基于胎压控制的汽车放气速度压力性能研究-机械工程专业论文.docxVIP

万方数据 万方数据 摘 要 近几年来，随着人们生活水平的提高，汽车作为家庭代步工具的现象越来越普遍。 但是，由于各种原因引起的交通事故率也随之逐年上升，其中因碰撞引起的交通事故 所占比例最大。针对这种情况，目前有两种安全措施，即 TPMS 系统和 ABS 系统。 TPMS 系统是以实时监测轮胎压力和温度来预防爆胎，ABS 系统是在汽车紧急制动时 防止轮胎抱死，保证刹车安全。在这两种方法的基础上本课题提出了一种新方法，它 是一种基于新理论的安全措施。这种新措施将来必会对人们的生命和财产安全提供有 力的保障。这种方法的思想是：在汽车即将发生碰撞时，给轮胎放一定量的气体，使 轮胎压力降低，增大轮胎与地面的摩擦力，缩短刹车距离，以减轻甚至是避免碰撞。 所以本课题的研究对象是汽车轮胎，研究内容是轮胎放气规律。 本课题是在目前较高交通事故率和两种安全措施的不足的背景下提出来的，本课 题的研究是一种探索性研究。论文介绍了轮胎放气规律研究的现状，分析了相关影响 因素载荷、放气阀阀口对放气速度大小的影响关系。为了实现对放气规律的实验性研 究，改造了原有实验台，为实验台安装了称重传感器和压力传感器，在充分了解轮胎 结构的基础上加工了轮胎，便于压力传感器和放气装置的安装。本课题通过实验台上 的可调螺丝给轮胎施加载荷，用称重传感器测量载荷大小，压力传感器实时测量轮胎 压力大小，用两位两通电磁阀气阀和放气消声节流阀组成的放气装置对轮胎进行可控 放气，借助数据采集卡和 Labviw 软件对实验进行数据采集，并用 Matlab 软件对采集 到的载荷、胎压、放气时间等数据进行相应处理，得出汽车轮胎放气规律。 关键词：轮胎 胎压 载荷 放气装置 放气规律 I ABSTRACT In recent years, with the improvement of peoples living standard, it the phenomenon is more and more common that automobile transport is beginning to enter the families as a way instead of walk.However, due to various reasons the traffic accident rate is rising year by year, and the traffic accident caused by the collision is in the largest percentage in all the the traffic accident styles. For this kind of situation, there are two kinds of safety measures, namely the TPMS system and ABS system.TPMS is based on the real-time inspection of monitor tire pressure and temperature to prevent blowout. However,ABS is to prevent wheel lock when vehicle is in the status of emergency braking, and ensure the safety brake.At this time,our task puts forward a new method on the basis of these two methods,and it is a new kind of the security measures based on new theory. Obviously ,the new measures will be to ensure peoples life and property safety in the future.The idea of this method is: when the car is about to collide, let the tyres down for a certain amount of gas,which reduces the tire pressure, but increase the friction between the tires and the ground, at last shorten braking distance, thereby reduce or even avoid collisions.So this task research is au