JPS58211902A - Tire for front wheel drive car - Google Patents
Tire for front wheel drive carInfo
- Publication number
- JPS58211902A JPS58211902A JP57094484A JP9448482A JPS58211902A JP S58211902 A JPS58211902 A JP S58211902A JP 57094484 A JP57094484 A JP 57094484A JP 9448482 A JP9448482 A JP 9448482A JP S58211902 A JPS58211902 A JP S58211902A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- tire
- wear
- thickness
- center
- 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
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
-
- 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
- B60C11/0041—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
- B60C11/005—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
- B60C11/0058—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers with different cap rubber layers in the axial direction
Abstract
Description
【発明の詳細な説明】
本発明は、トレッド部の耐摩耗性を均一にし、耐久寿命
を向上した前輪駆動車用ラジアルタイヤに関する。。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radial tire for front wheel drive vehicles that has a uniform tread wear resistance and an improved durability life. .
最近乗用車は、居住空間の拡張、低燃費化及び高速安定
性、直＋進走行性等の向上の要請から、後輪駆動車Ｋか
えて前輪駆動車が除々に採用されつつある。 しかし前
輪駆動車では、前輪の荷重が増大するとともに、従来の
ステアリング機能に駆動機能が付加されるため、後輪駆
動車に較べてタイヤの使用条件が苛酷となり、摩耗、特
にタイヤショルダ一部における偏摩耗が顕著となり、こ
れは前輪部分のアライメント機構のパランスを損なうこ
とにもなる。 そこで従来から一定期闇ごとにタイヤの
装着位置を変更することくより摩耗量を均一化すること
が行なわれているが、タイヤの装着位置の変更は手数と
費用がかかるため必ずしも好ましい方法とはいえない。Recently, front-wheel-drive cars are gradually being adopted in passenger cars instead of rear-wheel-drive cars due to demands for increased living space, lower fuel consumption, high-speed stability, straight-line driving performance, etc. However, in front-wheel drive vehicles, the load on the front wheels increases and a driving function is added to the conventional steering function, so the conditions for using the tires are more severe than in rear-wheel drive vehicles, resulting in wear and tear, especially in the tire shoulders. Uneven wear becomes noticeable, and this also impairs the balance of the alignment mechanism of the front wheel. Conventionally, it has been done to equalize the amount of wear by changing the tire mounting position at regular intervals, but changing the tire mounting position is laborious and costly, so it is not necessarily a preferable method. I can't say that.
本発明けこのような手数を排除し、均一な摩耗を生じせ
しめることによりタイヤ全体としての耐久寿命を向上し
た前輪駆動車用ラジアルタイヤの提供を目的とし、タイ
ヤトレッド部を、トレッド接地幅の３０ 、１０％の幅
寸度のトレッド中央部と、該トレッド中央部の両側に配
置されるトレッド側部とに分割するとともに、前記トレ
ッド側部には耐摩耗性ゴム組成物を用いたことを特徴と
している。The object of the present invention is to provide a radial tire for a front wheel drive vehicle, which eliminates such troubles and improves the durability life of the tire as a whole by producing uniform wear. The tread is divided into a center portion having a width of 10% and side portions disposed on both sides of the center portion of the tread, and a wear-resistant rubber composition is used for the side portions of the tread. It is said that
図において本発明の曲論駆動車用ラジアルタイヤｆｌｌ
ｉ、ｔ、そのトレッド部（２）が、トレッド中央部（３
）中央に向って厚く々る断面円弧片状をなし、又・−の
トレンド中央部Ｔ３＋の幅（Ｗ、）けトレッド接地幅（
Ｗｌの３０〜１０％に設定される。 即ちトレッド中央
部（３）の幅（Ｗｌ）がトレッド接地幅傳）の３０％よ
りも小さいとトレッド中央部（３）のゴム層によって得
られるグリップ性能が劣り、他方Ｉθ％を越えると、シ
ョルダ一部の耐摩耗性に劣ることによる。 なおトレッ
ド中央部（３）けその全幅（Ｗｌ）に亘り同一厚さに形
成してもよい。 またトレッド中央部（３）の半径方向
厚さくｔ）Ｉ／′ｉ、トレツＦ厚さくＴ）の５０〜１０
０％とすることか好ましい。 これはトレッド部の摩耗
後期に、該トレッド中央部（３）が消失してしまうから
であり、同様にトレッド摩耗後期における偏摩耗を防止
するためトレッド側部（４）の半径方向厚さくｄｌけト
レツＦ厚さくＴｌの＃−／θ０％の範囲とする。In the figure, a radial tire for a torturous drive vehicle according to the present invention is shown.
