| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: engine comprises cylinder with partition that separates compression chamber from case, cylinder head, piston with relief valve installed on it, stem jointed to rocker, inlet valve installed on cylinder side surface and outlet valve installed in cylinder head. Piston is equipped with horizontal oil draining openings. Stop is installed in stem lower part in its junction with rocker. And vertical openings - air ducts - are installed circumferentially in piston head. ^ EFFECT: higher resource of engine operation. ^ 2 cl, 1 dwg
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