Tire noise reducing system
AssigneeSumitomo Rubber Industries, Ltd.
InventorsNaoki Yukawa, Masami Nishikawa, Tokuzo Nakajima, Chieko Aoki, Hideaki Sugihara
Life of this patent
Estimating the term…
Abstract
A tire noise reducing system includes a pneumatic tire, a wheel rim and a noise damper disposed in a cavity formed between the rim and tire the noise damper is made of a porous material having a specific gravity of from 0.005 to 0.06 and secured on a surface facing the cavity, the volume S2 of the noise damper is in a range of from 0.4 to 20.0% of the volume S1 of the cavity. Preferably, the noise damper is provided with an uneven surface or an outer layer for less sound reflection, and the shape index E of the noise damper is more than 1, and the ratio T/W of the thickness T to the width W of the damper is not less than 1.
Claims9
A tire noise reducing system comprising:
- a pneumatic tire,
- a wheel rim on which the pneumatic tire is mounted, and
- a noise damper disposed in a cavity, the cavity formed between the rim and tire when mounted so as to be surrounded by the tire and rim,
- the noise damper being made of a porous material having a specific gravity of from 0.005 to 0.06 and secured on a surface facing the cavity, and having a volume in a range of from 0.4 to 20.0% of the volume of the cavity,
- wherein the wheel rim comprises a pair of bead seats and a well for tire mounting formed between the bead seats, and
- the noise damper is secured to the well.
A wheel rim comprising
- a pair of bead seats, and
- a well for tire mounting formed between the bead seats,
- said well provided in the bottom with a shelter groove and a noise damper secured in the shelter groove,
- the shelter groove extending continuously or discontinuously in the circumferential direction, and
- the noise damper made of a porous material having a specific gravity of from 0.005 to 0.06.
Dependencies are inferred from the claim text.