Automobile structural design automotive electronic control experimental teaching system

The improvement of automobile body electronic network control system technology has attracted a lot of attention from many people. Today we will talk about the overall structural design of the entire vehicle management system. How to use high speed in automobile drive system?
High speed is used in the automobile drive system, and its main connection objects are the engine automatic transmission/airbag active suspension cruise system electric steering system and instrument cluster signal acquisition system. The control objects of the drive system are all systems and industrial automation networks that are directly related to vehicle driving control. They have strong real-time requirements for signal transmission. There is a lot of information exchange between them, and many of them are continuous and high-speed. of.
How to use low speed in the body system?
The body system adopts low speed, and the main connection objects are the front and rear light control switch, the electric seat control switch, the central door lock and the anti-theft control switch, the electric rearview mirror control switch, the electric window lift switch, the climate and air conditioning control switch, the fault diagnosis system combination Switches and driver control signal acquisition system instrument displays, etc. The control objects of the body system are mainly low-speed motor solenoid valves and switching devices. They do not have high real-time requirements for information transmission, but they are large in number. Separating these electronic control units from the vehicle drive system will help ensure the real-time adoption of the drive system. The low-speed bus can also increase the transmission distance of the bus, improve anti-interference capabilities, and reduce hardware costs.
Will the two lines, high speed and low speed, affect each other?
The two buses are independent of each other, and perform data exchange and resource sharing through the gateway server. The central controller is the control core of the vehicle management system and the basis for comprehensive vehicle control. Its main function is to analyze and process various information and issue instructions to coordinate the work of various control units and electrical equipment of the vehicle. At the same time, the central controller is also the gateway server for high-speed bus and low-speed bus.
The coordination relationship between the engine controller, automatic transmission controller, airbag controller, etc. requires strong real-time performance, and simple events such as the switching of front and rear lights, door opening and closing, and seat adjustment cause delays in information transmission. The transmission delay requirements are much looser. The sensitivity of various electrical appliances in the car to the network information transmission delay is very different. If these nodes with simple functions are hung on the high-speed bus, the technical requirements and costs of the nodes will inevitably increase. Therefore, it is necessary to carry out multi-channel bus design. Taking into account the consistency with international standards, a bus is used here.
The stability of car bodies has gradually been valued by car owners and car manufacturers. Living standards have improved. People pursue comfort and convenience, but they absolutely require safety. Therefore, body stabilization system technology Become a focus of automotive technology level. Now, let's follow Chengdu Panfeng Technology to learn about the automobile body electronic stability system.
How does the car body stability system work?
Chengdu Panfeng Technology Engineer introduced that when the car is driving normally, the system will use sensors to continuously collect information parameters of the car's operating status. For example, when the car is turning, if the car understeers or overturns, , the body network stabilization system will take effect. Below, the editor of Chengdu Panfeng Technology will give you an example to introduce the working principle of body electronic control technology.
The role of First Automobile's electronic body stability system in preventing car oversteer
When the car's body stabilization system faces oversteer, the car uses this function to increase the lateral adhesion of the rear axle. , the turning torque is automatically reduced, however, a yaw moment is produced in the direction opposite to the direction of excessive steering. In this case, the front wheels of the car will be subject to instantaneous braking by the control system, resulting in a higher slip rate, resulting in a rapid reduction of the lateral force on the wheels.
The second car body stabilization system controls the car when the car understeers
When the vehicle understeers, the rear wheels on the inside of the curve are automatically controlled by the control system. In order to obtain the desired East China rate, the lateral force on the braked wheel is reduced. At the same time, because the wheels are in the same direction as the yaw direction, the vehicle speed will slow down due to braking. At the same time, under the action of the differential, the outside wheel of the car is accelerated in disguise, so the lateral force on the outside rear wheel is reduced. Drive increases instead.