INTERNAL COMBUSTION ENGINE Russian patent published in 2004 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: proposed engine contains main combustion chamber, swirl-type precombustion chamber in form of solid of revolution coupled with main chamber by connecting channel, fuel nozzle installed in precombustion chamber, and piston with cylindrical projection with top in form of disk on bottom arranged in channel with ring clearance, projection being made of material with memorized shape effect. Iron and nickel-based alloy is used as such material. In non-heated condition at partial duties side surface of cylindrical projection increases in diameter. It has screw grooves. Helmet-shaped boss with point directed to nozzle spray tip is made on disk of cylindrical projection. EFFECT: reduced fuel consumption and toxicity of exhaust gases at partial duties. 3 cl, 2 dwg