Piston top providing structural unit

A piston top structural unit for an internal combustion engine may include a piston crown structure providing a top surface and a peripheral surface, wherein, regarding a center axis of the piston, the top surface is configured to delimit the piston top structural unit axially with respect to a combustion chamber of the internal combustion engine and the peripheral surface is configured to delimit the piston top structural unit radially. The top surface may include a rim surface extending around the center axis, and an inner surface delimiting a piston bowl radially within the peripheral surface. The inner surface may include an area of lowest positions of the piston bowl, a first side wall surface extending essentially along the direction of the center axis from a first border section of the area of the lowest positions to the rim surface, a deflecting bottom surface raising from a second border section of the area of the lowest positions to form an asymmetric piston bowl bottom, and at least one second side