CN114537050A - Tire tread structure for improving rolling resistance, application and tire - Google Patents
Tire tread structure for improving rolling resistance, application and tire Download PDFInfo
- Publication number
- CN114537050A CN114537050A CN202210092343.XA CN202210092343A CN114537050A CN 114537050 A CN114537050 A CN 114537050A CN 202210092343 A CN202210092343 A CN 202210092343A CN 114537050 A CN114537050 A CN 114537050A
- Authority
- CN
- China
- Prior art keywords
- tire
- tread
- crown
- rolling resistance
- shoulder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 37
- 150000001875 compounds Chemical class 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims description 20
- 239000005060 rubber Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 16
- 239000000446 fuel Substances 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
- B60C2011/0016—Physical properties or dimensions
- B60C2011/0025—Modulus or tan delta
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
- B60C2011/0016—Physical properties or dimensions
- B60C2011/0033—Thickness of the tread
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention relates to the technical field of passenger tires, in particular to a tire tread structure for improving rolling resistance, application and a tire. A tire tread structure for improving rolling resistance, the tread structure comprising a crown, shoulders and a base tread, the base tread having a gum thickness of h1, the crown having a gum thickness of h2, h1/h2= 0.10-0.35; the crown sectional area is S1, the shoulder sectional area is S2, and S1/S2= 2-8.5; the 100% tensile modulus of the compounds for the base, crown and shoulder of the tread are respectively: 1.8-2.2, 2.0-5.0 and 2.0-3.0 MPa. The tread structure can effectively reduce the rolling resistance, and meanwhile, the safety of the tire (the volume of the tire material is not reduced) and the wet land holding force (the hysteresis loss of the tread material is not reduced) are kept.
Description
Technical Field
The invention relates to the technical field of passenger tires, in particular to a tire tread structure for improving rolling resistance, application and a tire.
Background
The rapid development of the automobile industry has brought a great pressure to the environment, and the emphasis on fuel saving and environmental protection has been placed on governments, automobile manufacturers and automobile users. The fuel economy of a vehicle is not only related to the fuel economy of an engine, but also has a large relationship with the rolling resistance of tires. Studies have shown that 14% to 20% of passenger car fuel consumption is due to tire rolling resistance. The low rolling resistance tire can effectively reduce the oil consumption of the vehicle and reduce the environmental pollution.
The market share of domestic electric vehicles is increasing year by year in recent years. Compared with fuel vehicles, the electric vehicle also puts higher demands on the rolling resistance of tires due to the requirement on cruising ability. The low rolling resistance tire has important significance as a market admission condition and domestic energy conservation and emission reduction.
The viscoelastic properties of the rubber polymer material determine the desynchronization of its stress strain, also known as hysteresis loss. The rolling resistance of a tyre is mainly due to the energy dissipation caused by the periodic deformation of the rubber and reinforcing materials in a rolling tyre, which is converted into thermal energy.
Dynamic resistance is defined as follows: energy loss per unit mileage (W ═ n.m)/m- > N; coefficient of rolling resistance: the ratio of the rolling resistance to the test is N/kN-o. RR ═ pi Vtan δ ≈ σ d ∈ RR rolling resistance, σ is stress, ε is strain, V is tire volume, and tan δ is a material hysteresis loss tangent value. The way to reduce the rolling resistance of a tire is to reduce the volume of the material, the hysteresis loss of the material and the strain energy density.
The existing solution is not enough:
1) the material volume is reduced (weight reduction of the tire). The reduction in size of the tire assembly after its thickness necessarily partially impairs safety;
2) the hysteresis loss of the material is reduced. Wet grip and wear can be negatively affected to varying degrees due to limitations in material properties.
How to reduce the rolling resistance while maintaining other performances of the tire is a difficult problem to be faced by each tire manufacturer.
