Column 1.A / B pillar / C pillar / D column
A column , is connected to the left and right front pillars and a roof connected to the front hatch, in the engine compartment between the cockpit and above the left and right rear-view mirror, you will block part of the turning horizon, especially the left turn.
In general, the driver’s line of sight through the A-pillar, 5 — binocular overlap angle 6 degrees, if the start angle according to the driver’s comfort, the overlap angle as small as possible, the A-pillar the thinner the better, but in the eyes of the designer needs to have a balance, it is clear that he had to ensure high rigidity of the a-pillars to reduce security risks, so from this point of view, the a-pillar is not as small as possible.
B column in the cockpit between the front and rear seats, Flanagan is longitudinally between the two doors on both sides of taping, extending from the roof to the bottom of the vehicle, viewed from inside , B-pillar in the seat belt.
C column on both sides of the headrest in the back seat. C-pillar of the car will be larger dip, hatchback and SUV, the C-pillar relatively few will be more upright.
Column D , is generally common in SUV and MPV models, and the rear roof compartment of the vehicle body direct connection.
A pillar, B pillar, C-pillar and D-pillar is the main part of the structural strength of the vehicle support. The higher the intensity, the stronger the Body shock survivability.