The function of the car ingot beam
The main functions of the car's gold coin beam (subframe) are as follows:
Youdaoplaceholder0 Support and fixation : It lifts and fixes core components such as the engine and transmission, and at the same time enhances the rigidity of the vehicle body through lateral connection, protecting the oil pan and engine from direct collision.
Youdaoplaceholder0 Vibration isolation : Connects the suspension system with the main frame to reduce the direct transmission of jolts and noise to the cabin, enhancing driving comfort.
Youdaoplaceholder0 Collision protection : In the event of a vehicle collision, it absorbs energy through structural deformation to reduce the impact on the passenger compartment.
Youdaoplaceholder0 Enhance handling : The full-frame yuanbao beam can increase the vehicle body rigidity by approximately 30%, optimize the tire grip, and especially maintain vehicle stability when taking high-speed turns.
The structure of the intaglio beams varies greatly among different car models. For instance, the full-frame intaglio beams (such as those in the BMW 3 Series and Audi A4) use a closed metal frame, which can filter out 70% of the vibration. In contrast, the half-frame intaglio beams (like those in the Volkswagen Sagitar and Nissan Sylphy) have a simple structure and poor cornering stability.
The subframe of a car, also known as the "Yuanbao beam", is a bracket structure that connects the front and rear axles, suspension and the main frame of the vehicle body. It mainly serves to support, connect and buffer.
Core function
Youdaoplaceholder0 Support and connection
The Yuanbao beam supports and fixes components such as the engine and transmission through the bracket structure, and at the same time connects the suspension system with the main frame of the vehicle body, ensuring the stability of the vehicle during driving.
Youdaoplaceholder0 block vibration and noise
By using cushioning components such as rubber bushings, the vibrations transmitted into the cabin from engine shaking and road bumps are reduced, enhancing the driving and riding comfort.
Youdaoplaceholder0 enhance the body strength
It connects the vehicle body components laterally, disperses the impact force of the collision, and protects key components such as the oil pan and engine from direct damage.
Structural type
Youdaoplaceholder0 Full-frame intage-shaped beam : A metal frame with closed edges on all four sides, providing the best vibration filtering effect (such as in models like BMW 3 Series and Audi A4).
Youdaoplaceholder0 half-section ingot beam : The structure is simplified and the cost is lower (such as in models like Volkswagen Sagitar and Nissan Sylphy), but the collision protection and handling performance are relatively weak.
Material differences
Youdaoplaceholder0 steel : low cost, easy to repair, but heavy (40-50 kilograms) and prone to rust.
Youdaoplaceholder0 aluminum alloy : light in weight (reduces fuel consumption and pressure on the suspension system), but relatively expensive.
The damage to the Yuanbao beam (subframe) needs to be determined based on specific circumstances to determine whether it is an accident vehicle or a quality issue
Whether it belongs to an accident vehicle
If the Yuanbao beam is damaged due to a collision, the vehicle will be regarded as an accident vehicle. It is usually manifested as:
There are traces of spray painting repair on the exterior
The airbag deploys or is replaced
The vehicle body structural components (such as the ingot beam) are repaired by cutting and welding
Whether it is a quality issue
If the Yuanbao beam is damaged due to rust, material defects or other issues, it may be a quality problem. For example:
The rusting of important structural components of the vehicle body (yuanbao beam) shall be the responsibility of the manufacturer
If the new car yuanbao beam makes abnormal noise or is damaged, the manufacturer shall be held responsible
Common fault manifestations
Youdaoplaceholder0 Abnormal noise : Metallic knocking sounds occur while driving (more obvious on speed bumps and potholes)
Youdaoplaceholder0 vibration : The steering wheel feels a fine vibration
Youdaoplaceholder0 Rust : Rust on the surface of the yuanbao beam (timely treatment is required to prevent a decrease in structural strength)
It is recommended to contact the 4S store or a professional institution for inspection. After clarifying the cause of the damage, negotiate a repair plan.
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