Disclosure of Invention
In order to solve the above-described technical problems, an object of the present invention is to provide a tire tread structure for improving rolling resistance, which can effectively reduce rolling resistance while maintaining the safety of the tire (the volume of the tire material is not reduced) and wet grip (the hysteresis loss of the tread material is not reduced).
In order to achieve the purpose, the invention adopts the following technical scheme:
a tire tread structure for improving rolling resistance, the tread structure comprising a crown, shoulders and a base tread, the base tread having a gum thickness of h1, the crown having a gum thickness of h2, h1/h2 being 0.10-0.35; the cross-sectional area of the crown is S1, the cross-sectional area of the shoulder is S2, and S1/S2 is 2-8.5; the 100% tensile modulus of the compounds for the base, crown and shoulder of the tread are respectively: 1.8-2.2, 2.0-5.0 and 2.0-3.0 MPa.
Preferably, h1/h2 is 0.2-0.3
Still more preferably, h1/h2 is 0.3.
Preferably, S1/S2 is 2.5-4.0; the 100% tensile modulus of the rubber compound of the base, the crown and the tire shoulder of the tire tread is respectively as follows: 1.8-2.2, 3.5-5.0, 2.2-3.0Mpa
More preferably, the S1/S2 is 2.53, and the 100% tensile modulus of the cap and shoulder compounds is 4.85 Mpa, 2.21Mpa, respectively.
Further, the invention also discloses application of the tread structure in improving the rolling resistance of the tire.
Further, the invention also discloses a tire for improving the rolling resistance, which comprises a tire crown, a tire shoulder, a tire tread base, a nylon belt ply, a steel belt ply, a tire side, a tire cord layer, an inner liner, a bead filler and a steel wire ring; the crown, the shoulder and the tread base are the crown, the shoulder and the tread base in the tread structure.
The method is based on the finite element simulation analysis, and the strain energy density of the tire tread part is analyzed. According to the main deformation of the crown part and the tire shoulder part, namely compression deformation and bending deformation, the tire tread is divided into 3 parts, namely the crown of the central part and the tire shoulder of two side parts. By matching the size and modulus of the crown/shoulder component, the strain (holding stress) of the crown part is reduced, the stress (holding strain) of the shoulder part is reduced, and the strain energy density ^ sigma d epsilon of the whole tread part is reduced, so that the rolling resistance of the whole tire is reduced.
Drawings
FIG. 1 is a schematic view of a prior art tire.
Fig. 2 is a schematic structural view of the tire of the present invention.
FIG. 3 is a schematic view showing the bending deformation of the shoulder portion.
FIG. 4 is a schematic view of the compression deformation of the flower blocks in the central portion of the crown.
FIG. 5 is a strain energy density finite element simulation analysis of a prior art tire.
FIG. 6 is a result of a strain energy density finite element simulation analysis of a tire of the present invention.
Detailed description of the invention
The following describes a detailed embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 2, the passenger tire includes a crown 1, shoulders 2, a tread base 3, a nylon belt 4, a steel belt 5, sidewalls 6, a ply 7, an inner liner 8, a bead filler 9, and a bead ring 10.
The thickness of the base rubber of the tread is h1, the thickness of the crown rubber is h2, h1/h2 is 0.1-0.3, and the base rubber does not directly contact with the ground, so that the base rubber has no influence on wet grip and abrasion, the hysteresis loss coefficient of the base rubber can be properly adjusted, but the base rubber cannot be leaked to the outermost side of the tire in the later stage of tire use. Preferably, h1/h2 is 0.3
The cross section area of the crown rubber is S1, the cross section area of the shoulder rubber is S2, S1/S2 is 2.0-9.0, and the tensile modulus of the crown rubber and the tensile modulus of the shoulder rubber are 2.0-5.0 and 2.0-3.0MPa respectively.
