汽车喷油控制系统设计.doc

摘 要 随着国际社会对世界环境问题的关注，人们对汽车排污问题越来越重视，汽车排放法规也更加严厉，国际上兴起了以发动机电子控制为核心的汽车电子燃油喷射技术。这种技术能使汽油机在动力性、经济性、排放性等方面均获得很大的提升，是唯一能够适应现代社会对汽车各种使用工况需求的技术。 本文主要是在借鉴国内外先进电喷技术的基础上，对汽油机电控单元的硬件与软件开发技术进行分析和设计。汽油机电子控制的关键技术是汽油机电子控制单元(ECU)的软件、硬件的开发，通过对其硬件电路和软件程序的不断改进，逐步满足汽车电子各方面更加精确控制的要求。结合我国当前排放法规的要求和燃油品质的现状，分析了汽油机电控技术和发动机的具体情况，主要以INTEL的80C196KB单片机为主芯片，设计了喷油控制系统的软件和硬件，硬件电路图和喷油主程序、脉宽计算程序、A/D转换程序和转速计算程序在内的软件。该系统经运行调试后，基本可以实现发动机的喷油要求，为后续发动机电控单元的设计、应用提供了一定的参考。 关键词: 汽油机；80C196KB；电控单元；喷油系统 Abstract As the vehicle mission regulation becomes strieter，the vehicle electronic Control technology as the key of engine control comes to be more and more Popular in the world. This key technology is the unique technology fitting or the require of the using of vehicle in the model society for it had made a great Progress in the Power，economic，emission etc. This Paper will focus on the analysis and development on the hardware and Software of ECU based on the reference of foreign advanced ECU technology. The key of the engine electronic control is to develop the hardware and software of ECU. The gradual development of the hardware and software will meet the need of more accurate control for the vehicle electronies. Combined with the request of current emission regulation and fue qualify，it analyzes the ECU technology and the real environment of engine，then designs the hardware and software of the fuel injection of the ECU with the 80C196KB of INTEL as the main CMOS chip. It also draws the hardware with the protel Software and designs the ASM software Proceeding etc. Hardware and software Tests how that the improved ECU can meet the basic requires of the vehiele. At the same time，gave out the reference for the design of the best ECU in the future. Key words: Petrol machine; Electronic Control Unit; Fuel Injection System 目 录 第1章 绪论 1 1.1课题的研究意义 1 1.2 国内外的研究发展现状 1 1.3本文工作内容简介 2 第2章 汽车各参数的计算与测量 3 2.1汽车运行的工况 3 2.2运行工况分析 4 2.2.1稳定工况分析 4 2.2.2 瞬态工况分析 5 2.3汽车各参数测量与设计 5 2.3.1空燃比的测量 5 2.3.2进气量的计算 7 2.3.3喷油量的计算 8 第3章 汽车