What is the role of air filter intake pipe?
The role of the air filter intake pipe is to effectively filter the dust and impurities in the air, so that the air purity into the combustion chamber increases, so as to ensure that the fuel is fully burned, and the air filter element becomes dirty, which will hinder the air passing through, reduce the intake volume of the engine, resulting in the engine power decline.
The function of the air filter resonator is to reduce the intake noise of the engine. The air filter is installed in front of the resonator, and the resonator is installed on the intake pipe with two more cavities, and the two are easy to identify.
Background technology: There is no doubt that noise has become a major public hazard affecting people's comfortable life, and the automobile industry is no exception. Major automobile manufacturers also pay great attention to the improvement of nvh performance of vehicles while ensuring other performance of vehicles. The noise of the intake system is one of the sources that affect the noise of the car, and the air filter as a portal for the air to enter the engine, on the one hand, it can filter the dust in the air to avoid the engine from abrasion and damage; On the other hand, the air filter, as an expansion muffler, has the effect of reducing the intake noise. Therefore, the noise reduction design of the air filter is very important.
Most of the air filter designs are simple cavity structures, generally using a single round pipe to enter and exit the air, there is no significant change in cross-section, so it can not effectively increase the acoustic impedance, so as to improve the noise reduction effect; In addition, the general air filter is installed on the battery and the front baffle by bolts, the installation point stiffness is generally weak, and most of them can not effectively reduce the intake noise, and some even take into account the noise, access the resonator in the intake pipe, but this occupies the small engine room space of its own layout space, which brings inconvenience to the layout.
Technical realization elements: The technical problem to be solved by the invention is to realize the structure of an automobile air filter that can improve the intake noise.
In order to realize the above purpose, the technical scheme adopted by the invention is: The automobile air filter structure comprises an air filter upper shell and an air filter lower shell, the air filter lower shell is provided with an air inlet chamber, a resonator chamber, a filter chamber and an outlet chamber, the air inlet chamber is provided with an air inlet port, the air outlet chamber is provided with an air filter outlet, the filter chamber is provided with a filter element, and the filter chamber is provided with a filter element. The air enters the air filter inlet and is discharged through the air filter outlet after the air filter inlet chamber, the resonator chamber, the filter chamber and the air outlet chamber in turn. The air inlet chamber is a pipe placed in the resonator chamber. One end of the air inlet chamber is an air filter inlet port, and the other end is provided with a connecting hole communicated with the resonator.
The cross-sectional area of the air intake chamber decreases from outside to inside.
The connecting hole is a circular hole with a diameter of 10mm.
The upper shell and lower shell of the air filter adopt pp-gf30, and the material thickness is set to 2.5mm.
The air inlet chamber is a straight pipe with a square cross section, and the air filter inlet end of the air inlet chamber extends a resonant cavity, and the middle of the air inlet chamber has a section of gradient decline from the outside to the inside.
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