RR＝πV tanδ∫σdε σ＝ε*E ε＝σ/E
RR rolling resistance, E modulus, σ stress, ε strain, V tire volume, tan δ material hysteresis loss tangent
The deformation of the shoulder portion is shown in fig. 3, and the main deformation mode during radial loading is bending deformation, namely the curvature radius of the shoulder portion is increased and becomes a straight line (the curvature radius is infinite). Under the action of certain air pressure and load, the bending deformation of the specific tyre is consistent, i.e. epsilon is a constant value. The strain energy at this location is related only to the stress σ. Reducing the modulus E of the material at this location reduces the stress and strain energy density, and thus reduces the rolling resistance of the tire.
The deformation of the crown part is shown in figure 4, and in the radial loading process, the main deformation mode is compression deformation, namely the pattern blocks at the tire shoulder part are deformed under compression, and the height radius is reduced, and the width is increased. Under the action of certain air pressure and load, the crown pressure of the specific tyre is consistent, namely sigma is a fixed value. The strain energy at this location is related only to the stress epsilon. Increasing the modulus E of the material at this location reduces the strain and strain energy density, and thus reduces the rolling resistance of the tire. The prior art and the strain energy density finite element simulation analysis of the present invention are shown in fig. 5 and 6.
The crown and shoulder cap cross-sectional area and modulus interact with the tire stress strain effect and need to be considered globally from the entire footprint area of the tire.
The tire specification is 205/55R 16100%, the cap tread to shoulder tread cross-sectional area ratio S1/S2 and modulus, the base tread to cap tread thickness ratio h1/h2, defined in Table 1.
The results of the simulation analysis of the rolling resistance RR are shown in Table 1:
preferably, S1/S2 is 2.53, and the tensile moduli of crown and shoulder rubbers are 4.85 Mpa and 2.21Mpa, respectively.
Verification example:
the tire specification is 205/55R 16100%, the cap and shoulder rubber cross-sectional area ratio S1/S2 and modulus, and the base tread rubber to cap rubber thickness ratio h1/h2, defined in Table 2.
The tensile modulus of the material is determined according to GB/T528-2009, and the rolling resistance of the tire is determined according to ISO 28580-2018.
The results are shown in Table 2:
as can be seen from the data in Table 1, the rolling resistances of the tires of examples 1-3 were reduced to different degrees compared to the reference example, with a maximum reduction of 8.23. Meanwhile, the safety performance and wet ground and abrasion performance of the tire are maintained as each example does not relate to the reduction of the overall material of the tire and the adjustment of the hysteresis loss of the tread material.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A tire tread structure for improving rolling resistance, comprising a crown (1), shoulders (2) and a base tread (3), characterized in that the base tread (3) has a rubber thickness h1, the crown (1) has a rubber thickness h2, h1/h2= 0.10-0.35; the cross section area of the crown (1) is S1, the cross section area of the shoulder (2) is S2, and S1/S2= 2-8.5; the 100% tensile modulus of the compounds of the base (3), crown (1) and shoulder (2) of the tread are respectively: 1.8-2.2, 2.0-5.0 and 2.0-3.0 MPa.
2. An improved rolling resistance tire tread structure as claimed in claim 1, wherein h1/h2=0.2-0.3
An improved rolling resistance tire tread structure as claimed in claim 2, wherein h1/h2= 0.3.
3. An improved rolling resistance tire tread structure as claimed in claim 1, wherein S1/S2= 2.5-4.0; the 100% tensile modulus of the rubber compound of the tread base (3), the tread cap (1) and the tire shoulder (2) is respectively as follows: 1.8-2.2, 3.5-5.0 and 2.2-3.0 MPa.
4. An improved rolling resistance tire tread structure as claimed in claim 4, wherein S1/S2=2.53, and the 100% tensile modulus of the compounds of the crown (1) and shoulder (2) is 4.85, 2.21MPa, respectively.
