The chassis of a car consists of four parts: transmission system, driving system, steering system, and braking system. The chassis function is to support and install the car engine and its various components and assemblies, form the overall shape of the car, and receive the power of the engine to make the car move and ensure normal driving.

The power emitted by the car engine is transmitted to the driving wheels through the transmission system. The transmission system has functions such as deceleration, shifting, reversing, interrupting power, wheel differential, and axle differential. It works in conjunction with the engine to ensure the normal driving of the car under various working conditions, and has good power and economy.

To maintain the chassis in winter, it is necessary to thoroughly clean and rust proof the chassis. Firstly, the chassis needs to be thoroughly cleaned. If there is too much mud on the chassis, it should be washed with a degreasing cleaning agent to expose its original "natural color" before rust prevention care can begin. In a professional beauty salon, the car can be lifted onto a lifting platform for chassis cleaning, wiping, and rust prevention care. It should be noted that after cleaning, it is necessary to wait until the moisture on the chassis is completely dry before carrying out rust prevention care. When carrying out care, it is important to maintain a uniform spray coating to form a long-lasting and uniform rust proof coating. After completion, natural air drying should be carried out for 5-10 minutes to complete the chassis rust prevention treatment.