Patent ID: 8161953

Claim:
An internal combustion engine with a crankcase and a system for circulating lubricating oil, with a system for removal of condensed, blow-by contaminants from the circulating oil, the system comprising: a positive crankcase ventilation system for removal of gases and vapors from the crankcase; and a macroporous structure positioned in the oil circulation system and at least partially immersed in the circulating lubricating oil; the macroporous structure comprising a plurality of micro-porous particles of at least one alumino-silicate composition for selective, reversible adsorption of condensed blow-by contaminants from the lubricating oil; the structure adsorbing greater quantities of contaminant at lower temperatures than at higher temperatures so that contaminant adsorbed by the structure at a lower temperature may be released to the lubricating oil at a higher temperature; and vaporized at the higher temperature to release contaminant vapors into the crankcase for removal by the positive crankcase ventilation system.