i, t, the tread part (2) is the tread center part (3
) The cross section has an arcuate shape that thickens toward the center, and the width (W, ) of the central part T3+ of the - trend and the tread contact width (
It is set at 30-10% of Wl. That is, if the width (Wl) of the tread center part (3) is smaller than 30% of the tread contact width (Tread contact width), the grip performance obtained by the rubber layer of the tread center part (3) will be poor, while if it exceeds Iθ%, the shoulder This is due to poor wear resistance. Note that the tread center portion (3) may be formed to have the same thickness over the entire width (Wl) of the ridge. Also, the radial thickness t) I/'i of the tread center part (3), and the tread F thickness T) 50 to 10.
It is preferable to set it to 0%. This is because the central part (3) of the tread disappears in the late stage of tread wear. Similarly, in order to prevent uneven wear in the late stage of tread wear, the radial thickness of the tread side parts (4) is increased by dl. The thickness of Toretsu F is in the range of #-/θ0% of Tl.
次に本発明では前記トレッド側部（４）に耐摩耗性のゴ
ム組成物が用いられる。 これはタイヤのトレッド側部
＋４１ｔｒｉ剛性の高いべｌレト層の端部に位置し剛性
の段差か形成されるとともに路面とのスリップカ五生じ
やすく、しかも前輪駆動車用として使用された場合苛酷
な使用条件と相撲ってショルダ一部のみが極度に摩耗す
る、いわゆる偏摩耗が生７るため、この部分にトレッド
中央部（３）より４１＃摩耗性のゴム組成物を用いるー
ことにより摩耗量の均一化を図るものである。 そこで
トレンド側部（４）のゴムの耐摩耗性指数（Ａｓｈ）は
、通常トレッド中央部（３）のゴムの耐摩耗性指数（Ａ
ｃ ｒ ）の／／θ〜／Ａ０９６好ましくｔ′ｉ／コθ
〜／グＯ％とする。 ここで耐摩耗性指数はピコ摩耗試
験機によって測定された値を指数化したもので大きいほ
ど耐摩耗性に優れていることを示す。Next, in the present invention, a wear-resistant rubber composition is used for the tread side portions (4). This is located at the edge of the tire's tread side + 41tri highly rigid bevel layer, forming a rigid step and easily causing slippage with the road surface, and moreover, when used for front-wheel drive vehicles, it is subject to severe use. Due to the conditions, only a part of the shoulder is extremely worn, which is called uneven wear. Therefore, by using a 41# abrasive rubber composition in this part from the center of the tread (3), the amount of wear can be reduced. This is aimed at achieving uniformity. Therefore, the abrasion resistance index (Ash) of the rubber in the trend side part (4) is usually the same as the abrasion resistance index (Ash) of the rubber in the center part (3) of the tread.
cr) //θ~/A096 preferably t'i/koθ
~/g O%. Here, the abrasion resistance index is an index of the value measured by a Pico abrasion tester, and the larger the index, the better the abrasion resistance.
次に本発明ではトレッド摩耗の均一化は前記ゴムの耐摩
耗性指数とトレッド溝深さとの相関件において達成する
ことが望ましい。 即ちトレッド中央部（３）における
トレンド溝深さくＤｃｒ）及びトレンド側部（４）Ｋお
けるトレッド溝深さくＤｓｈ）と前記耐摩耗性指数（Ａ
ｓｈ）、（Ａｃｒ）とで下記の式によって定義される相
対摩耗性指数（Ｐｌが／、 、２３以上かつ／、ｙｊ以
下である。Next, in the present invention, it is desirable that the uniformity of tread wear is achieved in the correlation between the abrasion resistance index of the rubber and the tread groove depth. That is, the trend groove depth Dcr) at the tread center portion (3), the tread groove depth Dsh) at the trend side portion (4) K, and the wear resistance index (A
sh) and (Acr), the relative abrasion index (Pl) defined by the following formula is /, , 23 or more and /, yj or less.
