General car body has three columns, front column (A column), middle column (B column), rear column (C column) from front to back. For cars, in addition to support, the column also plays the role of the door frame.
The front column is the left and right front connection column that connects the roof to the front cabin. The front column is between the engine compartment and the cockpit, above the left and right mirrors, and will block part of your turning horizon, especially for left turns, so it's discussed more.
The Angle at which the front column blocks the driver's view must also be taken into account when considering the front column geometry. Under normal circumstances, the driver's line of sight through the front column, the binocular overlap Angle of the total is 5-6 degrees, from the driver's comfort, the smaller the overlap Angle, the better, but this involves the stiffness of the front column, not only to have a certain geometric size to maintain the high stiffness of the front column, but also to reduce the driver's line of sight occlusion influence, is a contradictory problem. The designer must try to balance the two to get the best results. At the 2001 North American International Auto Show, Sweden's Volvo launched its latest concept car SCC. The front column was changed to a transparent form, inlaid with transparent glass so that the driver could see the outside world through the column, so that the blind spot of the field of vision was reduced to a minimum.
