A cylinder head for an internal-combustion engine comprises, for each cylinder of the engine, at least one intake duct (2) extending from an inlet located at a lateral face (3) of the head down to an outlet cylindrical mouth (5) opening out on a bottom fac...

The system a valve (36) with its extreme degree of opening controlled according to operating parameters of a combustion engine. The circumference (46) of an inlet orifice (32) associated to the valve has a notched angular sector (66) which extends on an ar...

In the present invention, there is provided a cylinder head in which seat rings, against which are placed intake valves, are mounted respectively on a plurality of intake ports that communicate with a combustion chamber of an internal combustion engine, an...

An internal combustion engine includes an intake port (5) leading to an engine cylinder (2). The intake port is divided into first and second passage section (5A,5B) by a partition (11) extending in the intake port in a longitudinal direction of the intake...

The cylinder head comprises an upstream (2) inlet conduit and a downstream inlet conduit both discharging in the cylinder head fire face (1a). The upstream admission conduit comprises a cavity (6) able to contain a valve seat (10) and acceleration and orie...

A direct-injection spark-ignition engine, comprising: a cylinder head (2) mounted on a cylinder plug (1) having an engine cylinder and a piston (3) defining a combustion chamber (4) by a cylinder wall of the cylinder plug (1), a bottom phase of the cylinde...