Heat conducting shield for cylinder heads of internal combustion engines

In combination, a cylinder head including a side which faces an interior of an engine cylinder for internal combustion engines having a combustion chamber with the interior relative to which at least two gas change ports with centers are provided with valve seat rings at combustion chamber end of the ports, a valve bridge portion between the valve seat rings having outer faces;

• a heat conducting shield including cylinder head wall members readily subjected to efficient cooling for shielding only the valve bridge portion provided between at least the two gas change ports, said heat conducting shield including the wall members being located on that side of the cylinder head which faces the interior of the cylinder, and said heat conducting shield being provided with a cutout portion for forming an enclosed insulating hollow space between said heat conducting shield including the wall members and said side cylinder head which faces the interior of the cylinder, said head conducting shield being in full contact with the cylinder head in the area of said cylinder head wall members which can be readily cooled wherein said cutout portion includes a recess which in turn includes a longitudinal groove extending with its longitudinal axis in a direction normal to and beyond that of a line intersecting centers of said at least two valve ports.