Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pneumatic tire

A technology for pneumatic tires and tires, which is applied in the direction of pneumatic tires, tire parts, tire treads/tread patterns, etc., which can solve the problems of reduced block rigidity and reduced handling stability on dry roads, so as to improve snow performance and improve Rigid effect

Active Publication Date: 2014-03-05
SUMITOMO RUBBER IND LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, increasing such a groove volume or the number of sipe formations causes a reduction in block rigidity, thereby reducing handling stability on dry roads (sometimes referred to as dry road handling stability), etc., snow performance and dry road handling stability. Sex is an exclusive relationship, so there is a problem of being able to reconcile both at a high level

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Prototype has figure 1 The basic pattern, and based on the specifications in Table 1, the tire size 205 / 55R16 non-studded tires for passenger cars, and the dry road handling stability and snow performance were tested, and the results are recorded in Table 1. Except for the swing width of the sipe and the pitch of the teeth, each tire has substantially the same specification.

[0054] (1) Dry road handling stability:

[0055] Using a vehicle with test tires mounted on all wheels under the following conditions, the steering stability (stability when changing lanes and cornering) when driving on a tire test course on a dry asphalt road was compared with a comparative example by the driver's senses. An index of 1 out of 100 was evaluated. The larger the index, the better.

[0056] Rim size: 16×6.5J

[0057] Internal pressure: 200kPa

[0058] Vehicle: Sedan (2000cc FR car)

[0059] (2) Snow performance:

[0060] Using the above-mentioned test vehicle, the steering st...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A pneumatic tire whose steering stability on dry roads is improved with minimizing lowering of on-snow performances and which has round shoulders and comprises tread portion (2) divided by circumferential main grooves (3) and lateral grooves (4) into blocks (5) provided with sipes (6) each having zigzag part (8), the circumferential grooves (3) including at least a pair of axially outermost circumferential grooves (3o) to divide the tread portion (2) into shoulder regions (Ysh) and crown region (Ycr), wherein the zigzag part (8) of sipes (6sh) disposed in the shoulder regions (Ysh) has a larger zigzag amplitude (Wsh) and a larger zigzag pitch (Psh) than zigzag amplitude (Wcr) and zigzag pitch (Pcr) of the zigzag part (8) of sipes (6cr) disposed in the crown region (Ycr), and angle (¸sh) of the sipes (6sh) with respect to the axial direction is smaller than angle (¸cr) of the sipes (6cr) with respect to the axial direction.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable for a studless tire, capable of suppressing a decrease in on-snow performance to a minimum and improving steering stability on a dry road surface. Background technique [0002] In pneumatic tires such as stud tires suitable for driving on icy and snowy roads, the tread portion is usually divided into a plurality of blocks by longitudinal main grooves extending in the tire circumferential direction and transverse grooves in the direction intersecting with them, and formed on each block. Multiple zigzag sipes. Then, the on-snow performance can be ensured by the shearing force of snow pillars or the like formed in the grooves, the corner effect of the blocks and the sipes, and the like. [0003] In addition, in order to improve the above-mentioned on-snow performance, it is known that it is preferable to increase the snow column shear force by increasing the groove volume and to increase the edge...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60C5/00B60C11/117B60C11/01
CPCB60C11/0304B60C11/12B60C2011/1227B60C2011/1213B60C11/1236B60C2011/1286
Inventor 景山尚纪
Owner SUMITOMO RUBBER IND LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com