A muffler pneumatic valve assembly

Abstract

The invention aims to provide a silencer pneumatic valve assembly which comprises a pneumatic valve disk. A shaft sleeve which is through in the radial direction and is integrated with the pneumatic valve disk is arranged in the middle of the pneumatic valve disk; the shaft sleeve spaces the pneumatic valve disk into a left part and a right part; the silencer pneumatic valve assembly further comprises a supporting shaft penetrating through the shaft sleeve on the pneumatic valve disk, a thrust bearing, a limiting nut and a supporting shaft fastening nut, wherein the thrust bearing and the limiting nut are arranged at the two ends of the supporting shaft correspondingly; and the supporting shaft fastening nut is used for fixing the supporting shaft. According to the silencer pneumatic valve assembly, a pneumatic harmonic sound attenuation concept is applied for the first time, in the process of pushing the pneumatic valve disk to operate through the airflow, the high-speed pulse airflow bears hysteresis of the pneumatic valve disk due to the mass feature of the pneumatic valve disk, and the purposes of improving airflow pulse and decreasing noise are achieved.

Description

technical field [0001] The invention relates to an automobile engine exhaust muffler, in particular to a muffler pneumatic valve assembly. Background technique [0002] The muffler can be divided into traditional physical impedance compound muffler, mechanical dual-mode muffler, electronically controlled multi-mode muffler and active muffler structure according to its working principle and realization method. Widely used in all major models. Such as figure 1 As shown, the existing mechanical dual-mode muffler controls the opening of the mechanical valve 7 through a mechanical spring 8 to achieve the purpose of dynamically separating the airflow, thereby eliminating idle speed and low-speed noise, but the use of a mechanical spring to control the valve has the following defects: First of all, when the spring stiffness coefficient is constant, the valve resistance will inevitably increase the system back pressure and lose part of the engine performance; The attenuation of p...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the existing mechanical dual-mode muffler controls the opening of the mechanical valve 7 through a mechanical spring 8 to achieve the purpose of dynamically separating the airflow, thereby eliminating idle speed and low-speed noise, but the use of a mechanical spring to control the valve has the following defects: First of all, when the spring stiffness coefficient is constant, the valve resistance will inevitably increase the system back pressure and lose part of the engine performance; The attenuation of performance will increase the risk of subsequent reliability; again, the performance attenuation of springs in high-temperature environments is a congenital design defect, which can only be partially improved by improving the creep resistance and yield resistance of materials, but ultimately cannot eradicate

Images