| 摘要 |
<p>Provided is a pneumatic tyre tread which reduces tread pattern noise while effectively suppressing air column resonance produced by circumferential grooves. The pneumatic tyre tread according to the present invention is provided with circumferential grooves 2, ribs 3, and resonators for reducing air column resonance in the circumferential grooves; the resonators are provided with a number of sets of resonators 41, 42, each comprising at least two types of branch groove shapes; the length of the first branch grooves 41 is at least 40% of the length of the contact surface, and the groove width is between 10% and 25% of the groove width of the circumferential grooves, while the length of the second branch grooves 42 is between 40% and 90% of the length of the first branch grooves, and the groove width is no less than the groove width of the first branch grooves; the first openings and the second openings are alternately present on the same circumferential groove; the length between the openings in the first branch grooves is no more than 50% of the length of the contact surface; and the difference between the minimum cross-sectional void ratio in the ribs where the branch grooves are provided and the maximum cross-sectional void ratio is no greater than 10%.</p> |
