimed in claim 3, wherein the air to be cooled entering the first heat exchanger passes through the spaces intermediate the conduits, thereby rejecting heat to the first working fluid.
5. An intercooler as claimed in any one of the preceding claims, wherein the first working fluid is a refrigerant.
6. An intercooler as claimed in any one of the preceding claims, wherein the first working fluid is selected from the group including: water, Puran ®, R- 22, R-12, Duracool ®, and nitrous oxide (R-744A.)
7. An intercooler as claimed in any one of the preceding claims, wherein conduits of the second heat exchanger are arranged in a spaced apart relationship.
8. An intercooler as claimed in claim 7, wherein the air entering the second heat exchanger from the first heat exchanger passes through the spaces intermediate the conduits, thereby acting as the second working fluid for absorbing heat from the air to be cooled and conveyed by the conduits.
9. An intercooler as claimed in any one of the preceding claims, wherein cooled air exiting the second heat exchanger is fed to an intake manifold of an internal combustion engine.
10. An intercooler as claimed in any one of the preceding claims, wherein the second working fluid exiting the second heat exchanger is compressed prior to being fed to the conduits of the second heat exchanger as air to be cooled.
11. An intercooler as claimed in any one of the preceding claims, wherein the second working fluid exiting the second heat exchanger is passed through a conventional intercooler prior to being fed to the conduits of the second heat exchanger as air to be cooled.
12. An intercooler as claimed in any one of the preceding claims, wherein the first and second heat exchangers are at least partially enclosed by a housing.
13. An intercooler as claimed in claim 12, wherein the housing includes the air inlet.
14. A cooling system for improving the efficiency of an internal combustion engine including an intercooler as claimed in any one of claims 1 to 13.
15. A cooling system as claimed in claim 14, wherein the cooling system includes a compressor for compressing the second working fluid exiting the second heat exchanger prior to it being fed to the conduits of the second heat exchanger as air to be cooled.
16. A cooling system as claimed in claim 15, wherein the cooling system includes a conventional intercooler for pre-cooling the second working fluid exiting the second heat exchanger prior to it being fed to the conduits of the second heat exchanger as air to be cooled.
17. A cooling system as claimed in any one of claims 14 to 16, wherein the system includes one or more flow restrictions in conduits connecting the component parts of the system to reduce the pressure of air flowing through the conduits.
18. An intercooler according to the invention, as hereinbefore generally described.
19. An intercooler according to the invention substantially as hereinbefore described or exemplified.
20. An intercooler as specifically described with reference to or as illustrated in any one of the accompanying drawings.
21. An intercooler including any new and inventive integer or combination of integers, substantially as herein described.
22. A cooling system according to the invention for improving the efficiency of an internal combustion engine substantially as hereinbefore described or exemplified.
23. A cooling system for improving the efficiency of an internal combustion engine including any new and inventive integer or combination of integers, substantially as herein described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ZA2007/000091 WO2009079669A1 (en) | 2007-12-19 | 2007-12-19 | Intercooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ZA2007/000091 WO2009079669A1 (en) | 2007-12-19 | 2007-12-19 | Intercooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009079669A1 true WO2009079669A1 (en) | 2009-06-25 |
Family
ID=39760999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ZA2007/000091 WO2009079669A1 (en) | 2007-12-19 | 2007-12-19 | Intercooler |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2009079669A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007054330A2 (en) * | 2005-11-10 | 2007-05-18 | Behr Gmbh & Co. Kg | Circulation system, mixing element |
| EP1854974A1 (en) * | 2006-05-13 | 2007-11-14 | Volkswagen Aktiengesellschaft | Combustion air intake system for an internal combustion engine |
| DE102006027117A1 (en) * | 2006-06-12 | 2007-12-13 | Robert Bosch Gmbh | Two-stage blower device for v-internal combustion engine, has two stages, which form exhaust-gas turbochargers, which are arranged laterally in internal combustion engine |
-
2007
- 2007-12-19 WO PCT/ZA2007/000091 patent/WO2009079669A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007054330A2 (en) * | 2005-11-10 | 2007-05-18 | Behr Gmbh & Co. Kg | Circulation system, mixing element |
| EP1854974A1 (en) * | 2006-05-13 | 2007-11-14 | Volkswagen Aktiengesellschaft | Combustion air intake system for an internal combustion engine |
| DE102006027117A1 (en) * | 2006-06-12 | 2007-12-13 | Robert Bosch Gmbh | Two-stage blower device for v-internal combustion engine, has two stages, which form exhaust-gas turbochargers, which are arranged laterally in internal combustion engine |
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