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According to the impact on the driving performance of the car, the automotive electronic products can be classified into two categories: one is the automotive electronic control device, the automotive electronic control device should be used in conjunction with the mechanical system on the car, that is, the so-called "electromechanical combination" of automotive electronic devices; They include engine, chassis, and body electronic controls. For example, electronic fuel injection system, brake anti-lock control, anti-skid control, traction control, electronic control suspension, electronic control automatic transmission, electronic power steering, etc., the other is the automotive electronic device, the automotive electronic device is the electronic device that can be used independently in the automotive environment, it has no direct relationship with the performance of the car itself. They include vehicle information systems (driving computers), navigation systems, car audio and TV entertainment systems, vehicle communication systems, Internet access equipment, etc.
In 2008, the direction of electronic technology development toward centralized integrated control development: the engine management system and automatic transmission control system, integrated power transmission system control (PCM); The brake anti-lock control system (ABS), traction force control system (TCS) and drive anti-slip control system (ASR) are integrated for braking control. Through the central chassis controller, the braking, suspension, steering, power transmission and other control systems are connected through the bus. Through complex control operation, the controller coordinates the subsystems to control the driving performance of the vehicle to the best level, forming an integrated chassis control system (UCC).
Due to the rapid increase in the number of electronic and electrical devices on the car, in order to reduce the number and weight of connection wires, network and bus technology has been greatly developed during this period. Bus technology is to connect various automotive electronic devices into a network, sending and receiving information through the data bus. In addition to completing their own control functions independently, electronic devices can also provide data services for other control devices. Because of the use of network design, the wiring is simplified, the number of electrical nodes and the amount of wires are reduced, the assembly work is more simplified, and the reliability of information transmission is increased. Through the data bus, any electronic control device can be accessed, and the fault code can be read for fault diagnosis, which makes the vehicle maintenance easier.

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