Patent ID: 8651093

Claim:
A sludge adhesion inhibiting structure for an internal combustion engine, comprising: a sludge inhibiting layer that inhibits generation or adhesion of sludge, the sludge inhibiting layer being formed on a surface of an area inside the internal combustion engine into which clean lubricating oil does not contact the surface of the area, the surface of the area being contacted by a blow-by gas and oil mist as a gas, wherein: the sludge inhibiting layer includes a liquid solution or a foaming solution with solid alkaline particles dispersed in the liquid solution or the foaming solution, the surface of the area is an inner surface of the area exposed to outside air, and the sludge inhibiting layer is configured to chemically neutralize an acid substance generated by reaction between condensed water generated on the surface of the area and NOx and SOx contained in the blow-by gas to inhibit generation or adhesion of the sludge.