Multifunctional muffler structure

Abstract

The invention relates to a multifunctional muffler structure. The multifunctional muffler structure comprises a barrel body, an inner partition plate A, an inner partition plate B, an inner partition plate C and an inner partition plate D are arranged in the barrel body, and an air inlet muffler pipe, a middle muffler pipe and two air outlet muffler pipes are fixed in the barrel body; the four inner partition plates divide the barrel body into five muffler cavities. The air outlet muffler pipes are arranged symmetrically, so that exhaust back pressure is favorable for being reduced, and then the work efficiency of an engine is ensured; because siphons are arranged on the air outlet muffler pipes, water accumulating in a muffler can be eliminated by the utilization of the pressure difference between an inlet and an outlet of the muffler and on the basis of the siphon principle, the muffler is prevented from rusting, and the service life and the using reliability of the muffler are ensured; due to the combination of the multiple muffler cavities and the muffler components, exhaust noise is reduced substantially, and the riding comfort of a whole vehicle is improved; the application of a stamped shell makes the muffler be more beautiful and more elegant and fully show the feel of modern science and technology.

Description

technical field [0001] The invention belongs to the technical field of automobile exhaust mufflers, in particular to an exhaust muffler used for an urban SUV. Background technique [0002] The exhaust muffler of the off-road vehicle in the early stage adopts an impedance composite passive single tailpipe muffler. During the vehicle test, the exhaust back pressure at the rated power point (5200rpm) reached 65.3kPa, which exceeded the design value (≤60kPa) by 5.3kPa, and the idle speed condition (800rpm ) The exhaust port fixed noise is 63.2dB, which is 3.2dB higher than the target value (≤60dB). Moreover, there is a large amount of water inside the muffler, which requires high corrosion resistance of the muffler and seriously reduces the service life of the muffler. [0003] There are usually three ways to reduce exhaust noise: one is to design a very complex internal structure, such as designing Helmtz mufflers and quarter-wavelength tubes for different frequencies, and the...

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Problems solved by technology

Moreover, there is a large amount of water inside the muffler, which requires high corrosion resistance of the muffler and seriously reduces the service life of the muffler

[0003] There are usually three ways to reduce exhaust noise: one is to design a very complex internal structure, such as designing Helmtz mufflers and quarter-wavelength tubes for different frequencies, and the complex internal structure will make the air flow unobstructed, This will increase the back pressure of the exhaust system; the second is to increase the volume of the muffler, but due to the limitation of the vehicle layout space, the volume of the muffler cannot be increased; the third is to use a valve type muffler, that is, to add valves inside the muffler, but this method It is easy to cause discontinuous discharge of air inside the muffler, resulting in a "popping" sound, which affects the sound quality

[0004] There are three traditional solutions to the problem of water accumulation in the muffler affecting the life of the muffler: one is to add a siphon inside the muffler, but the siphon cannot completely remove the water; the other is to add a drain hole to the lower shell of the muffler. Empty the accumulated water, but after a long time, the muffler is prone to rust along the periphery of the water discharge hole, and at the same time, yellow water marks appear beside the water discharge hole, which seriously affects the appearance. In addition, the design of the water discharge hole may easily cause the screaming sound of the muffler; the third is to use For materials with high corrosion resistance, such as SUS436, SUS439 or even SUS441, the cost of the muffler will increase too much, which will bring certain pressure on the marketing of the whole vehicle

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