The second stage of automotive ECU development - Automotive body network system Chengdu Panfeng Technology

The second stage of automobile development - Automobile body network system Chengdu Panfeng Technology
With the development of software and hardware technology, especially with the introduction of bus technology, such as the bus system logo that appeared in the early 1900s the second stage of development. Automotive electronic network technology not only accelerates the application of new technologies but also saves costs. For example, multiple sensors can share the signal from one sensor without complicated and expensive wiring. The addition of new capabilities is easier and more cost-effective because of the extensive data sharing available over the network. The current diversification and rapid growth of automotive electronic functions are closely related to the widespread application of automotive network technology. Thanks to the support of automotive network technology, modern automotive electronic systems have achieved low cost, high flexibility and scalability.
The second stage of automobile development - automobile body network system Chengdu Panfeng Technology
With the development of automobile electronic technology and the intensification of market competition, there are usually more than one electronic control unit on cars for monitoring and Control each subsystem. In the early days of automotive electronics development, these worked independently. This makes it easier to divide the functions of each subsystem. These electronic control units can be roughly divided into three categories: power transmission device control (such as engine control and transmission control), chassis part control (such as automobile anti-lock braking system) and body control. Among them, the body control system is mainly to improve driving convenience and riding comfort. The body control system covers a wide range, including lighting control system, door control system, seat control system, climate (air conditioning) control system, instrument panel display, etc. The editor of Chengdu Panfeng Technology selected control nodes such as lights, wipers and solenoid valves in the chassis to explain how the automobile body network system implements a distributed control scheme.
System structure
The functions to be implemented by this system are as follows:
* Control all lights on the car.
* Control rain
The brush works at low speed, high speed and intermittently.
* Control the operation of the solenoid valves connected to the power take-off, all-wheel drive, inter-wheel and inter-axle differentials.
*Respond to the action of cab control switch in real time.
* Lighting self-check function.
* Fault diagnosis and positioning capabilities.
The second stage of automobile development - automobile body network system Chengdu Panfeng Technology
The system adopts a distributed structure because the body control system has many control objects and their locations are dispersed. If a point-to-point centralized control method is used to control the module and A large number of cables are needed to connect the controlled objects, which will inevitably lead to complex manufacturing and installation difficulties in the wiring in the car, and there will be potential faults. The distributed system structure can design the control module according to the location of the control object, thereby shortening the distance between the control object and the control module. Each module communicates through the bus. This method only requires one wire as the communication line, plus a ground wire and a power wire. A total of three wires simplifies wiring and makes the system structure clear. At the same time, the distributed system structure increases the flexibility of the system and can easily add or remove nodes. In addition, the distributed system structure also reduces the quiescent current of the single board and increases the stability of the single board.
The second stage of automobile development - automobile body network system Chengdu Panfeng Technology
At present, the entire automobile electronic system is usually composed of ~ networks. They usually consist of powertrain network (high-speed network), comfort system network ( Medium and low speed network) and infotainment system network (multimedia network). They are interconnected by gateways to form an integrated vehicle network. In terms of high-end technology, the development and maturity of time-triggered bus technology represented by r-bus will promote the development of safety-related steering control and other functions. Low-end bus applications will become more widespread and there will be more low-cost nodes integrating sensors/actuators.