CRANKCHAMBER PRECOMPRESSION TYPE TWO-CYCLE INTERNAL COMBUSTION ENGINES

摘要

Twin cylinder two cycle engine including a pair of stepped cylinders and a pair of stepped pistons slidable in said cylinders defining annular spaces of variable volume in said cylinders. The pistons are interconnected each other with 180.degree. phase difference. Air-fuel mixture introduced into the annular space in one cylinder is forced into the crank-chamber of the other cylinder during the upward stroke of the associated piston, so that an additional charge is provided.