US 9,284,911 B2 · Engine combustion chamber structure, and inner wall structure of through channel

Abstract

Provided is an engine combustion chamber structure. Also provided is an inner wall structure for a through channel, through which exhaust gas or intake gas of the engine passes. An engine combustion engine structure is provided with a heat-insulating member on the inner wall of an engine constituent member which constitutes an engine combustion chamber, the heat-insulating member containing a heat-insulating porous layer formed from ceramics, and a surface dense layer formed on the surface of the heat-insulating porous layer and formed from ceramics. The surface dense layer of the heat-insulating member has an open porosity of 5% or less, and preferably the heat-insulating porous layer has a larger open porosity than the open porosity of the surface dense layer.

Claims15

Dependent claims

An engine combustion chamber structure, having a heat-insulating member comprising:

a heat-insulating porous ceramic layer on the inner walls of engine components, each constituting an engine combustion chamber;
and
a dense surface ceramic layer on a surface of said heat-insulating porous layer;
wherein a second bonding layer is provided between said inner walls of said engine component and said heat-insulating porous layer;
and
wherein the thermal expansion coefficient of the second bonding layer is an intermediate value between that of the heat-insulating porous layer and that of the inner walls of engine components, and the Young's modulus of the second bonding layer is lower than that of the heat-insulating porous layer and that of the engine components.

3 more elements

Dependencies are inferred from the claim text.

Engine combustion chamber structure, and inner wall structure of through channel

Life of this patent

Engine combustion chamber structure, and inner wall structure of through channel

Life of this patent

Abstract

Claims15