为了降低用户界面层，感知控制代理层以及功能核心层之间的耦合度，该模型还在它们之间分别加入了用户任务数据总线与应用领域数据总线。

In addition, the model using the user task date bus and application domain date bus to reduce the coupling between the user interface and function core.

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PC I AD总线再复用模型不仅可以保证功能正确，而且节约了32根管脚资源，进而缩小了芯片面积，降低了设计成本。

While working normal, the model can decrease 32 pins that decrease the area of the chip, and decrease the design cost.

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本文首先介绍了CAN网络模型中各层的功能和层次结构，设计了基于CAN总线的汽车控制系统模型。

This article firstly introduced the layers structure and each layer function of CAN-bus's network model and designed the automobile control system model based on CAN-bus.

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