Patent ID: 8490392

Claim:
An arrangement for supplying compressed air to a supercharged combustion engine of a vehicle, the arrangement comprising: an inlet line configured to lead air at above atmospheric pressure to the combustion engine; a first compressor at the inlet line and configured to subject the air in the inlet line to a first compression step; a second compressor at the inlet line downstream in air flow direction from the first compressor and configured to subject the air in the inlet line to a second compression step; a first cooling system having a first circulating coolant circulating through the first cooling system; and a second cooling system having a second circulating coolant circulating through the second cooling system, the first cooling system and the second cooling system being configured and operable so that during normal operation of the combustion engine, the second coolant in the second cooling system is at a lower temperature than the first coolant in the first cooling system; a first charge air cooler applied at the inlet line at a location between the first compressor and the second compressor, and the first charge air cooler is configured, connected and operable to be cooled by the second coolant from the second cooling system; a second charge air cooler applied at the inlet line at a location downstream of the second compressor in the air flow direction of the inlet line and the second charge air cooler is configured and operable to be cooled by the first coolant from the first cooling system; and a third charge air cooler applied at the inlet line at a position downstream of the second charge air cooler in the air flow direction of the inlet line and the third charge air cooler is configured, connected and operable to be cooled by the second coolant from the second cooling system.