As technology continues to advance, the design and manufacture of cars are becoming more sophisticated. In modern cars, there are five major assemblies and eight major systems that play a key role.

The five assemblies are the engine assembly, the steering machine assembly, the transmission assembly, the front and rear axle and the frame.
First, the engine assembly, also known as the engine, is the heart of the car, which converts chemical energy into mechanical energy, providing the driving force. Secondly, the direction machine assembly, also known as the steering device, it changes the direction of force transmission, so that the driver can easily control the steering of the car.
Third, the transmission assembly, that is, the gearbox, which can fix or shift the transmission ratio of the output shaft and the input shaft to meet the needs of different driving conditions. Then, the front and rear axles are an important part of the vehicle, with the front axle transmitting force and generating bending moments and torque, while the rear axle is responsible for driving the vehicle.
Finally, the frame takes on the important task of connecting the various assemblies, while supporting the load of the car and resisting the impact from the wheels.
The eight major systems include power system, transmission system, driving system, braking system, steering system, lighting system, electrical system and fuel supply system.
First, the powertrain is the source of the car's power, including the engine and drivetrain, which cooperate to provide enough power to drive the car forward. Secondly, the transmission system controls the speed and steering of the car, ensuring the efficient transmission of power and making driving smoother.
Then, the driving system involves components such as wheels, suspension and tires, which play an important role in the handling performance and driving comfort of the car. The braking system is used to slow down and stop the car, ensuring the safety of the driver. The steering system is responsible for controlling the direction of the car, so that the driver can operate the car flexibly.
The lighting system provides lighting and signal indication functions to ensure driving safety. Electrical systems include electronic devices such as batteries, generators, and wiring to provide power for the various functions of the car. Finally, the fuel supply system is responsible for providing fuel to the engine to ensure the normal operation of the engine.





