ARRANGEMENT FOR A SUPERCHARGED COMBUSTION ENGINE CONCERNING COOLERS FOR INLET AIR TO AND EXHAUST GASES FROM THE ENGINE

• US 20110139131A1
• Filed: 06/03/2009
• Published: 06/16/2011
• Est. Priority Date: 06/09/2008
• Status: Abandoned Application

• Current Assignee: Scania CV AB (Volkswagen AG)
• Original Assignee: Scania CV AB (Volkswagen AG)
• Inventors: Kardos, Zoltan, Soderberg, Erik
• Application Number:
  US12/995,717
• Publication Number:
  US 20110139131A1
• Time in Patent Office: Days
• US Class Current: 123/542
• CPC Class Codes: F01P 2003/187 arranged in series
• CPC Class Codes: F01P 2060/02 Intercooler
• CPC Class Codes: F01P 3/12 Arrangements for cooling other engine or machine parts
• CPC Class Codes: F02B 29/0412 Multiple heat exchangers arranged in parallel or in series
• CPC Class Codes: F02B 29/0443 Layout of the coolant or refrigerant circuit
• CPC Class Codes: F02M 26/24 with two or more coolers
• CPC Class Codes: F02M 26/28 with liquid-cooled heat exchangers
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An arrangement for a supercharged combustion engine (2), including at least one compressor (6a, 6b) for compressing air in a first cooling system, the first cooling system having a first circulating coolant, a second cooling system with a second circulating coolant which during normal operation of the combustion engine is at a lower temperature than the first coolant in the first cooling system, at least one charge air cooler (9a, 9c) applied in the air inlet line (8) and being cooled by coolant from the second cooling system. The second cooling system includes a first radiator element (24) and a second radiator element (36) arranged in series with the first radiator element (24) in the second cooling system, so that at least part of the coolant which circulates in the second cooling system undergoes two steps of temperature lowering during a single round of circulation in the second cooling system.

Claims

1. An arrangement for a supercharged combustion engine (2), which arrangement comprises an inlet line (8) adapted to leading air at above atmospheric pressure to the combustion engine (2), at least one compressor (6a, 6b) adapted to compressing the air in the inlet line (8), a first cooling system with a circulating coolant, a second cooling system with a circulating coolant which during normal operation of the combustion engine is at a lower temperature than the coolant in the first cooling system, and at least one charge air cooler (9a, 9c) applied in the inlet line (8) and adapted to being cooled by coolant from the second cooling system, characterised in that the second cooling system comprises a first radiator element (24) and a second radiator element (36) arranged in series with the first radiator element (24) in the second cooling system so that at least part of the coolant which circulates in the second cooling system undergoes two steps of temperature lowering during a single round of circulation in the second cooling system.

2. An arrangement according to claim 1, characterised in that the coolant in the second cooling system is intended to be cooled in the first radiator element (24) by air.

3. An arrangement according to claim 1 or 2, characterised in that the coolant in the second cooling system is intended to be cooled in the second radiator element (36) by air at the temperature of the surroundings.

4. An arrangement according to claim 3, characterised in that the second cooling system comprises a first line (26a) with coolant which has been subjected to a first step of cooling by the first radiator element (24), and a second line (26i) with coolant which has been subjected to a second step of cooling by the second radiator element (36).

5. An arrangement according to any one of the foregoing claims, characterised in that the second cooling system comprises a line (26b) which leads coolant back, after use, to the first radiator element (24).

6. An arrangement according to any one of the foregoing claims, characterised in that the second cooling system comprises a line (26c) adapted to leading coolant to a first charge air cooler (9a), and a line (26d) adapted to leading coolant to a further charge air cooler (9c), which lines (26c, 26d) are arranged in parallel so that they lead coolant at substantially the same temperature to the respective charge air coolers (9a, 9c).

7. An arrangement according to any one of the foregoing claims, characterised in that the second cooling system comprises at least one line (26c, 26d) adapted to leading coolant to the charge air cooler (9a, 9c), and a line (26e-h) adapted to leading coolant to a cooler (14b, 35, 39, 40) in order to cool some other medium than air.

8. An arrangement according to any one of the foregoing claims, characterised in that the first cooling system is adapted to cooling the combustion engine (2).

9. An arrangement according to any one of the foregoing claims, characterised in that it comprises a return line (11) connecting the exhaust line (4) to the inlet line (8) to make it possible, via the return line (11), to recirculate exhaust gases from the exhaust line (4) to the inlet line (8).

10. An arrangement according to claim 9, characterised in that the return line (11) comprises an EGR cooler (14a) adapted to being cooled by coolant from the second cooling system.