Four-cycle engine designed as a flat engine for automatic pressure charging incorporates a ventilated crankcase, two compression-proof tightened cylinders with pistons acting on a crankshaft through four con-rods.

摘要

A four-cycle engine has a ventilated crankcase (26). Two compression-proof tightened cylinders (3) with pistons (4) acting on a crankshaft (2) through four con-rods (5) and a crank slide are fitted on two axles. Four con-rod guides (6) fitted as compression-proof on the crankcase form a charging chamber (21) together with an inner section of the cylinders and the pistons designed as hollow pistons.