Engine parts and method of producing the same
AssigneeNGK Insulators, Ltd.
InventorsMinoru Matsui, Nobuo Tsuno
Life of this patent
Estimating the term…
Abstract
An engine part and a method of producing the same are disclosed. The engine part includes a ceramic member, a metallic member secured to the ceramic member, and a metallic engine part body fixed to the metallic member, wherein the outer peripheral portion of the metallic member has a diameter smaller than the outer diameter of the ceramic member and is provided at one end facing the ceramic member with an annular notch. The engine part is produced by securing the ceramic member to the metallic member through fitting or joining and then fixing the metallic member to the metallic engine part body through fitting or screwing.
Claims16
An internal combustion engine part comprising:
- a ceramic member having an outer peripheral portion with an outer diameter;
- a solid metallic member having an outer peripheral portion which has a diameter which is smaller than said outer diameter of the ceramic member;
- a metallic engine part body having an inner peripheral portion with an inner diameter, said outer peripheral portion of the solid metallic member being fixed to the inner peripheral portion of the metallic engine part and said solid metallic member fixing said ceramic member to the metallic engine part, said solid metallic member having an annular notch which is located at least partially on said outer peripheripal portion of said solid metallic member between said solid metallic member and said ceramic member.
An internal combustion engine part comprising:
- a ceramic member including a large diameter portion and a convex portion, said large diameter portion having an outer surface, an inner surface and an outer peripheral diameter, and said convex portion having an outer peripheral diameter;
- a solid metallic member having an outer peripheral portion which has a diameter which is smaller than said outer peripheral diameter of the large diameter portion of the ceramic member and an inner peripheral portion with an inner diameter, said outer peripheral diameter of the convex portion of the ceramic member being fixed to said inner peripheral portion of the solid metallic member, and said solid metallic member having an annular notch which is located at least partially on said outer peripheripal portion of the solid metallic member;
- and
- a metallic engine part body having an inner peripheral portion with an inner diameter, said outer peripheral portion of the solid metallic engine part being fixed to the inner peripheral portion of the metallic engine part, such that said annular notch in said solid metallic member creates a space located between said inner surface of the large diameter portion of the ceramic member, said solid metallic member and said inner peripheral portion of the metallic engine part.
A method of producing an internal combustion engine part by fixing a ceramic member to a metallic engine part body through a metallic member, comprising:
- securing a metallic member having a solid structure to said ceramic member, said metallic member having an outer peripheral diameter smaller than an outer diameter of said ceramic member, and being provided at an outer peripheripal portion thereof with an annular notch, such that said annular notch is located between said solid metallic member and said ceramic member;
- subjecting an outer peripheral portion of said metallic member to a finishing machining;
- and
- fixing the finished machined portion of said metallic member to a metallic engine part body.
Dependencies are inferred from the claim text.