AN INTERNAL COMBUSTION ENGINE SYSTEM

The disclosure relates to an internal combustion engine (ICE) system (100) comprising a reciprocating compressor (120) for pressurizing a fluid medium and having a compressor cylinder (121) for accommodating a compressor piston (122), said compressor cylinder having a main cylinder volume (124) and a secondary adjustable volume (126) in fluid communication with the main cylinder volume so as to provide a variable geometrical compression ratio.