Thermally conductive valve seat insert assembly
AssigneeFord Motor Company
InventorStephen G. Russ
Life of this patent
Estimating the term…
Abstract
A cylinder head in an internal combustion engine has a number of valve seat insert bores with a thermally conductive paste applied to an inner surface thereof. A valve seat insert is fitted into each cylinder head bore and the paste fills voids, or air gaps, along the contact surface between the inserts and the bores. The paste is made from a metal powder and a binder material which aggressively bonds to the metal powder, to the inserts and to the bores to form a thermally conductive solid material therebetween.
Claims17
A valve seat assembly for an internal combustion engine having a cylinder head with a plurality of valve seat insert bores therein, a plurality of valve seat inserts fitted into said plurality of bores, and a thermally conductive paste, comprised of a metal powder, between said bores and said inserts to fill voids therebetween.
A cylinder head for an internal combustion engine having a valve seat assembly comprising:
- a plurality of valve seat insert bores in the cylinder head;
- a thermally conductive paste on an inner surface of the plurality of bores, the paste comprising a metal powder with a ceramic based binder in an aqueous solution;
- and
- a plurality of valve seat inserts fitted into the plurality of bores such that the paste fills voids between the inserts and the bores.
A method for making a cylinder head for an internal combustion engine comprising the steps of:
- forming a plurality of valve seat insert bores in the cylinder head;
- applying a thermally conductive paste to an inner surface of the bores, the paste comprising a metal powder with a ceramic based binder in an aqueous solution;
- and
- fitting a plurality of valve seat inserts into the bores so that the paste fills voids between the inserts and the bores.
Dependencies are inferred from the claim text.