• Title/Summary/Keyword: 3-Tire

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A Study on Lateral Tire-road Friction Coefficient Estimation Using Tire Pneumatic Trail Information (타이어 뉴메틱 트레일 정보를 활용한 횡방향 타이어 노면 마찰 계수에 관한 연구)

  • Han, Kyoungseok;Choi, Seibum
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.3
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    • pp.310-318
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    • 2016
  • The demands for vehicle safety systems such as ABS and ESC have been increased. Accurate vehicle state estimation is required to realized the abovementioned systems and tire-friction coefficient is crucial information. Estimation of lateral tire-road friction coefficient using pneumatic trail information is mainly dealt in this paper. Pneumatic trail shows unique characteristics according to the wheel side slip angle and these property is highly sensitive to vehicle lateral motion. The proposed algorithm minimizes the use of conventional tire models such as magic formula, brushed tire model and Dugoff tire model. The pure side slip maneuver, which means no longitudinal dynamics, is assumed to achieve the ultimate goal of this paper. A simulation verification using Carsim and Simulink is performed and the results show the feasibility of the proposed algorithms.

A Study on Tire Stiffness Design to reduce Tire Rumble Noise (럼블 소음 저감을 위한 타이어 강성 설계 방안 연구)

  • Kin, Kun-Ho;Kang, Young-Kyu;Kim, Kee-Woon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2012.04a
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    • pp.298-304
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    • 2012
  • The development of low rolling resistance tire with weight reduction in tire and vehicle may induce high level of tire/road noise, especially the rumble road noise on rough road. In this paper, the design factor for good rumble noise is considered in view of tire and vehicle. For the 3 mid-sized sedans, the rumble noise is very sensitive to the test vehicle. And it is concluded that the tire with high tread part stiffness and low sidewall part stiffness shows best rumble noise performance, and the rumble noise is in trade-off relation with cavity resonance noise. So, it is desirable to select and change proper construction design factors to have good tire/vehicle rumble noise.

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Development of an Active Tire Pressure Control System Using a Tire Simulator (타이어 시뮬레이터를 이용한 능동형 타이어 공기압 제어 시스템 개발)

  • Lee, Kyu-Cheol;Ryu, Kwan-Hee;Rhee, Joong-Yong;Hong, Ji-Hyang;Kim, Hyeok-Joo;Yu, Ji-Hoon
    • Journal of Biosystems Engineering
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    • v.35 no.1
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    • pp.21-30
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    • 2010
  • This study was performed to develop an active tire pressure control system that can adjust tire pressure to the optimum level according to traveling and working condition of agricultural tractor. For the development of active tire pressure control system, pneumatic supplier, solenoid valve block including pneumatic supply line, infinite rotation type pneumatic supplier with rotary joint unit, tire pressure transceiver module and control algorithm were developed. Also, tire simulator was developed. Using this tire simulator, the feasibility of each part constructing actual system was tested by checking the performance. The average communication success ratio was 98.3% between tire pressure transmitter and receiver module according to the various tire rotational speed and data receipt position of receiver module. The communication performance of the developed transmitter and receiver module was very stable in any condition. The tire pressure control system was accomplished by using the proportional control algorithm in this study. Also tire pressure control performance of developed control system was analyzed by using the tire simulator. As a result of control performance analysis to the developed system, the developed control system took 307 seconds to inflate agricultural tractor's tire from 50 kPa to 180 kPa. In opposite case, it took 210 seconds. Also it was able to control the tire pressure accurately under ${\pm}0.9%$ (FS) in any condition.

타이어 마모한계 1.6mm 적정한가

  • Korea Tire Manufacturers Association
    • The tire
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    • s.229
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    • pp.21-21
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    • 2006
  • 세계적으로 널리 받아들여지고 있는 1.6mm의 타이어 마모한계는 적정한 것인가? 최근 미국과 유럽에서는 이에 대한 논란이 일고 있으며 이와 맞물려 자동차 운행의 안전을 위하여 타이어업계가 나서서 3.2mm를 기준 마모한계로 정해지도록 노력해야한다는 데 대한 논란이 이어지고 있다.

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세계 고무 및 자동차용타이어 장기 수급 전망

  • Korea Tire Manufacturers Association
    • The tire
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    • s.99
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    • pp.2-17
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    • 1982
  • 본고는 미국 Predicasts 사에서 발간되는 World Rubber & Tire Markets(81년 3월 발행)지에서 발췌ㆍ요약한 것으로, 1966년~1995년까지의 세계각국의 자동차산업 및 고무 수급전망 등 타이어 수급전망에 관련된 모든 분야에 걸쳐 조사ㆍ분석한 것이다. 본자료는 앞으로도 계속 본지에 연재할 예정이오니 많이 참고해 주시기 바랍니다. <편집자주>

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Mechanical Properties of Lightweight Mortar in Accordance with the Particle Size and Replacement Ratio of the Wasted Tire Chip (폐타이어 분말의 치환율과 입자크기에 따른 경량 모르타르의 역학적 특성)

  • Yang, Hun;Lee, Yong;Lee, Sang-Soo
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.3 no.4
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    • pp.342-347
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    • 2015
  • This study is basic experiment which prevents indiscriminate reclamation and recycles the wasted tire in order to solve environmental pollution according to generation rate of the wasted tire from recently industrial development. By applying as the substitute material of the lightweight aggregate among the constructional materials in order to evaluate the lightness of the wasted tire chip and suggest the recycling plan of the wasted tire chip. The prior experiment did the replacement ratio of the wasted tire with 20%, 40%, 60%, 80%, 100%, etc. and made a study on the strength and density properties. Based on the prior experiment of wasted tire, the replacement ratio was fixed at 15, 20, 25%, particle size of wasted tire was fixed at 0.2, 0.8, 1~2, 3~5, 5~7(mm). As a result, it is supposed that the best replacement ratio and particle size are 15% and 1~2mm, respectively.