What are the functions of a car chassis?
2 Answers
The function of a car chassis is to support and install the car engine and its various components and assemblies, forming the overall shape of the car, receiving the power from the engine to enable the car to move and ensure normal driving. The car chassis consists of four parts: the transmission system, the running system, the steering system, and the braking system. Bottoming out can easily cause damage to parts located in the chassis section, such as: cracking of the catalytic converter shell, cracks in the engine oil pan, cracks in the transmission case, or deformation of the suspension system, etc. The occurrence of these problems can bring very fatal damage to the car. Generally, to prevent damage to the chassis, 4S shops will recommend that car owners install an engine guard plate or carry out chassis protection, commonly known as chassis armor, on the chassis.
As someone who has studied automotive structures, I know the chassis serves as the foundational skeleton of the entire vehicle. Its primary function is to support the body and various critical components, such as the engine, transmission, and fuel tank, all securely mounted on the chassis. This ensures balanced weight distribution, preventing instability while driving. The chassis also provides structural strength, maintaining integrity under high loads like cornering or collisions to resist deformation or collapse. The suspension system is directly installed on the chassis, absorbing shocks to ensure smooth and comfortable rides, especially reducing bumps when crossing speed bumps. Another key role is protection—the chassis guards against scrapes and impacts from below while absorbing energy during accidents to safeguard the passenger safety zone. Material selection is also crucial, with high-strength steel or aluminum alloys enhancing durability and handling performance. On long drives, these factors directly influence fatigue levels, which is why I always emphasize chassis maintenance to prevent rust from compromising performance. In short, without a solid chassis, a car is like a rootless tree, prone to collapse.
