Abstract: The disclosure provides a piston crown for a piston mountable in a combustion cylinder of an internal combustion engine. The piston crown includes a top annular surface. Radially inside the top annular surface is a piston bowl for guiding fuel injected into the combustion cylinder. The piston bowl includes a frusto-conical lip chamfer surface at a throat of the piston bowl next to the annular surface. In diametric cross-section the lip chamfer surface has a radius of at least 30 mm, preferably 30 mm.

Abstract: A piston combustion bowl for a diesel engine is described. The piston may decrease the production of particulate matter during combustion of the fuel vapour in the combustion chamber. The piston may include a body having a crown about a central axis; a combustion chamber transversely disposed in the body and recessed from the crown; a centre pip disposed in the combustion chamber about the central axis; a bowl extending from the centre pip to a lip inclined relative to the crown at an angle; and a wall connected between the lip and the crown for limiting angular distribution of fuel vapour exiting the combustion chamber.

Abstract: A piston combustion bowl for a diesel engine is described. The piston may decrease the production of particulate matter during combustion of the fuel vapour in the combustion chamber. The piston may include a body having a crown about a central axis; a combustion chamber transversely disposed in the body and recessed from the crown; a centre pip disposed in the combustion chamber about the central axis; a bowl extending from the centre pip to a lip inclined relative to the crown at an angle; and a wall connected between the lip and the crown for limiting angular distribution of fuel vapour exiting the combustion chamber.