When it comes to a car's chassis, many people find it confusing and don't know where is it.

For instance, some individuals mistakenly consider the car's floorboard as the chassis, even assuming that rust on the floorboard means the chassis itself is corroded. In actuality, the car's chassis is commonly referred to as the chassis system of the vehicle.

Some individuals mistakenly consider the car's floorboard as the chassis, even assuming that rust on the floorboard means the chassis itself is corroded. In actuality, the car's chassis is commonly referred to as the chassis system of the vehicle.

The structure of an automobile chassis can be divided into four main components: the transmission system, the drive system, the steering system, and the braking system.

The transmission system mainly includes the transmission's power flow through the drive shaft, drive axle, differential, and half-shaft to the entire wheel system.

The drive system, also known as the suspension system of the vehicle, provides support to the wheels.

The steering system encompasses the path from the steering wheel to the transmission linkage for steering the vehicle.

The braking system consists of brake hydraulics, the control system, and complex electronic control systems such as ABS and ESP.

Generally, an automobile's chassis comes in two main forms: non-load-bearing and load-bearing.

On the one hand, the non-load-bearing chassis is commonly found in large vehicles like trucks and buses, as well as some off-road vehicles. It is characterized by a chassis beam frame where the engine and transmission are not installed within the frame.

This type of chassis offers advantages such as high strength, a great load capacity, excellent shock resistance, and the ability to evenly distribute uneven forces across all four wheels, preventing the body from distorting or deforming.

Hence, non-load-bearing chassis is primarily used in trucks and large vehicles. However, it tends to be bulkier and heavier, making it unsuitable for most family cars.

On the other hand, family cars typically utilize a load-bearing chassis, which means the entire vehicle has a shell structure that houses the engine, transmission, suspension, and tires.

In essence, the load-bearing chassis resembles a beetle, with the body shell serving as the overall support structure, in contrast to the non-load-bearing chassis, which is more like an elephant with an internal skeleton providing support.

One of the most crucial elements within the chassis is the suspension system. The suspension system connects the car's wheels to its structure, significantly impacting safety, handling, and comfort. A well-designed suspension system contributes to a smoother and safer ride.

The suspension system performs several key functions:

1. It absorbs the vertical, longitudinal, and lateral forces exerted on the wheels by the road, transmitting them to the chassis or load-bearing body to ensure the car's normal operation.

2. The suspension system employs elastic components and dampers to dampen vibrations and provide a smoother ride.

3. Certain suspension components facilitate controlled wheel movement relative to the chassis or body, guiding the wheels along a specific trajectory.

4. Additional elastic elements, like lateral stabilizers, help prevent excessive lateral tilting of the vehicle during steering and other driving conditions.

Understanding the role of the chassis and its key components, such as the suspension system, is essential for appreciating a car's performance, safety, and comfort.