电子设计应用2004年第9期

摘要：随着车内电控单元的增加，车内通讯网络也日趋多样化。汽车电子协会（SAE）将车内通讯网络分成四类，其中A类低速网络主要应用在灯光控制，车门车窗控制等车身控制。LIN(Local Interconnect Network)是多家汽车制造商和半导体公司为降低通讯成本提高性能所提出的符合A类的通讯标准。LIN以其通讯成本低，开发方便等优势在车身控制方面有着良好的应用前景。本文对LIN总线进行了详细的描述，并以灯光控制为例说明LIN总线在车身控制中的应用。

关键词：车内通讯网络 LIN总线 车身控制 灯光控制

The Application of LIN Bus in Automotive Body Control

Abstract：With the increasing of Electronic Control Unit (ECU) in vehicle, communication networks in vehicle are in variety. The Society of Automotive Engineers (SAE) classified in-vehicle networks into four classes, in which the Class A for low-speed networks mainly apply for body control system such as light control, doors and windows control. In order to reduce costs and enhance performance, many automotive manufactures and semiconductor companies created a new communication standard in line with Class A, that is LIN (Local Interconnect Network). LIN is a low-cost and easier development network, which will well apply for body control system. This paper describes LIN bus in detail and explains LIN bus how to apply for automotive body control by the example of light control.

1. 引言

由于车内电控单元的增多导致车内线束大量增加，这带来了很多问题：减少了布局空间；

给制造和安装增加了难度；当增加额外的功能时将会增加线束，使性价比难以改善；大量线束增加了车的重量，这不利于提高燃油效率和性能；数量众多的连接点增加了故障隐患。因此车内引入通讯网络来管理逐渐增多的电子器件是非常必要的。汽车网络能够灵活方便的集成各子系统从而实现更复杂的系统，同时减少了车内线束和车重量，减少了由电控单元带来的成本的增加，并且提高了系统的可靠性。车内通讯网络种类很多，汽车电子协会（SAE