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Car Assessment MethodRollover Resistance
Rollover test refers to the test that measures the risk of rollover when vehicles conduct high-speed sudden turn and road departure.
Expects the reduction in rollover accidents by providing information on possibility of rollover to the consumer and bring about recognition on risk of rollover during the high-speed sudden turn and road departure.
1. Test Method
| Vehicle Loading Condtion, Etc | ㆍThe vehicle manufacturer's recommended cold tyre inflation
pressure ㆍInstall Dummy to the Driver Seat in Complete Vehicle Kerb Weight |
|---|---|
| track width & wheelbase Measurement | ㆍTrack width : Measure Front Wheel (4 runs) & Rear Wheel
(4 runs) and Calculate Average track width ㆍwheelbase : Measure Left/Right wheelbase 2 runs |
2.Test Item : Static Stability Factor (SSF)
- Calculate SSF by measuring height of the center of gravity, etc by tilting the vehicle toward front and rear 2 times respectively
- Static Stability Factor (SSF) = T/2H
- T : track width(mm) / H: height of the center of gravity (mm)
1. Test Method
| Vehicle Loading Condtion, Etc | ㆍThe vehicle manufacturer's recommended cold tyre inflation pressure ㆍGVWR(Gross Vehicle Weight Rating)-(3 water dummy) |
|---|---|
| Test Speed | ㆍ55, 65, 70, 75, 80km/h |
| Steering Wheel Rate | ㆍ720deg/s |
| Steering Wheel Angle Input | ㆍGeneration of Lateral Acceleration 3.0m/s² Steering Wheel Angle(δ3.0㎨)× 6.5 and 5.5 |
2. Test Item : Lifting of Wheel
- When the cornering inner wheel is lifted over 50mm from the road surface at once, it is considered as "tip-up".
- Rollover resistance ratings are divided into 5 levels and highest level and lowest level is indicated with 5 stars and 1 star respectively.
| Rollover Resistance Rating | Risk of Rollover |
|---|---|
| ★★★★★ | Less than 10% |
| ★★★★ | Between 10% and 20% |
| ★★★ | Between 20% and 30% |
| ★★ | Between 30% and 40% |
| ★ | Greater than 40% |