Low thermal inertia integrated exhaust manifold

摘要

A non-metallic vehicle gas-directing component (10) includes a plurality of ceramic members (36) embedded within an inner surface. The ceramic members (36) extend into a passageway (34) to form a boundary layer between the flow of exhaust gas and exposed portions of the inner surface (32) to provide a highly heat resistant and lightweight passageway for directing a high temperature gas. A method for producing the vehicle gas-directing component includes temporarily attaching a plurality of ceramic members to an inner mold core during a lost core molding process. In one disclosed embodiment, the ceramic members are temporarily attached directly to the inner mold core by an adhesive. In another disclosed embodiment, the plurality of ceramic members are attached to an inner contour of a core casting cavity by an adhesive.