Combustion engine cylinder head intake duct and method of manufacture
AssigneeRENAULT s.a.s.
InventorsLaurence Mamy, Thierry Perroquin
Life of this patent
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Abstract
An intake duct cast as a recess in a combustion engine cylinder head that opens into a combustion chamber thereof at its lower end via an annular valve-seat housing. The intake duct, over part of its length, includes a substantially planar underside connected to the housing via a transition region that defines a shrinkage void of rounded shape within the mass of the cylinder head.
Claims11
1-10. (canceled)
An intake duct cast as a recess in a combustion engine cylinder head and that opens into a combustion chamber of the engine at its lower end via an annular valve seat housing, comprising:
- over part of a length of the intake duct, a substantially planar lower face connected to the housing by a rounded transition zone that continues toward the center of the duct and delineates a void of rounded shape, within the mass of the cylinder head, which follows on therefrom in a direction of the valve seat.
A method of manufacturing a combustion engine cylinder head, comprising:
- casting the cylinder head, defining at least an as-cast intake duct with a planar lower face connecting to an annular valve seat housing by a rounded connecting zone that continues towards the inside of the duct;
- and
- sizing the duct at its lower end.
Dependencies are inferred from the claim text.