Internal combustion engine and internal combustion engine system

Abstract

An internal combustion engine includes a pump, an oil filter, a supply channel, a return channel, a soot separation unit and a relief valve. The pump discharges oil and the oil filter filters the oil discharged from the pump. The supply channel extends from the pump through the oil filter, and the return channel branches off from the supply channel. The soot separation unit collects soot contained in the oil in the return channel. The relief valve is provided in the return channel, and causes, by opening itself, the oil that has entered the return channel as a split flow to flow through the soot separation unit.

Dependencies are inferred from the claim text.