The cylinder head (1) has a crank case side sealing surface (2) in which two combustion chamber roofs (4,4') are arranged and separated by a stud (3) whereby sealing surface has a bore (5) in stud area towards cylinder axis.

It is an object of the invention to provide an engine, which can be decreased in height while the strength of a cylinder head is ensured. An engine 11 according to the invention is constructed such that a cam chain 19 is trained around a sprocket 17 fixed ...

In a cylinder head structure of a multi-cylinder engine, a head-side water jacket (4) is provided in the cylinder head (1), a lateral rib (11) extending in the engine width direction is provided at an upper face of the portion (1d) located between cylinder...

The cylinder head has a well end wall (2) covering the camshaft drive well (7), in which there is a cooling water channel (4) extending from the cooling water inlet region to the cooling water outlet region. The well end wall may be formed integrally with ...

The cylinder head (10) has an under-surface (12) designed to fit on the engine cylinder block and an upper part (14) designed to be fitted with a cover and a made with a surface (22) to receive a crankcase gas decantation element. The head has an inner cha...

For each cylinder, the cylinder head unit has an intake valve (2), an outlet valve (3), first and second holder (7a,b) for an ignition device (8a,b), and a fuel injection unit. A third holder (7c) is for an injection unit (9c) or an ignition device. Intake...

A method and system for machining a cylinder head include loading a cylinder head into a first five axis computer numerically controlled (CNC) machine. A first fixture of the first CNC machine is then located against a top surface of the cylinder head such...

This cylinder head comprises intake and exhaust valves for controlling gas exchange in a combustion chamber of the cylinder head, which intake and exhaust valves are actuated by means of at least one camshaft. In order to create a cylinder head system enco...

In a cylinder head 1 has boss portions 8 for head bolts 11 which are formed inside of both sides of the cylinder head 1, and a discharge/intake port 5 which extends from an intermediate portion 15a of a lower-surface deck 15 that is in contact with a gaske...