R&D Area

Meaning of Anti Vibration System (AVS)

The main anti-vibration function is to prevent vibrations and noises generated from vibration sources of machines and vehicles not to be delivered to users and passengers, and its additional function is to enhance reliability and durability of machines and vehicles.

Theory

For the anti-vibration design under the vibration system composed of vibration parameters m, c and k, the vibration system is illustrated in the mathematical model idealized in the degree-of-freedom system as shown in the figure.

The equation of motion of this system is indicated in Newton's Second Law of Motion as follows:

Characteristics of Rubber

It is a polymer that deforms when a weak force is applied at room temperature but restores to its original form when the external force is removed.

The substance in which the viscous property and the elastic property coexist ( Viscoelastic Polymer)
→ Elasticity: Load supporting function, viscosity: Impact absorbing function

Once vulcanized, the product cannot be reformed even if heat and/or pressure is applied.

In Vehicle Function of Anti-Vibration Product

1. Load Supporting Function (Stability)
2. Noise, Vibration and Harshness Performance (NVH Performance)

One of technical evaluation indices on vehicle development

One of key marketability factors

3. Vibration Insulation of Anti-Vibration Rubber

Vibration insulation (blocking) role in the vibration transmission path

One of important parts for sensible quality of vehicle including stability, comfort and silence required by customers. Importance of the anti-vibration rubber product keeps on increasing.

Anti-Vibration Product Reliability Improvement

  • Single product design
    → Secured system design capacity
  • Development of durable system specifications
    (Cooperation with customers)
  • Formulation technology enhancement
  • High functional new material development
    (such as high heat resistance)
http://phhc.co.kr/m_eng/rd/images/about_avs_img6.jpg
  • Single product evaluation verifiable of the actual car validity
  • Implementation of a systematic durable test under actual car conditions
  • Mold design and production technology enhancement
  • Automated and advanced production equipment

Anti-Vibration Part in Power Train and Chassis System