Lubricating device for engine

A lubricating device for an engine, comprising:

• a crank chamber, a pressure in which varies as a piston moves up and down;
• an oil sump chamber which is disposed below the crank chamber to retain lubricating oil and is formed, in part, by an oil case disposed below the crank chamber;
• and
• a first partition wall which separates the crank chamber and the oil sump chamber;
• wherein:
• the first partition wall includes a first opening that provides communication between the crank chamber and the oil sump chamber;
• the crank chamber, the oil sump chamber and the first partition wall are configured such that gas, which is injected from the crank chamber into the oil sump chamber through the first opening when the crank chamber has a positive pressure, collides with oil in the oil sump chamber and generates oil mist in the oil sump chamber;
• the lubricating device further comprises an oil mist generation control barrier in the oil sump chamber that disperses the gas in the oil sump chamber or restricts the flow of oil in the oil sump chamber with which the gas collides, thereby controlling an amount of oil mist generated in the oil sump chamber;
• the oil case has a bottom;
• and
• the oil mist generation control barrier is a convex portion that stands upright on the bottom of the oil case.