Cylinder head for a fuel injection internal combustion engine

Claim 1

A cylinder head for a compressed air and direct fuel injection internal combustion engine in which the injected fuel is spread on the wall of the combustion chamber comprising a head, two air intake valves lying on a line parallel to a line through the center of the engine cylinder, two exhaust valves, an air intake channel for each intake valve, an exhaust valves, an air intake channel for each intake valve, an exhaust gas channel for said exhaust valves, said intake channel and said exhaust gas channel, respectively, lying on opposite sides of said head and being approximately parallel to the bottom of said head, one intake channel extending tangentially to one intake valve for forming an intensive unidirectional air swirl around the center of said chamber, the other intake channel being started tangentially toward the other valve and then recurved toward said other valve to direct air through said other valve in the unidirectional direction, the distance (a) between said line (4) parallel to a line (3) through the center of the engine cylinder (1) being approximately 0.15 times the diameter (D) of the engine cylinder, a fuel nozzle bore (13) positioned off-center between the two intake channels (11,12), said bore being surrounded by a cooling water chamber (16), the point at which the fuel jet leaves the nozzle being spaced from the line (3) through the center of the engine cylinder a distance wherein D is the diameter of the engine cylinder, x the ratio of the piston stroke to the cylinder diameter and e the compression ratio, said intake channels together producing a flow of intake air into the engine cylinder in which, given a constant longitudinal air velocity in the engine cylinder of 10 m/sec, the ratio of the air rotation frequency, measured at a distance of 0.7 D, to the engine frequency is equal to five, and the velocity profile in radial direction lies between v constant and v/r constant, wherein v is the air velocity and r the engine cylinder radius, and whereby the air velocity in the cylinder equals the cylinder radius.