Combustion chamber for a direct-injection supercharged combustion engine

A piston for an internal combustion engine, comprising:

• a body laterally delimited by a skirt configured to collaborate with walls of a cylinder of axis of revolution (C) in which the piston is configured to slide along the axis (C), the piston comprising a transverse face which comprises a central pip, a peripheral crown ring, and a bowl of axis of revolution (B) with a maximum depth (P), the bowl extending from the central pip toward the peripheral crown ring to which it is connected at a lip with a thickness (Ep),
• the bowl comprising a conical portion and, substantially in vertical alignment with the lip, a torus in profile, or half-dome shaped, with a radius (Rt),
• wherein the torus is situated at a distance (Db/2) from the axis of revolution (B) of the bowl, and the torus is configured to guide a fuel injected under the lip in a reentrance zone (R) toward the central pip,
• wherein the conical portion is between the central pip and the torus in profile,
• wherein a top of the pip situated on the axis of revolution (B) of the bowl rises up to a height that is a distance (Dt) of between 4.8 mm and 5.5 mm below the height of the peripheral crown ring, wherein the entire surface of the lip is parallel to the bowl axis of revolution, and wherein a distance between the lip and the axis (B) is less than a distance between the axis (B) and the peripheral crown ring,
• wherein a distance (Db) is between 52.5 mm and 56 mm, and wherein a ratio of the distance (Db) over the maximum depth (P) of the bowl is between 3.6 and 4.3.