Vehicle Rollover Cause Identification

Car rollover cause identification is when professional technicians use physics, mechanics principles and professional knowledge to conduct on-site investigation, data analysis and simulation experiments on car rollover accidents to determine the specific causes of rollover. This identification usually involves a comprehensive assessment of the vehicle's speed, load, road conditions, driver operation, vehicle structure and performance.
In the case of car rollover cause identification, Zhongke Testing can provide car rollover cause identification services.

1, high-speed driving and speeding
Excessive speed is one of the main reasons for the front four and rear eight sides to roll over. When a vehicle is traveling at high speed, the centrifugal force on the vehicle body increases. If it exceeds the vehicle's stable range, it is prone to rollover.
2. Unreasonable load distribution
Unreasonable load distribution of cargo on the vehicle will lead to a high center of gravity and increase the risk of rollover. Especially when transporting goods, the position of the goods should be reasonably allocated to make the center of gravity as low and stable as possible.
3, bad road conditions
Poor road conditions such as slippery, undulating or sharp curves will increase the possibility of the vehicle rolling over. These factors will cause the vehicle to lose stability during driving and make it more likely to roll over.

GB 18384-2020 Electric vehicle safety requirements
GB/T 36149-2018 Express vehicle technical conditions
GB/T 18388-2005 Electric vehicle type test procedures
GB/T 24945-2021 Three-wheeled vehicle General technical conditions
GB/T 12679-1990 Vehicle durability driving test method
GB/T 4353-2022 Passenger vehicle operating fuel consumption
GB/T 31498-2021 Post-collision safety requirements for electric vehicles
GB/T 24549-2020 Fuel cell electric vehicles Safety requirements
GB 38031-2020 Safety requirements for electric vehicle power batteries
GB/T 36883-2018 Liquefied natural gas vehicle technical conditions
0GB/T 18385-2005 Electric vehicle power performance test method
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A company purchased 4 cars due to business expansion. During use, all four cars experienced varying degrees of problems. The company contacted the car sales company to send personnel to perform repairs, but the problem still could not be completely solved. The company offered to return the car, which was also rejected by the car sales company.
A few months later, one of the cars rolled over in an accident while driving, resulting in the death of the co-pilot on the spot, and two other people were seriously injured.
was entrusted by the court to conduct identification and analysis on the cause of the car rollover involved in the case.
appraisal analysis results: The
appraisal analysis expert group discussed the relevant information and on-site investigation of the car involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
1, the car involved The brief analysis between the rubber buffer blocks of the lower swing arms and the frame limit blocks on the left and right sides of the car is quite different;
2, there is a deviation in the position of the torsion bar spring adjustment bolts on both sides of the car involved;
3, there is also a problem with the hexagonal head positions of the bolts on the left and right sides of the car involved.
In summary, the quality of the car involved was problematic, which was the main reason for the accident.