The invention discloses a rotary gas valve control mechanism and belongs to the technical field of
mechanical design. The rotary gas valve control mechanism comprises a
gas compressor, an engine, a
turbine, connecting pipes, a
valve seat, a valve body, a rotary shaft, an accommodating cavity, a rotator and an
elastic component, wherein the rotator is mounted in the accommodating cavity and is in sealed contact with the inner wall face of the accommodating cavity, the lower wall face of the rotator is connected with the lower wall face of the accommodating cavity through the
elastic component, two ends of a first connecting
pipe are communicated with gas inlets of an engine
exhaust pipe and an accommodating chamber respectively, and two ends of a third connecting
pipe are communicated with the engine
exhaust pipe and the upper wall face of the accommodating cavity. When the engine
exhaust pipe is high in pressure, the rotator drives the valve body to rotate
clockwise,
exhaust gas recirculation rate of the engine is large, and the engine is low in explosion pressure; and when the engine exhaust
pipe is low in pressure, the rotator drives the valve body to rotate anticlockwise, the
exhaust gas recirculation rate of the engine is small, and
oil consumption of the engine is low. The rotary gas valve control mechanism is reasonable in design, simple in structure and applicable to an
exhaust gas recirculation
system of the supercharged engine.