随着汽车电子技术的迅速发展,汽车上的电子控制系统功能的增强,系统结构越来越复杂。许多中高级轿车上采用了十几个甚至二十几个电控单元,而每一个电控单元都需要与相关的多种传感器和执行器发生通讯,并且各种电控单元间也需要进行信息交换。如果每项信息都要通过各自独立的数据线进行传递,则整个电控系统需要大量的线束和插接件,增加了系统的诊断难度和车质量,同时也提高了成本。德国 BOSCH 公 With the rapid development of automobile electronic technology, the function of electronic control system in automobile is enhanced, and the system structure is more and more complicated. Many high-class cars on the use of a dozen or even twenty electronic control unit, and each ECU requires a variety of sensors and actuators associated with the communication, and a variety of electronic control unit also need information exchange. If each piece of information is to be routed through separate data lines, the entire electrical control system requires a large number of harnesses and connectors, increasing the system’s diagnostic difficulty and vehicle quality, while also increasing costs. Germany BOSCH public