基于SAE J1939协议诊断部分的DM协议完成对商用车故障诊断系统的开发思路,并描述基于CANoe平台的设计过程,在Visual Studio 2013环境中运用C#设计开发了故障诊断系统生成工具。经验证,故障诊断系统能够按照SAE J1939协议进行实时故障代...基于SAE J1939协议诊断部分的DM协议完成对商用车故障诊断系统的开发思路,并描述基于CANoe平台的设计过程,在Visual Studio 2013环境中运用C#设计开发了故障诊断系统生成工具。经验证,故障诊断系统能够按照SAE J1939协议进行实时故障代码的接收和发送,通过查看历史故障码及其发生次数对相应部件的性能进行评估,避免潜在故障的发生。展开更多
This paper describes the control and communication network in fuel cell vehicles, including both the protocol and the hardware. Based on the current protocol (ISO-11898 and SAE J1939), a new practical protocol is prop...This paper describes the control and communication network in fuel cell vehicles, including both the protocol and the hardware. Based on the current protocol (ISO-11898 and SAE J1939), a new practical protocol is proposed and implemented for the control and communication network in fuel cell vehicles. To improve the re-liability of data communication and to unify the network management, a new network system based on dual-port RAM is also implemented.展开更多
文摘基于SAE J1939协议诊断部分的DM协议完成对商用车故障诊断系统的开发思路,并描述基于CANoe平台的设计过程,在Visual Studio 2013环境中运用C#设计开发了故障诊断系统生成工具。经验证,故障诊断系统能够按照SAE J1939协议进行实时故障代码的接收和发送,通过查看历史故障码及其发生次数对相应部件的性能进行评估,避免潜在故障的发生。
文摘针对非道路车辆尾气排放测试中常采用的一种便携式车载尾气排放测试系统(Portable Emissions Measurement System,PEMS)不能实时显示试验状态以及进度,造成试验冗余或不足等问题,设计了一种PEMS试验远程监测系统。该系统由车载端与远程端两部分组成,在基于SAE J1939通信协议下,车载端以C8051F120单片机为主控单元(Main Control Unit,MCU),实现了发动机电控单元(Electronic Control Unit,ECU)数据的解析、CAN总线上数据报文的接收与发送;远程端由C++Builder软件开发平台设计了一款人机交互界面,实现了发动机状态参数的实时显示、有效工作事件的筛选、试验累积功的计算以及试验进度显示等功能;同时车载端与远程端之间以无线方式进行通信。试验结果表明,采用本系统所得到的试验累积功的综合误差在±1.25%之内,证明所设计的系统不仅功能丰富而且具有较高的实时性、可靠性与稳定性,提高了PEMS试验的效率,具有较好的现实意义。
基金Supported by the National High-Tech Research and Devel-opment (863) Program of China (No. 2001AA501100)
文摘This paper describes the control and communication network in fuel cell vehicles, including both the protocol and the hardware. Based on the current protocol (ISO-11898 and SAE J1939), a new practical protocol is proposed and implemented for the control and communication network in fuel cell vehicles. To improve the re-liability of data communication and to unify the network management, a new network system based on dual-port RAM is also implemented.