Ventilation device for a crankcase of an internal combustion engine

Breathing device for a crankcase of an internal combustion engine, comprising:

• a cylinder head defining a cylinder head space communicating with the crankcase of the internal combustion engine;
• a balancing shaft rotatably arranged in said cylinder head space, said balancing shaft defining a gas-guiding space communicating the crankcase with an intake system of the internal combustion engine;
• at least one mass-balancing weight disposed on said balancing shaft,
• said at least one mass-balancing weight defining at least one oil discharging radial bore for discharging oil separated from a blow-by mixture flowing through the gas-guiding space, the at least one oil discharging radial bore communicating said gas-guiding space with said cylinder head space.

Breathing device for an internal combustion engine, comprising:

• a cylinder head defining a cylinder head space;
• a balancing shaft rotatably arranged in said cylinder head space, said balancing shaft defining a gas-guiding space communicating with an intake system of the internal combustion engine;
• at least one mass-balancing weight disposed on said balancing shaft,
• said at least one mass-balancing weight defining at least one oil discharging radial bore communicating said gas-guiding space with said cylinder head space,
• one of said balancing shaft and said at least one mass-balancing weight defining at least one axial feed bore communicating said cylinder head space with said at least one oil discharging radial bore.

Balancing shaft for an internal combustion engine, comprising:

• a balancing shaft defining a gas-guiding space to be communicated with an intake system of the internal combustion engine;
• at least one mass-balancing weight disposed on said balancing shaft,
• said at least one mass-balancing weight defining at least one oil discharging radial bore for communicating said gas-guiding space with a cylinder head space,
• one of said balancing shaft and said at least one mass-balancing weight defining at least one axial feed bore communicating said cylinder head space with said at least one oil discharging radial bore.