SERIES OF UNIFIED INTERNAL COMBUSTION ENGINES Russian patent published in 1997 - IPC

FIELD: engine engineering. SUBSTANCE: series comprises engines of various working spaces defined by various combinations of sets of unified diameters and piston strokes. The engines have the same cylinder banks and unified inlet and outlet pipe lines. The heads of the cylinders of the engines of a series are unified and the pistons have grooves on their bottoms. The volume of the groove on the piston is equal to the difference between the ratio of the working volume to the compression ration, reduced by unity, and the volume of a portion of the combustion chamber of this cylinder arranged in the head of the cylinders. EFFECT: enhanced efficiency. 1 dwg