HEAT-INSULATING STRUCTURE OF MEMBER FACING ENGINE COMBUSTION CHAMBER, AND PROCESS FOR PRODUCING SAME

摘要

A heat-insulating layer exhibiting high resistance to cracks, peeling, deformation, and gasoline and high heat insulation is obtained on the wall surface of an engine member (19). First, a heat insulator layer including a silicone-based resin and hollow particles containing a Si-based oxide is formed on a wall surface of the engine member (19). Then, Si-based oxide is produced through oxidation of a silicone-based resin in at least part of the surface of the heat insulator layer by heating the surface of the heat insulator layer. Thereafter, a catalytic metal is added to the silicone-based resin in the surface of the heat insulator layer and/or Si-based oxide derived from the hollow particles. Using the catalytic metal as nuclei, electroless plating is performed. In this manner, a heat-insulating layer (21) in which the surface of the heat-insulating film (27) is covered with a plating film (29) is obtained.

主权项

1. A heat-insulating structure of a member facing an engine combustion chamber, the heat-insulating structure comprising:
a heat-insulating layer including a silicone-based resin and hollow particles and located on a combustion chamber wall surface of the member facing the engine combustion chamber, wherein the hollow particles contain a Si-based oxide, the heat-insulating layer includes a base layer in which the hollow particles are dispersed in a base material of the silicone-based resin and also includes a surface layer containing SiO2 or a plating film on the base layer, and the silicone-based resin has a three-dimensional structure.