International Journal of Automotive Technology

, Volume 18, Issue 6, pp 973–981 | Cite as

Development of a valve and optimization of a tube for self-inflating tire

  • Myeong Jun Kim
  • Tae Won Park
  • In Kyeong Hwang
  • In Chul Sung
  • Hyoung Seok Kim
  • Sang Do Na
  • Sung Pil Jung
  • Tae Hee Lee
  • Kyung Up Mah
  • Jae Yun Lee


Worldwide, the tire market requires safe and eco-friendly tires. In this study, a self-inflating tire (SIT) was studied and manufactured. Self-inflating tire refers to a technique for maintaining appropriate tire pressure. An internal regulator senses when tire inflation pressure has dropped below the set air pressure. The tire boosts air through the valve when rolling and compressed air enters into the tire. This procedure keeps the tire air pressure at an appropriate level and increases tire safety. In this study, a regulator was used as a negative-pressure system. A check valve was selected the minute flow check valve depending on the shape of the configured system. In addition, the material of the tube was developed with excellent physical properties and resistances (elastic rebound, working temperature, etc.) owing to its complete compression and restoration. A tube performance tester was developed and a computer aided engineering (CAE) model was modeled for comparison with the test results. Using the tester and model, it was possible to optimize the shape of the tube and regulator. Finally, the reliability of the study was verified through the prototype test. The developed equipment and systems can be used for the manufacture of high-performance and safe tires.

Key words

UHP (Ultra-High-Performance) tire Self inflating Safety Eco-friendly tire FSI (Fluid-Structure Interaction) 



half width of the channel or radius of the tube


half width of the channel or radius of the tube at inlet




wave speed


Darcy number


wall coordinate of peristaltic wave


length of the channel or tube


pressure rise


dimensionless pressure rise


instantaneous volume flow rate

\(\overline Q \)

time mean volume rate of flow




slip velocity


velocity in the permeable boundary

R, Θ, Z

cylindrical polar coordinates in laboratory frame

R, θ, z

cylindrical polar coordinates in wave frame


wave length


slip parameter


spring deformation


increased air pressure


tube external diameter


input air pressure


output air pressure


one of the measures

\(\overline y \)

average of y i


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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Myeong Jun Kim
    • 1
  • Tae Won Park
    • 1
  • In Kyeong Hwang
    • 1
  • In Chul Sung
    • 2
  • Hyoung Seok Kim
    • 2
  • Sang Do Na
    • 2
  • Sung Pil Jung
    • 3
  • Tae Hee Lee
    • 3
  • Kyung Up Mah
    • 4
  • Jae Yun Lee
    • 5
  1. 1.Department of Mechanical EngineeringAjou UniversityGyeonggiKorea
  2. 2.KUMHO Tire, 215-21 Saeun-ro, Giheung-gu, Yongin-siGyeonggiKorea
  3. 3.KATECH, 303 Pungse-ro, Pungse-myeon, Dongnam-gu, Cheonan-siChungnamKorea
  4. 4.Youil, 19, Mujeonggongdan-gil, Mujeong-myeon, Damyang-gunJeonnamKorea
  5. 5.CorechipsGyeonggiKorea

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