Oil-gas separation device for internal combustion engine

The invention discloses an oil-gas separation device for an internal combustion engine, which comprises a casing with a cavity and an oil-gas mixer communicated with the casing and used for collecting oil mist, and the oil-gas mixer inputs the oil mist into the casing for oil-gas separation operation; according to the technology, efficient oil-gas separation is achieved through multiple separation procedures, self-adaptive adjustment and the enhancement effect of the adaptive adjustment. Large-particle oil mist can be effectively separated, and the oil mist separator has excellent separation efficiency on small-particle oil mist. The oil-gas separation device adopts the design of multiple separation procedures, and the oil-gas separation effect is improved. Each working procedure has a specific separation mechanism which comprises mutual cooperative work of mechanical collision, acceleration, convergence, rolling and the like, so that the overall separation performance is improved, and particularly, the oil m