Low-noise pneumatic tire

Abstract

The invention discloses a low-noise pneumatic tire. The low-noise pneumatic tire is provided with a noise absorber mounted in a tire cavity, and the tire cavity is a closed space formed by the tire inner surface and a rim. The low-noise pneumatic tire is characterized in that the noise absorber is arranged in the tire cavity in the circumferential direction of the tire, and the noise absorber is provided with variational acoustic impedance in the circumferential direction of the tire; and the noise absorber takes the sound absorption material as a texture, and acoustic impedance is product ofspecific acoustic impedance of a sound absorption material and the superficial area of the sound absorption material. The low-noise pneumatic tire can effectively reduce total noise energy of cavity resonance, cavity resonance noise in the tire is better cut down, the sound absorption material utilization amount is reduced, the lightweight low-noise pneumatic tire can be manufactured, and the fuelconsumption and walk stability of an automobile are improved.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more particularly to a pneumatic tire capable of reducing cavity resonance noise in a tire cavity. Background technique [0002] Noise is an important indicator of the driving comfort of a passenger car. When the car is running, the cavity resonance sound generated by the cavity formed between the pneumatic tire and the rim is one of the important sources of car noise. The peak frequency of the cavity resonance sound is related to the size of the tire cavity. Generally, there is an obvious and sharp resonance peak between 150 and 250 Hz, which brings unpleasant feelings to the passengers in the car. In order to reduce noise, in the prior art, sound-absorbing materials with constant width and thickness are set along the tire circumferential direction; however, the resonance frequency of tires equipped with this type of sound-absorbing material is often a single value, which leads to noise energy It...

AI Technical Summary

Problems solved by technology

In order to reduce noise, in the prior art, sound-absorbing materials with constant width and thickness are set along the tire circumferential direction; however, the resonance frequency of tires equipped with this type of sound-absorbing material is often a single value, which leads to noise energy It is easy to concentrate in a narrow frequency range; therefore, in order to ensure the sound absorption effect, it is often necessary to arrange a large volume of sound-absorbing material

However, the bulky sound-absorbing material will reduce the heat dissipation of the tire, affect the durability of the tire, and further affect the fuel consumption and driving stability of the car

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