Pneumatic tire

A pneumatic tire, tire circumferential technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problem of not achieving both handling stability and riding comfort.

Active Publication Date: 2019-12-13
TOYO TIRE & RUBBER CO LTD
View PDF30 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Document 5 describes a pneumatic tire in which patterns such as grooves and sipes on the tread portion are designed in order to balance contradictory performances, but it does not achieve both steering stability and riding comfort.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] One embodiment of the pneumatic tire of the present invention will be described below with reference to the drawings. In addition, in each drawing, the dimensional ratio on the drawing and the actual dimensional ratio do not necessarily match, and also the dimensional ratio among the drawings does not necessarily match.

[0029] figure 1 One embodiment of the tread portion 100 of the pneumatic tire of the present invention is shown. The tread portion 100 includes four main grooves 6 to 9 extending in the tire circumferential direction, and five land portions 1 to 5 divided by the main grooves 6 to 9 . In this embodiment, the installation orientation of the pneumatic tire relative to the vehicle is specified, and the five land portions 1 to 5 include: the inner shoulder land portion 1, the inner quarter land portion 2, the central land portion 3, and the outer quarter land portion. A land portion 4 and an outer shoulder land portion 5 . The outer shoulder land portion...

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

It is an object of the present invention to provide a pneumatic tire capable of improving the riding comfort performance while maintaining the steering stability performance. The pneumatic tire is characterized in that a mounting orientation to a vehicle is designated, and at least four land portions are included with respect to a tread portion. A total ground contact area of the outside shoulderland portion (5) and the outside quarter land portion (4) is larger than a total ground contact area of the inside quarter land portion and the inside shoulder land portion. The outside quarter land portion (2) has a first circumferential sipe (43) extending in a tire circumferential direction. On the first circumferential sipe (43), a chamfered first inclined surface portion (45) extending in thetire circumferential direction is provided between a vehicle outside inner wall of the first circumferential sipe (43) and s surface of the outside quarter land portion (4).

Description

technical field [0001] The present invention relates to a pneumatic tire including a tread portion. Background technique [0002] Conventionally, it is known that the ground contact pressure of the tread portion of a pneumatic tire is higher in the vehicle outer region facing the vehicle outer side based on the tire equator than in the vehicle inner region facing the vehicle inner side based on the tire equator when cornering. high. Therefore, in order to improve steering stability, it is necessary to increase the ground contact area of ​​the vehicle outer region of the pneumatic tire, or to set the rigidity of the tread portion high (see Patent Documents 1-4). [0003] However, if the ground contact area of ​​the tire is increased or the rigidity of the tread portion is set high, it becomes difficult for the tire to absorb the unevenness of the road surface, and the vibration and noise increase, resulting in a decrease in riding comfort. That is, it can be said that handl...

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 Applications(China)
IPC IPC(8): B60C11/03B60C11/13
CPCB60C11/03B60C11/13B60C2011/0341B60C11/0304B60C11/1236B60C11/1204B60C2011/1209B60C2011/0381B60C11/1392B60C11/0332B60C11/1323B60C2011/0388B60C11/1272B60C2011/1286B60C11/124
Inventor 宫崎哲二
Owner TOYO TIRE & RUBBER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap