Exhaust recirculation system with elastic component

The invention relates to an exhaust recirculation system with an elastic component and belongs to the technical field of internal combustion engines. The exhaust recirculation system comprises a gas inlet pipe, an engine, an exhaust pipe, a connecting pipe, an volume cavity, a moving body and the elastic element, wherein the cross section of the volume cavity is in a rectangular shape, the moving body is arranged in the volume cavity and is in contact with the inner wall surface of the volume cavity in a sealed way, and the moving body is connected with the lower wall surface of the volume cavity through the elastic element. When the engine is in a high-speed work condition, the moving body upwards moves in the volume cavity, the exhaust recirculation rate is higher, the exhaust temperature is lower, and the integral performance of the engine is better. When the engine is in a low-speed work condition, the moving body downwards moves in the volume cavity, the exhaust regeneration rate is lower, the air intake is greater, and the integral performance of the engine is better. The exhaust recirculation system has the advantages that the design is reasonable, the structure is simple, and the exhaust recirculation system is applicable to the exhaust regeneration system of the engine.