Ａｓ ｈ Ｄｓ ｈ
Ｐ唖□×□
Ａｃ ｒ Ｄｃ ｒ
相対摩耗性指数（Ｐ）を上記範囲内［調整することによ
ってトレッド表面の摩耗を一層均一忙することかできる
。By adjusting the relative abrasion index (P) within the above range, the tread surface can be worn more uniformly.
しかして本発明のラジアルタイヤはトレッド部をトレン
ド中央部（３）とトレッド側部（４）とに分割するとと
もに、各部分の摩耗速度に対応して、′ゴムの特性、あ
るいけ溝深さを調整し最適化を図ったためトレッド全体
の摩耗を均一にするとともにタイヤの耐久寿命を一層向
上することができる。Therefore, in the radial tire of the present invention, the tread part is divided into a trend center part (3) and a tread side part (4), and the characteristics of the rubber and groove depth are adjusted according to the wear rate of each part. By adjusting and optimizing the tread, it is possible to even out the wear of the entire tread and further improve the durability of the tire.
タイヤ走行時のトレッド中央部（３）とトレッド側部（
４）の剥離を防止するため両者を同時に押し出してトレ
ンドゴムを作成した。なおシートの押し出しにＩ／ｉＹ
−ボックス型押出機を用いた。The center part of the tread (3) and the side part of the tread (
In order to prevent 4) from peeling off, both were extruded at the same time to create a trend rubber. In addition, I/iY is used to extrude the sheet.
- A box extruder was used.
こ九をタイヤサイズ／ＡＪ５ｐ、／Ｊのスチールラジア
ルタイヤに適用して実施例のタイヤを、更に比較例とし
てトレンド部以外は実施例と同様に１゜て比較例のタイ
ヤを試作した。トレンドに用いたゴム配合を＠１表に示
す。兜に各タイヤを、トヨタ自１１Ｊ車工業株式会社製
の自動車ターセル（商標）に装着し高速道路、及び−最
小街路を各５θ％重削で合計／Ｊ、θθθ−走行し念後
の耐摩耗性を評価した。ここで耐摩耗性けりアタイヤの
トレッド中央部（３）の摩耗を１００とした場合の相対
値で示される。甘たクエソトグリップ性能はＡＳ１’Ｍ
＋・上１ｔに準拠したトレーラ−試験を用いて測定した
。ここでクエソトグリップ性能は数値が大きｂ稈優れて
いることを示す。これらの性能測定結果をタイヤ試作条
件とともに＠２表に示す。This technique was applied to a steel radial tire of tire size /AJ5p, /J to make a tire of an example, and as a comparative example, a tire of a comparative example was made as a trial by adjusting 1° in the same manner as in the example except for the trend part. The rubber compound used for Trend is shown in Table 1. Each tire was attached to a Toyota Motor Corporation 11J Car Industry Co., Ltd.'s Tercel (trademark) and driven on highways and streets with 5θ% heavy cutting in total /J, θθθ- to test the wear resistance. The gender was evaluated. Here, it is shown as a relative value when the wear of the tread center part (3) of the wear-resistant tire is set as 100. Sweet questoto grip performance is AS1'M
+/Measured using a trailer test based on 1t above. Here, the quesoto grip performance has a large numerical value, indicating that b culm is superior. The results of these performance measurements are shown in Table @2 along with the tire trial production conditions.
第１表
第２表
第２表から実施例１では、前輪タイヤの摩耗がトレッド
部全体が均一に進行しており偏摩耗が少なく、またクエ
ットグリップ性能も向上していることが認められる。From Table 1 and Table 2, it can be seen that in Example 1, the wear of the front tire progressed uniformly over the entire tread portion, there was little uneven wear, and the Couette grip performance was improved.
第１図は本発明のタイヤの断面図、第２図は第１図のト
レッド部拡大断面図である。
（２）・・・トレンド部、（３１・・・トレッド中央部
、（４）・・・トレッド側部、Ｔ）・・トレッド厚さ、
（１）・・・厚さ、（Ｗ）・・・接地幅、（Ｗｌ）・・
・幅。
特 許出願人 住友ゴム工業株式会社代理人 弁理
士 苗 利 王家１ 図
第２［／ｌFIG. 1 is a sectional view of the tire of the present invention, and FIG. 2 is an enlarged sectional view of the tread portion of FIG. 1. (2)...Trend part, (31...Tread center part, (4)...Tread side part, T)...Tread thickness,
(1)... Thickness, (W)... Ground contact width, (Wl)...
