Patent ID: 6443122
Filing Date: 2002-09-03
Classification: F02B,F02F,Y02T

Abstract:
An internal combustion engine, comprising:a cylinder block with at least one cylinder chamber, a piston movable in the cylinder chamber, a cylinder head, and, in the cylinder head at least one exhaust channel having an openable and closable outlet from the cylinder chamber and at least one inlet channel having an openable and closable inlet valve to the cylinder chamber, said inlet forming an angle relative to the direction of movement of the piston, at least one spark plug protruding into the cylinder chamber, and a fuel injector, arranged to inject fuel directly into the cylinder chamber in a direction oblique to the direction of movement of the piston, said piston having a top with a surface portion forming an angle with a plane normal to the direction of movement of the piston and connected to a bowl-shaped cavity, which, together with said surface portion, is disposed to impart air flowing into the cylinder chamber a vortical movement about an axis perpendicular to the direction of movement of the piston, wherein the angle (&ggr;) between said surface portion (16) and said plane normal to the direction of movement (1) of the piston (15), and the angle (&agr;) between the mouth (5) of the inlet channel and the direction of movement of the piston are so selected in relation to each other and to the direction of movement of the piston that, during predetermined operating conditions, the inlet air flowing into the cylinder chamber (3) outside the piston cavity is imparted a primary vortical movement (v1) about an axis perpendicular to the direction of movement of the piston, said primary vortical movement generating a secondary vortical movement (v2) in the opposite direction in the piston cavity (19), said secondary vortical movement also being about an axis perpendicular to the direction of movement of the piston.