Supercharging system for two-stage supercharging of V-type internal combustion engines

• US 20080034752A1
• Filed: 06/12/2007
• Published: 02/14/2008
• Est. Priority Date: 06/12/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Becker, Bodo, Vogt, Guenther, Cocca, Oliver
• Granted Patent: US 7,703,284 B2
• Time in Patent Office: Days
• US Class Current: 60/599
• CPC Class Codes: F01N 13/107 More than one exhaust manifold or exhaust collector
• CPC Class Codes: F01N 13/143 with air filling the space between both walls
• CPC Class Codes: F02B 29/0412 Multiple heat exchangers arranged in parallel or in series
• CPC Class Codes: F02B 29/0418 the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface
• CPC Class Codes: F02B 37/001 using exhaust drives arranged in parallel
• CPC Class Codes: F02B 37/002 the exhaust supply to one of the exhaust drives can be interrupted
• CPC Class Codes: F02B 37/004 with exhaust drives arranged in series
• CPC Class Codes: F02B 37/013 with exhaust-driven pumps arranged in series
• CPC Class Codes: F02B 37/02 Gas passages between engine outlet and pump drive, e.g. reservoirs
• CPC Class Codes: F02B 37/162 by bypassing, e.g. partially, intake air from pump inlet to pump outlet
• 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 75/22 with cylinders in V, fan, or star arrangement
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A supercharging system, in particular an at least two-stage supercharging system, including a first stage and a second stage for an internal combustion engine having two cylinder banks. The at least two-stage supercharging system includes at least two charge air coolers. An exhaust gas turbocharger representing the first stage and an exhaust gas turbocharger representing the second stage are each situated next to one of the cylinder banks of the internal combustion engine.

Claims

1. A supercharging system for an internal combustion engine having two cylinder banks, comprising:

at least two charge air coolers;

a first exhaust gas turbocharger representing a first stage of the supercharging system; and

a second exhaust gas turbocharger representing a second stage of the supercharging system,

wherein each of the first and second exhaust gas turbochargers is situated next to one of the cylinder banks of the internal combustion engine.

2. The supercharging system according to claim 1, wherein the exhaust gas turbochargers each include a compressor part and a turbine part, and the turbine part of the second exhaust gas turbocharger is connected to an exhaust gas manifold via a connecting line.

3. The supercharging system according to claim 2, wherein the connecting line empties into the exhaust gas manifold downstream from a regulating device and upstream from the turbine part of the first exhaust gas turbocharger.

4. The supercharging system according to claim 1, wherein a first of the charge air coolers and a second of the charge air coolers are respectively situated in areas of an engine compartment of the internal combustion engine nearest to the cylinder banks.

5. The supercharging system according to claim 2, wherein the charge air coolers are situated in a series circuit, and further comprising a nonreturn valve representing a bypass, which is parallel-connected to the compressor part of the second exhaust gas turbocharger, situated therebetween.

6. The supercharging system according to claim 1, wherein the charge air coolers are situated in a parallel circuit, and the partial flows of fresh air passing through them are combined at a junction connected upstream from a throttle device.

7. The supercharging system according to claim 6, further comprising a first nonreturn valve situated upstream from the junction in a branch downstream from a first of the charge air coolers.

8. The supercharging system according to claim 6, further comprising a second nonreturn valve parallel-connected to a compressor part of the second exhaust gas turbocharger.

9. The supercharging system according to claim 2, wherein the exhaust gas turbochargers of the supercharging system are situated in an area of end faces of the internal combustion engine having two cylinder banks.

10. The supercharging system according to claim 2, wherein the connecting line and the exhaust gas manifold have a thermally insulated design and are designed as air gap insulated pipes.

11. The supercharging system according to claim 1, wherein the supercharging system is a two-stage supercharging system.