Spring clamp structure for improving NVH (Noise, Vibration and Harshness) characteristics of corrugated pipe of automobile exhaust system

Abstract

The invention discloses a spring clamp structure for improving the NVH (Noise, Vibration and Harshness) characteristics of a corrugated pipe of an automobile exhaust system. The spring clamp structure comprises an exhaust system corrugated pipe, wherein the exhaust system corrugated pipe comprises an inner layer flexible joint, a middle layer corrugated pipe and an outer layer mesh; the middle layer corrugated pipe and the outer layer mesh are clamped and fixed into a whole body by the inner layer flexible joint through end rings at the two ends of the inner layer flexible joint; the outer layer mesh is tightly pressed on the middle layer corrugated pipe through a spring clamp which is sleeved on the outer layer of the outer layer mesh. According to the spring clamp structure, the spring clamp structure sleeves on the outer layer mesh, the outer layer mesh is tightly pressed on the surface of the middle corrugated pipe, and two adjacent fixing points for tightly pressing the outer layer mesh and the middle corrugated pipe are kept within 150 mm as much as possible, so that collision of the outer layer mesh and the middle corrugated pipe is prevented from being produced in high-frequency vibration, and abnormal noise produced by the collision is avoided; the spring clamp structure is a simple structure with reliable performance for improving the NVH characteristics of the corrugated pipe of the automobile exhaust system.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a spring clip structure for improving the NVH characteristics of bellows of an automobile exhaust system. Background technique [0002] One end of the exhaust system of a car is connected to the engine, and the other end is connected to the underbody of the vehicle body. The vibration generated by the engine is transmitted to the vehicle body through the exhaust system and then to the driver's cabin, which has a bad impact on the ride comfort; The vibration of the vehicle body is transmitted to the engine through the exhaust system, which has an adverse effect on the engine. [0003] In order to improve the above problems, an exhaust system bellows is often installed at the part where the exhaust system is connected to the engine to isolate two-way vibration. The bellows of the exhaust system are mainly composed of an inner flexible joint, an intermediate bellows and an oute...

AI Technical Summary

Problems solved by technology

Since the outer net sleeve is relatively loose, it is only connected to the middle bellows by the end ring. If the exhaust system bellows are long, collisions are likely to occur in high-frequency vibrations, which will cause abnormal noise and seriously affect the NVH of the vehicle. performance

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