Cylinder head

In a cylinder head for an internal combustion engine, having at least one receptacle socket, penetrating a cooling chamber, for a spark plug or an injection valve, which socket rests tightly at one end thereof, with a frusto-conical seating face, against a corresponding seating face of a seat on a lower cylinder head wall, and at its other end is retained in a cylinder head wall and pressed axially against the seat, the improvement wherein

• the seating face on the receptacle socket is a female cone and the corresponding seating face on the seat is embodied as a male cone, and the one end of the receptacle socket including a lowermost end surface exposed to coolant in the cooling chamber,
• whereby during operation of the engine, optical cooling of an injection valve nozzle or a spark plug igniting tip may be achieved due to the receptacle socket being surrounded by the flow of coolant not only over its entire length but also on its lowermost end surface.

In a cylinder head for an internal combustion engine including at least one cylindrical receptacle socket, penetrating a coolant-containing chamber, for a spark plug or injection valve, the socket having a frusto-conical seating face at one end thereof making tight engagement with a corresponding seating face on a lower cylinder head wall, and the socket having its opposite end retained in a cylinder head wall and pressed axially toward the corresponding seating face, the improvement comprising:

• said receptacle socket one end including a first annular surface defining a female cone and a second annular surface defining the lowermost end of said receptacle socket, and
• said corresponding seating face of said lower cylinder head wall including an annular surface defining a male cone and annular recessed means, surrounding said male cone, for exposing said receptacle socket second annular surface to coolant in said cooling chamber when said receptacle socket female cone is firmly seated on said male cone.