FIELD: engine building.
SUBSTANCE: invention can be used in internal combustion engines. A piston is intended for an internal combustion engine, in particular for a gas-diesel internal combustion engine with a system of direct high-pressure fuel injection. The piston includes cavity (12) in the bottom of the piston, and a certain number of stages (14, 16). Cavity (12) in the bottom of the piston has an omega-shaped cavity. Plane (18) of a piston head is made in the form of a ring around the central axis (M) of piston (10). Stages (14, 16) are made in the form of a ring around the central axis (M) and are located between plane (18) of the piston head and cavity (12) in the bottom of the piston. Stages (14, 16) include one radially inner stage (14) and one radially outer stage (16). Radially outer stage (16), in a radial direction relatively to the central axis (M), passes to radially inner stage (14). Radially inner stage (14), above contour (24) of a jet splitter, made in the form of a ring around the central axis (M), passes to cavity (12). Alternatively, radially outer stage (16), in particular, a rounded one, passes to plane (18) of the piston head. At the same time, contour (24) of the jet splitter is made in the form of a protrusion protruding radially relatively to the central axis (M). Alternatively, preliminary set radius (R3) in the range from more than 0 to 30 mm, in particular from 1 to 10 mm, preferably from 2 to 6 mm, is provided for contour (24) of the jet splitter. Alternatively, contour (24) of the jet splitter at a site of contour (24), radially closest to the center, sets inner diameter (D1), a value of which is in the range from 40 to 100%, in particular from 40 to 80%, preferably from 40 to 60%, of outer diameter (D0) of piston (10). Alternatively, contour (24) of the jet splitter, in the axial direction along the central axis (M), is deepened compared to plane (18) of the piston head to a value in the range from 0 to 60%, in particular from 0 to 20%, preferably from 2 to 10% of maximum depth (H0) of cavity (12) in the bottom of the piston. Options of the implementation of pistons, an internal combustion engine, and a vehicle are disclosed.
EFFECT: increase in the efficiency of an engine with simultaneous reduction in exhaust gas emission.
12 cl, 5 dwg
