The utility model relates to the technical field of
internal combustion engine, especially relates to engine
crankcase ventilation technology, concretely is a kind of
gas engine respirator, including main cavity, gas leakage inlet and valve body, gas outlet, rotary vane separator, coarse filter water absorber, filter layer, exhaust port. Rotary vane separator, it is set in the main cavity, close to the gas leakage inlet position;Coarse filter water absorber, it is set in the upper portion of rotary vane separator;Filter layer, it is set the upper portion of coarse filter water absorber;Exhaust port, it is set in the upper portion of the main cavity, and set explosion-proof valve. Filter part has adopted three-stage
filtration, has strengthened the separation of
respirator to oil drop, wherein coarse filter water absorber can reduce the
moisture in the recovered
gasoline oil drop, reduce emulsification. The exhaust port of additional setting is equipped with explosion-proof valve, when abnormal situation appears, the pressure in the exhaler is too high, will gas leakage
discharge to the air in high place, improves safety.