The chassis suspension of the car will vibrate when driving. Usually, bushings will be installed on the control arm and balance bar to avoid mutual motion interference between the parts of the suspension while shaking and vibrating, as well as to avoid external impacts and vibrations, thereby contributing to a protective effect and enhancing driving comfort.

Bushings are both resilient and damped, storing energy as springs do and releasing that energy, while absorbing energy as shock absorbers do. Multiple bushings are available in the suspension control arm, with each having a distinct performance impact on the vehicle.

The front bushing is primarily to guarantee the performance of the front suspension system in terms of smoothness of the car, thus its stiffness is relatively small; the rear bushing is primarily to guarantee the performance of the rear suspension system in terms of handling stability of the car, thus its stiffness is rather large.

Typical rubber-metal bushing structure, as compared to rubber bushings consisting of regular cylindrical shaped metal tubes (conventional rubber bushings), the bushings have less tapered swing stiffness; with greater radial stiffness and lower axial stiffness.

In the suspension design, it is considered that bushings are sometimes required to provide greater damping in order to attenuate the vibration of the control arm more quickly, whereas rubber bushings have less damping, whereby hydraulic bushings are designed based on this purpose. Hydraulic bushings can be divided into radial and axial, each offering greater damping in both the radial and axial directions of the bushing.

“Hydraulic bushings” refer to the hollow structure inside the bushings, in which the cavities are filled with fluid. When the deformation occurs inside the bushing, the fluid inside flows with it. When the fluid flows through these narrow channels, it attenuates a portion of the vibration energy, just like a hydraulic damper. Thus, besides the damping of the rubber material itself, the flow of fluid also provides additional damping, resulting in improved damping of the bushing as a whole, which also allows the bushing to be made even softer.

1.Adopting high-grade natural Thai rubber, which features excellent elasticity, oil resistance, acid resistance, corrosion resistance, etc., and high tensile strength, which significantly extends the service life of the bushing.

2.Using 20# or 35# steel, which is solid and durable.

3.Using HF INTERMIXX engagement type refining technology for highly dispersible and temperature sensitive rubber products, which makes the service life and comfort of the rubber in the bushings much better.

4.Adopting German rubber injection machine/DESMA rubber products vulcanization equipment with stable temperature control, intelligent monitoring of the production process and records of products.

5.Adopting American MTS elastomer testing / static and dynamic stiffness testing equipment.

6.Using Japanese Zeiss ZEISS metallic microscope (analytical grade) metal material tester.

7.Conducting product testing using testing equipments such as rubber constant temperature and humidity, thermal calibration, high and low temperature, and ozone calibration chamber.

8.The products comply with the following standards.

SAE J1401/FMVSS106/GMW3056

1.Inspecting regularly whether the rubber bushings of swing arms and tie rods are cracked or become loose

2.Tires will oscillate abnormally when the car is moving and the tires will wear out improperly when the bushings are damaged.

3.The chassis will have abnormal sound generated.

The state of the bushing will have a direct impact on the comfort of driving, also the bushing belongs to the delicate and wearable parts, then when do we should replace the bushing?

1.Perceiving whether the wheels have any abnormal phenomenon such as irregular shaking and response.

2.Identifying the surface condition of the bushing, whether there are cracks and breakage.

A serious cracking and ripping would be a sign that the bushing has run out of life. Occasionally there are some fine cracks that we see on the rubber surface of the bushing which appear to be very compact and shallow. It may not affect its function much at this time, however, this has been a warning that the rubber is aging and needs to be changed.

The chassis suspension of the car will vibrate when driving. Usually, bushings will be installed on the control arm and balance bar to avoid mutual motion interference between the parts of the suspension while shaking and vibrating, as well as to avoid external impacts and vibrations, thereby contributing to a protective effect and enhancing driving comfort.