·width. Patent Applicant Sumitomo Rubber Industries Co., Ltd. Agent Patent Attorney Nae Li Ohke 1 Figure 2 [/l
Claims (1)
〜／θ％の幅を有するトレッド中央部と。 該トレッド中央部の両側に配置されるトレッド側部とに
分割するとともに、前記トレッド側部に＃Ｉ４摩耗性を
有するゴム組成物を用いたことを特徴とする前輪駆動車
用タイヤ。 （２）トレンド中央部が、タイヤ半径方向に、トレッド
厚さの３０〜ＩＯθ％程度の厚さを有する特Ｔｆ−請求
の範囲第（１）項記載のタイヤ。 １ｇ＋ ）、レッド側部Ｆｉ、そのゴムの耐摩耗性指
数（Ａｓｈ ）がトレッド中央部のゴムの耐摩耗性指＆
（Ａｃｒ）の／／θ〜ｉｔｏ ９６である特許請求の範
囲箸（１）項記載のタイヤ。 １４）トレッド中央部の耐摩耗性指数（Ａｃｒ）と、ト
レッド側部の耐摩耗性指＆（Ａｓｈ）とか、トレッド中
央部のトレッド溝深さくＤｃｒ）及び、トレッド側部の
トレッド溝深さくＤｓｈ）とともに下記の関係式で求め
られる相対摩耗性指数史）を、／、２５以上で／０ｇＩ
！以下となるように設定１ｙ■た特許請求の範囲第＋１
１項記載のタイヤ。[Scope of Claims] (The tread portion of the tire should be
and a tread central portion having a width of ~/θ%. A tire for a front wheel drive vehicle, characterized in that the tire is divided into tread side parts disposed on both sides of the tread center part, and a rubber composition having #I4 abrasion properties is used for the tread side parts. (2) The tire according to claim (1), wherein the trend center portion has a thickness of about 30 to IOθ% of the tread thickness in the tire radial direction. 1g+), red side Fi, and the abrasion resistance index (Ash) of the rubber in the center of the tread.
(Acr) //θ~ito 96 The tire according to claim (1). 14) Wear resistance index (Acr) at the center of the tread, wear resistance index (Ash) at the side of the tread, tread groove depth (Dcr) at the center of the tread, and depth Dsh of the tread groove at the side of the tread. ) and the relative abrasion index history) obtained from the following relational expression, /, 25 or more /0gI
! Claim No. +1 set as follows:
The tire described in item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57094484A JPS58211902A (en) | 1982-06-01 | 1982-06-01 | Tire for front wheel drive car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57094484A JPS58211902A (en) | 1982-06-01 | 1982-06-01 | Tire for front wheel drive car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58211902A true JPS58211902A (en) | 1983-12-09 |
Family
ID=14111550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57094484A Pending JPS58211902A (en) | 1982-06-01 | 1982-06-01 | Tire for front wheel drive car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58211902A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992202A (en) * | 1982-10-20 | 1984-05-28 | ゼンペリツト ライフエン アクチエンゲゼルシヤフト | Pneumatic tire for automobile, which has radial carcass and consist of base layer, tire tread section thereof is near byshaft, and crown layer disposed on said layer |
| FR2578200A1 (en) * | 1984-12-27 | 1986-09-05 | Bridgestone Corp | MULTI-PART TRUCK FOR TRUCK OR BUS TIRES |
| EP0358491A2 (en) * | 1988-09-06 | 1990-03-14 | Sumitomo Rubber Industries Limited | High speed radial tyre |
| US5285835A (en) * | 1988-09-06 | 1994-02-15 | Sumitomo Rubber Industries, Ltd. | High speed radial tire with durable bead part |
| US5622575A (en) * | 1994-06-10 | 1997-04-22 | Continental Aktiengesellschaft | Pneumatic vehicle tire with a symmetrical carcass, symmetrical belt plies, and an asymmetrical tread |
| EP0778162A1 (en) * | 1995-12-05 | 1997-06-11 | Sumitomo Rubber Industries Limited | Pneumatic tyre |
| JP2000238505A (en) * | 1999-02-23 | 2000-09-05 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| KR100451860B1 (en) * | 2002-06-27 | 2004-10-08 | 금호타이어 주식회사 | Pneumatic tire with multi tread rubber composition |
