Hot fluid expansion engine (600) comprising a plurality of actuation modules (100) arranged in a star pattern around a central shaft (610), each module (100) comprising: - a motor piston (110) delimiting in a first chamber (111) a variable volume working c...

The invention provides a crank circular slider mechanism comprising multi-row reciprocating motion part and one-row reciprocating part:the multi-row reciprocating motion part has a guiding part which is divided by a longitudinal groove into two rows parall...