单片机的发动机冷却水温自动监测系统设计.doc

摘 要：随着能源日益紧张,人们对发动机时的舒适性日益重视,有关发动机冷却水温的研究得到了越来越多科研机构的重视。因为冷却水温与发动机的许多工作性能有着直接或间接的联系,如果冷却水温保持在最佳的温度范围内,不仅可以提高发动机的动力性、减少废气的产生、还可以减少燃料消耗量、增强发动机工作平稳性。所谓最佳温度范围指冷却水温保持在此温度范围内,发动机工作的整体经济性最好。而确定此最佳冷却水温范围,只有经过大量的检测实验和数据分析才能得出。检测冷却水温对发动机零件磨损、功率、工作噪声、排气质量、润滑油质量、使用寿命、工作粗暴性等的具体影响,然后通过比较分析得出最佳温度范围。进行这些发动机性能测试实验的必备条件是有一个能检测并控制冷却水温在设定范围内的控制装置,研究并试制这样一个自动控制装置就是本课题的研究目的。本文介绍了一种基于MCS－51系列单片机的发动机冷却水温自动监测系统的设计，该系统实现了对监测到的水温进行及时采集和智能化处理的功能。简述了其工作原理、硬件系统及软件编程思路。 关键词：冷却水温，单片机，A/D转换器、发动机 、MCS－51 Summary：With the increasingly tense energy, people comfort when the engine increasing attention, the engine cooling water temperature of gaining more and more attention to scientific research institutions. Because many of the engine cooling water temperature and the performance has a direct or indirect contact, if the cooling water temperature maintained at optimum temperature range, not only can improve the engines power Xing, Jian Shao gas production, also can reduce fuel consumption, Zeng Qiang engine stationary work. The so-called optimal temperature range means cooling water temperature maintained at this temperature range, the overall economy of the engine work the best. And determine the optimal cooling temperature range, only after detection of a large number of experiments and data analysis in order to obtain. Detection of the cooling water temperature on the wear of engine components, power, work noise, exhaust quality, oil quality, life, work and so the specific impact of the gross, and then analyzed by comparing the optimum temperature range. Engine performance tests for these experiments is a necessary condition to detect and control the cooling water temperature in the range of set of control devices, research and trial of such a control device that is the subject of research purposes. This paper introduces a microcomputer-based MCS-51 series engine cooling water temperature automatic monitoring system, the system realized the water temperature was monitored for timely acquisition and