Among the 1 and ABC pillars, pillar A plays a crucial role. At present, most cars adopt load-bearing body structure, and the whole body plays the role of frame and bears all the loads. The existence of A-pillar makes the load-bearing car body structure have higher stability and car body stiffness. In the face of frontal collision, A-pillar is the main component, which can protect the cockpit and reduce deformation, and plays an important role in the safety of drivers and passengers.
2. Look at the B-pillar again. B-pillar not only supports the roof, but also supports the front and rear doors. Some additional components, such as seat belts in front seats, are installed on the B-pillar, which sometimes wears the wires and harnesses. Therefore, most B-columns have convex radius to ensure good force transfer performance;
3. The difference between C-pillar and A-pillar and B-pillar is that there are no problems such as line of sight occlusion, getting on and off the bus, so it is no harm to have a larger structural size. The key is that the seal between the C-pillar and the car body should be reliable.