PULLING PISTON ENGINE

摘要

A reciprocating piston engine of a crankshaft of a stroke S and connecting rods of a length L can afford an increase in the time available for the combustion of the fuel substantially equal to (1+S/2L) times the respective time available in the conventional engine, provided that the pistons are equipped with piston rods and the combustion takes place exclusively only under the piston crown underside. To form a closed space under the piston crown the engine has cylinder bottoms instead of cylinder heads and in order to achieve as compact a combustion chamber as in the contemporary conventional engines, the engine has under-bottom poppet valves to enjoy substantially the same advantages that the over-head valves afford to the conventional engines, because the piston rod cross section is only of an area A=P/f, where P is the force from the gas and f is the fatigue strength in substantial simple tension of the material of the piston rod and since no axial force is acting on cylinders they are considerably thin and light. An air flow directly towards the bore wall cools the oil film from within.