Cylinder head for an internal-combustion engine with three valves for each cylinder and with a high pressure in the cylinder.

摘要

1. Cylinder head for an internal combustion engine with several cylinders, whose axes are contained in a longitudinal plane (L) each cylinder having two induction valves, each cooperating with an induction pipe (24) and an exhaust valve cooperating with an exhaust pipe (26), the induction pipes (24) being symmetrical to one another with respect to the diametral plane (D) of the cylinder (22) perpendicular to the longitudinal plane (L), the exhaust pipe (26) issuing onto the same lateral face (27) of the cylinder head (21) as the induction pipes (24) and at an intermediate level between that of the induction pipes (24) and the head gasket and the cylinder head (21) being fixed to the power unit level with each of the cylinders (22) by a plurality of screws distributed around the cylinder (22), characterized in that the exhaust pipes (26) issue onto the lateral face (27) of the cylinder head in positions laterally displaced with respect to the diametral plane (D) of symmetry of the corresponding induction pipes (24), the exhaust pipes (26) having axes (26a), whose projection on a plane (1a) parallel to the head gasket is curved and has its concavity turned towards the diametral plane (D) and a cylinder head fixing screw is positioned in the vicinity of the lateral face (27) of the cylinder head, with its axis following the diametral plane (D) of symmetry, in the space located within the concavity of the exhaust pipe (26).