Abstract: An engine has a fuel supply system comprising a fuel pump provided with valves for opening and closing a fuel suction hole and a fuel exhaust hole alternately, synchronously with a movement of an air supply push rod, a pipe connecting the fuel suction hole of the fuel pump and a fuel supply source to each other; and a pipe connecting the fuel exhaust hole of the fuel pump and a fuel injection device provided on an air supply port of the cylinder to each other, wherein a fuel is fed to the fuel injection device from the fuel pump owing to an upward movement and a downward movement of the air supply push rod caused by a rotation of the crankshaft; and the air supply valve is opened to inject the fuel.

Abstract: A system equipped with elastic vibration absorbers whose elastic elements, capable of absorbing engine rotational vibrations, are placed and affixed between the supports of the engine main body along the same axis as that of the output axle and the structure for fastening the engine main body to the airframe, and with a vibration absorber-damper equipped with an arm affixed on the support of the engine main body and another arm coupled to the structure for fastening one of the aforementioned elastic vibration absorbers in such a way that these arms, separable and opposing, are positioned and pivoted at the axis of the output axle in a plane perpendicular to this axis, and with a damping member, installed between these arms, for absorbing engine vibrations and recoils occurring in the elastic bodies.