Patent ID: 8800510
Filing Date: 2014-08-12
Classification: F01L,F02B

Abstract:
1. Internal combustion engine for a vehicle, comprising at least two cylinders, a moveably arranged piston being arranged in each cylinder in order to increase and decrease, respectively, a volume defined jointly by the cylinder and the piston, and a compressed-air tank ( 14 ) connected to at least one of said at least two cylinders, characterized in that said at least two cylinders comprises at least one working cylinder ( 2 ) and at least one compressor cylinder ( 3 ), the working cylinder ( 2 ) comprising a first inlet opening and a first inlet valve ( 6 ) arranged to open and close said first inlet opening, a first pneumatic inlet valve actuator ( 8 ) operating the first inlet valve ( 6 ), an outlet opening and an outlet valve ( 7 ) arranged to open and close said outlet opening, a pneumatic outlet valve actuator ( 9 ) operating said outlet valve ( 7 ), and a working piston ( 4 ) moveably arranged in the working cylinder ( 2 ), the compressor cylinder ( 3 ) comprising a first inlet opening and a first inlet valve ( 10 ) arranged to open and close said first inlet opening, an outlet opening and an outlet valve ( 11 ) arranged to open and close said outlet opening, and a compressor piston ( 5 ) moveably arranged in the compressor cylinder ( 3 ) and operatively connected to and operated by the working piston ( 4 ), the compressed-air tank ( 14 ) is connected to the outlet opening of the compressor cylinder ( 3 ) via a first compressed-air conduit ( 15 ), the internal combustion engine ( 1 ) also comprising a second compressed-air conduit ( 16 ) that extends from said first compressed-air conduit ( 15 ) and that comprise a first flow valve ( 17 ) arranged to open and close the fluid communication from said first compressed-air conduit ( 15 ) to said second compressed-air conduit ( 16 ), the first inlet valve actuator ( 8 ) and the outlet valve actuator ( 9 ) of the working cylinder ( 2 ) being connected to the second compressed-air conduit ( 16 ).