5. Use of a tread structure according to any one of claims 1 to 5 for improving the rolling resistance of a tyre.
6. A tire for improving rolling resistance comprises a tire crown (1), a tire shoulder (2), a tire tread base (3), a nylon belt layer (4), a steel belt layer (5), a tire side (6), a cord fabric layer (7), an inner liner layer (8), a bead filler (9) and a steel wire ring (10); the tire is characterized in that the tire crown (1), the tire shoulder (2) and the tire tread base (3) adopt the tire crown (1), the tire shoulder (2) and the tire tread base (3) in the tire tread structure of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092343.XA CN114537050A (en) | 2022-01-26 | 2022-01-26 | Tire tread structure for improving rolling resistance, application and tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092343.XA CN114537050A (en) | 2022-01-26 | 2022-01-26 | Tire tread structure for improving rolling resistance, application and tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114537050A true CN114537050A (en) | 2022-05-27 |
Family
ID=81674284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210092343.XA Pending CN114537050A (en) | 2022-01-26 | 2022-01-26 | Tire tread structure for improving rolling resistance, application and tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114537050A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101772426A (en) * | 2007-08-03 | 2010-07-07 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN103171374A (en) * | 2011-12-26 | 2013-06-26 | 住友橡胶工业株式会社 | Motorcycle tire |
| JP5779703B1 (en) * | 2014-09-04 | 2015-09-16 | 株式会社ブリヂストン | tire |
| CN105228816A (en) * | 2013-05-01 | 2016-01-06 | 株式会社普利司通 | Tire manufacturing method and tire |
| CN110372931A (en) * | 2019-08-02 | 2019-10-25 | 中策橡胶集团有限公司 | A kind of rubber composition and refining gluing method and low tire drag tire using the composition |
-
2022
- 2022-01-26 CN CN202210092343.XA patent/CN114537050A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101772426A (en) * | 2007-08-03 | 2010-07-07 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN103171374A (en) * | 2011-12-26 | 2013-06-26 | 住友橡胶工业株式会社 | Motorcycle tire |
| CN105228816A (en) * | 2013-05-01 | 2016-01-06 | 株式会社普利司通 | Tire manufacturing method and tire |
| JP5779703B1 (en) * | 2014-09-04 | 2015-09-16 | 株式会社ブリヂストン | tire |
| CN110372931A (en) * | 2019-08-02 | 2019-10-25 | 中策橡胶集团有限公司 | A kind of rubber composition and refining gluing method and low tire drag tire using the composition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2788715B2 (en) | Pneumatic tire | |
| CN108513551B (en) | Pneumatic tire | |
| KR100457612B1 (en) | Low cost light weight radial tire | |
| EP1752491B1 (en) | Pneumatic tire with sidewall component containing high strength glass bubbles | |
| US7040369B2 (en) | Pneumatic radial tire | |
| US20040079460A1 (en) | Pneumatic tire | |
| EP2708381B1 (en) | Pneumatic tire | |
| CN108463356B (en) | Pneumatic tire | |
| CN109070632B (en) | Pneumatic tire | |
| CN109774383A (en) | Pneumatic tire for heavy load | |
| KR20010013459A (en) | Light weight aramid belted radial tire | |
| JP3003878B2 (en) | Radial tire | |
| KR20010013458A (en) | Light weight fiberglass belted radial tire | |
| EP1193084A2 (en) | Pneumatic run-flat tire | |
| US6079467A (en) | Heavy duty radial tire with specified arrangement of chafer and carcass turnup | |
| US6991014B2 (en) | Pneumatic tire comprising cap and base and spirally wound cord | |
| CN110588248A (en) | Load-carrying tire with resistance to ditch bottom cracking | |
| EP0435620B1 (en) | A radial tyre for a passenger car | |
| CN1642758A (en) | Pneumatic tire | |
| CN101765521A (en) | Pneumatic tire | |
| CN114537050A (en) | Tire tread structure for improving rolling resistance, application and tire | |
| JP2007331531A (en) | Pneumatic tire | |
| EP3059100A1 (en) | Pneumatic tire | |
| JPH03169719A (en) | Pneumatic tire | |
| CN1805861A (en) | Pneumatic tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |