FIELD: thermal engineering. SUBSTANCE: use is made of sequence of processes involved in known operating procedure of internal-combustion engines, novelty being that piston position at the moment of interruption of working medium admission is chosen from range of its positions between two design points, the first one being determined proceeding from maximum filling of cylinder working volume and second one, depending on geometric compression ratio of working medium inside engine chosen proceeding from desire of obtaining positive effect. EFFECT: improved thermodynamic efficiency four-stroke internal-combustion engine. 2 cl, 3 dwg
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