FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: proposed engine contains cylinder, liner, piston, stepped output shaft whose one step is connected with piston by means of axle. Spring rests by one of its on output shaft. According to invention, step of output shaft connected with piston is made in form of cup whose walls enclose the piston. Through radial channel is made in walls of cup. Said channel communicates with intake space of engine. End face of cup is made in form of curvilinear surface. Two antifriction bearings are installed on each of opposite ends of axle connecting piston with shaft. Bearings, inner relative to piston, rest on curvilinear surface of end face of output shaft, and outer bearings are arranged in rectangular guide grooves made on cylindrical insert of engine housing. Second end of spring is secured on above-indicated axle.
EFFECT: improved reliability of engine.
2 cl, 4 dwg
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