an intake muffler

Abstract

The invention discloses an air intake silencer. The air intake silencer comprises at least one annular silencing unit which is sequentially arranged in the axial direction of an air intake pipe; each silencing unit comprises an annular outer shell, a first baffle, a second baffle and a through hole formed in the wall of the air intake pipe of an engine; the surface of the air intake pipe of the engine is sleeved with the annular outer shell, the first baffle and the second baffle are installed between the annular outer shell and the air intake pipe in the radial direction, and a cavity is jointly formed by the two baffles and the annular outer shell; and the cavity is communicated with the air intake pipe of the engine through a through hole. According to the air intake silencer, the multiple silencing units are designed to be circumferentially distributed around the air intake pipe, the silencing frequency of the silencing units can be flexibly adjusted, and the target noise peak value can be eliminated; and in addition, the structure is compact, the size of the air intake silencer of the engine is reduced, and compact arrangement of all components in an engine compartment is easily achieved.

Description

technical field [0001] The invention relates to an engine intake system, in particular to an intake muffler. Background technique [0002] The industry in modern society is increasingly developed, the power of machines continues to increase, and the number of construction machinery has increased significantly. Accompanying it is that noise pollution is becoming more and more common and serious. From the perspective of the development direction of the engine industry, noise is the key technical indicator of engine product competition. In internal combustion engines, if no muffler is installed, the sound pressure level of exhaust noise is the highest, followed by intake noise. With the improvement of living standards, more and more people pay more and more attention to the problem of noise pollution. Intake noise is one of the main sound sources of engine noise, and with the increase of internal combustion engine speed and strengthening degree, the general application of turb...

AI Technical Summary

Problems solved by technology

However, as the layout of the engine compartment becomes more and more compact, in the intake system with limited space, the traditional Helmtz and 1 / 4 wavelength tube intake mufflers often have disadvantages such as large number, large volume, and unsightly appearance. Restricting the NVH performance of the engine

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