Patent ID: 7425119
Filing Date: 2008-09-16
Classification: F02B,F04D,H01L

Abstract:
1. A device to compress combustion air for a combustion engine of a motor vehicle, with a housing ( 12 ), with at least one compressor impeller ( 30 ) arranged in a compression area ( 28 ) of a first housing part ( 14 ), which is arranged in the flow direction between an air inlet ( 24 ) and an air outlet ( 43 ) of the housing ( 12 ), as well as with an electric motor ( 18 ) arranged in a second housing part ( 16 ) of the housing ( 12 ) to operate the compressor impeller ( 30 ), characterized in that a flow channel ( 42 ) running in the circumferential direction of the first housing part ( 12 ) and connecting the compression area ( 28 ) with the air outlet ( 43 ) surrounds the electric motor ( 18 ) at least partially in the axial direction, characterized in that the flow channel ( 42 ) is connectable with the air inlet ( 24 ) of the housing ( 12 ) by means ( 64 , 68 , 70 ) via a bypass channel ( 62 ) bypassing the compressor impeller ( 30 ), and characterized in that elastic means ( 70 ) are provided to open the bypass channel ( 62 ) with a deactivated electric motor ( 18 ).