What does the ABC column of a car mean? What is the use of the ABC column of a car?

When we learn about some car parameters, we often hear about the car's A-pillar, B-pillar and C-pillar. The abc pillars of a car have different functions for the car body, and the materials used are generally high-strength materials. So what are the uses of the abc pillars of a car?

What does the ABC column of a car mean?

A-pillar

It is the pillar on both sides of the front windshield, located between the engine compartment and the passenger compartment. In addition to connecting the roof to the body, the A-pillar of the car can also withstand the impact of a head-on collision, protect the cab from deformation, and prevent wheels, suspension, etc. from invading the cab.

B-pillar

It refers to the pillar between the front and rear doors of a car. It stands tall on the car, supporting the roof above and connecting to the floor below, like the mainstay of the car.

C-pillar

It refers to the pillars on both sides of the rear windshield. When we sit in the back seat of the car, the big pillars on both sides of the headrest are it.

What is the use of the abc column of a car

A-pillar

When a frontal collision occurs, the anti-collision steel beam at the front of the vehicle absorbs the energy first, and then the two front longitudinal beams collapse to absorb the energy. The remaining collision energy will be transmitted to the passenger compartment, first received by the A-pillar, and then dispersed to the entire body. In this case, the A-pillar plays a very important role. First, it must ensure that it does not deform and protect the integrity of the passenger compartment, and then transmit the force.

They are generally made of stamped high-strength steel plates. Some models that pay more attention to vehicle safety will also use ultra-high-strength hot-formed steel to make the A-pillar.

B-pillar

The B-pillar can improve the strength and rigidity of the passenger compartment and cope with side collisions. When a car is hit by a side collision, the collision force will directly act on the B-pillar. If it is not strong enough, it will deform or break in the collision, and external objects will directly invade the passenger compartment, posing a threat to the occupants in the car; in addition, if the passenger compartment is deformed, it will compress the living and activity space of the occupants in the car, increasing the probability of casualties.

The B-pillar of a general car is made of ultra-high-strength hot-formed steel, which can be said to be the hardest part of the car.

C-pillar

On the one hand, its function is to connect the roof and the body of the car. On the other hand, it will also bear a certain amount of collision energy in a rear collision of the car to protect the structural safety of the passenger compartment.

However, there are many structural parts at the rear of the car, and the collision energy that the C-pillar needs to bear is not large, so it is generally made of ordinary high-strength steel, and hot-formed steel is rarely used.

In addition, the C-pillar of today's cars plays an important role in the car's styling design. A perfect design will greatly improve the car's appearance.

What are the parts of the basic structure of a car?

Most of today's passenger cars use a body-on-frame structure, which is characterized by the absence of an independent frame and the entire body components participating in the load-bearing.

The car body is mainly composed of a bottom plate, a frame, inner and outer skins, etc., which are welded into a rigid frame structure and can be roughly divided into three parts: the engine compartment, the passenger compartment and the luggage compartment. The main load-bearing components are the "four beams and six pillars", namely two front longitudinal beams, two rear longitudinal beams, two A-pillars, two B-pillars and two C-pillars.

From this we can see that the A-pillar, B-pillar and C-pillar of the car are important components of the load-bearing body passenger compartment and are also the main load-bearing components of the car, so the requirements for them are extremely high.

Some large SUVs, MPVs and other models also have a D-pillar, which is located behind the C-pillar and has a similar function to the C-pillar, mainly supporting the roof. When the car rolls over or is crushed by heavy objects, these pillars work together to protect the passenger compartment from deformation and to minimize casualties of the occupants.