The power transmission

device between the car engine and the drive wheels is called the car's drive train. It should ensure that the car has the necessary traction force and speed under various driving conditions, and ensure the coordinated change between the traction force and the speed of the car, so that the car has good power and fuel economy; It should also ensure that the car can reverse, and The left and right drive wheels can adapt to the differential speed requirements and enable the power transmission to be smoothly combined or completely and quickly separated as required. The drive train includes clutches, transmissions, drive shafts, final gears, differentials and axle shafts. The power transmission device between the car's engine and the drive wheels is called the car's drive train.


Driving

system The functions of the driving system of the vehicle chassis are: Receive the power of the drive train, generate traction through the action of the driving wheel and the road surface, so that the vehicle can run normally; Bear the total weight of the vehicle and the reaction force of the ground; Alleviate the impact of uneven road on the body Impact, attenuate the vibration of the car during driving, and maintain the smoothness of the ride; cooperate with the steering system to ensure the steering stability of the car. Common travel systems include wheeled, half-tracked, wheel-tracked, and waterway dual-purpose types, but the most widely used is obviously the wheeled travel system. The wheeled driving system is mainly composed of frame, axle, suspension and wheels.

Functions:

1. Through the adhesion between the wheels and the road, the torque from the drive train becomes the driving torque of the car.

2. Support the total mass of the car and transmit various forces and moments acting on the wheels by the road surface.

3. Mitigate impact, reduce vibration, and ensure the smoothness of the car; the driving system also cooperates with the steering system to ensure the steering stability of the car.


steering system

In the process of driving, the car needs to change its driving direction frequently according to the driver's will, which is the so-called car steering. As far as wheeled vehicles are concerned, the way to realize the steering of the vehicle is that the driver makes the wheels (steering wheels) on the steering axle (usually the front axle) of the vehicle deflect a certain angle relative to the longitudinal axis of the vehicle through a set of specially designed mechanisms. When the car is driving in a straight line, the steering wheel is often affected by the lateral interference force of the road surface, and automatically deflects to change the driving direction. At this time, the driver can also use this mechanism to deflect the steering wheel in the opposite direction, so as to restore the original driving direction of the car. This set of special institutions used to change or restore the driving direction of the car is called the car steering system (commonly known as the car steering system). Therefore, the function of the car steering system is to ensure that the car can be steered and driven according to the driver's will. The steering system of the car is very important to the driving safety of the car, so the parts of the car steering system are called security parts.

The brake system

is a series of special devices that can force the speed of the car to decrease. The braking system is mainly composed of four parts: energy supply device, control device, transmission device and brake. In order to ensure the safe driving of the car, increase the average speed of the car, and improve the transportation productivity, special braking mechanisms are installed on all kinds of cars. Such a series of specialized devices is called a braking system. The main function of the braking system is to decelerate or even stop the running car, keep the speed of the car running downhill stable, and keep the stopped car stationary.