CAN-bus technology is the abbreviation of on-board controller networking technology integration. The Chinese interpretation of can is - controller networking technology, including drive system, comfort system and information system. Can is essentially a real-time data bus. Without giving the address of the signal receiver, the signal sender can send the safely encoded data to all receivers. The high-speed can bus can transmit 32bytes of effective data every millisecond, and each signal receiver can read the required data from the bus by itself. Due to its strong anti-interference ability and error correction ability, can technology is widely used in the communication of missile, aircraft and tank electronic systems by the U.S. military.
The earliest application of CAN-bus technology in automotive communication electronic system is Europe, which is specially equipped with high-end models. BMW 7 series, Mercedes Benz S series, Audi A6 and other models are equipped with CAN-bus system. The biggest advantage of CAN-bus technology equipment is that it reduces the number of harnesses and the number of pins of controller interface, so as to speed up the transmission speed of information and data and reduce transmission errors. At the same time, online programming and diagnosis can be realized more simply and quickly, and new functions such as the joint action of multiple controllers can be realized. The communication nodes in CAN-bus technology are controller, intelligent sensor and intelligent execution unit. The main function of this technology is to use a few communication nodes to realize the sharing of data and information of the whole vehicle.
The whole vehicle data sharing realized by CAN-bus system makes the vehicle equipped with the system an intelligent whole, so it has the ability of self-regulation. For example, for a car equipped with CAN-bus, when the engine stops, the comfort system of CAN-bus will automatically be in the sleep state, and the whole system will be in the lowest power consumption state, so as to save energy consumption. Once the door opening signal is received, there is no need to start the engine, the system will be awakened and activated immediately, and begin to receive the information transmitted by various nodes to adjust the whole vehicle to the best working state. The highly intelligent CAN-bus technology is like a shrewd housekeeper who takes care of the myriad of things in a big family in an orderly manner.