| KR100459666B1 (en) * | 2002-07-31 | 2004-12-03 | 금호타이어 주식회사 | Pneumatic tire with multi tread |
| KR100459665B1 (en) * | 2002-07-31 | 2004-12-03 | 금호타이어 주식회사 | Pneumatic tire with multi tread |
| US20150083293A1 (en) * | 2010-11-10 | 2015-03-26 | The Goodyear Tire & Rubber Company | Passenger tire having low rolling resistance with improved wet traction and treadwear |
| EP3508354A1 (en) * | 2018-01-09 | 2019-07-10 | Nexen Tire Europe s.r.o. | Tire tread and pneumatic tire |
| US10603957B2 (en) | 2013-05-30 | 2020-03-31 | Compagnie Generale Des Etablissements Michelin | High-grip profiled tread skims |
| US20210023887A1 (en) * | 2019-07-26 | 2021-01-28 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311724A (en) * | 1976-07-21 | 1978-02-02 | Shikutani Kk | Bush cleaner |
| JPS56128203A (en) * | 1980-03-10 | 1981-10-07 | Bridgestone Corp | Radial tyre prominent in resistance against partial frictional consumption |
-
1982
- 1982-06-01 JP JP57094484A patent/JPS58211902A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311724A (en) * | 1976-07-21 | 1978-02-02 | Shikutani Kk | Bush cleaner |
| JPS56128203A (en) * | 1980-03-10 | 1981-10-07 | Bridgestone Corp | Radial tyre prominent in resistance against partial frictional consumption |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992202A (en) * | 1982-10-20 | 1984-05-28 | ゼンペリツト ライフエン アクチエンゲゼルシヤフト | Pneumatic tire for automobile, which has radial carcass and consist of base layer, tire tread section thereof is near byshaft, and crown layer disposed on said layer |
| FR2578200A1 (en) * | 1984-12-27 | 1986-09-05 | Bridgestone Corp | MULTI-PART TRUCK FOR TRUCK OR BUS TIRES |
| EP0358491A2 (en) * | 1988-09-06 | 1990-03-14 | Sumitomo Rubber Industries Limited | High speed radial tyre |
| US5285835A (en) * | 1988-09-06 | 1994-02-15 | Sumitomo Rubber Industries, Ltd. | High speed radial tire with durable bead part |
| US5622575A (en) * | 1994-06-10 | 1997-04-22 | Continental Aktiengesellschaft | Pneumatic vehicle tire with a symmetrical carcass, symmetrical belt plies, and an asymmetrical tread |
| EP0778162A1 (en) * | 1995-12-05 | 1997-06-11 | Sumitomo Rubber Industries Limited | Pneumatic tyre |
| JP2000238505A (en) * | 1999-02-23 | 2000-09-05 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| KR100451860B1 (en) * | 2002-06-27 | 2004-10-08 | 금호타이어 주식회사 | Pneumatic tire with multi tread rubber composition |
| KR100459666B1 (en) * | 2002-07-31 | 2004-12-03 | 금호타이어 주식회사 | Pneumatic tire with multi tread |
| KR100459665B1 (en) * | 2002-07-31 | 2004-12-03 | 금호타이어 주식회사 | Pneumatic tire with multi tread |
| US20150083293A1 (en) * | 2010-11-10 | 2015-03-26 | The Goodyear Tire & Rubber Company | Passenger tire having low rolling resistance with improved wet traction and treadwear |
| US10603957B2 (en) | 2013-05-30 | 2020-03-31 | Compagnie Generale Des Etablissements Michelin | High-grip profiled tread skims |
| EP3508354A1 (en) * | 2018-01-09 | 2019-07-10 | Nexen Tire Europe s.r.o. | Tire tread and pneumatic tire |
| US20210023887A1 (en) * | 2019-07-26 | 2021-01-28 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire |
| US11801714B2 (en) * | 2019-07-26 | 2023-10-31 | Sumitomo Rubber Industries, Ltd. | Heavy duty pneumatic tire |
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