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首页> 外文会议>EAEC European automotive congress >PROPOSAL OF A TEST TO MEASURE VEHICLE NOISE EMISSIONS IN REAL DRIVING CONDITIONS
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PROPOSAL OF A TEST TO MEASURE VEHICLE NOISE EMISSIONS IN REAL DRIVING CONDITIONS

机译：测试在实际驾驶条件下测量车辆噪声排放的测试

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Traffic noise is one of the main sources of noise pollution in cities. Around an 80% of the city noise is produced by vehicles. One of the current technological challenges is to achieve a sustainable acoustic environment in constantly growing cities with a rising quantity of vehicles. Current legislation obliges to determine the noise level of a vehicle according to a test procedure shown in Directive 70/157/EEC. The maximum noise level has been declining gradually; however, this reduction has not affected the overall traffic noise. One of the reasons for this fact is that the approval test does not represent properly the real noise level emitted by a real car in real driving conditions. To determine the noise emission level more realistically, it is necessary to establish a pattern test that allows two things: controlling the main parameters that may affect such noise emission and reproducing the measurement conditions any time the test is performed. In this work, a sample of vehicles has been instrumented to obtain physical measurements of the variables that can influence the noise emission level. Positions, velocities, accelerations (longitudinal and lateral) and time have been analyzed using a GPS sensor. Engine speed, engine load, throttle position and engine temperature have been studied through the vehicle CAN BUS and a battery of microphones has measured emitted noise in several points of the vehicle. A circuit that represents the usual circulation in a big city like Madrid has been defined, as well as several vehicle models with great presence in existing fleet of cars. Several drivers have covered the circuit at different times of the day and previous parameters have been measured in each test in order to determine average values of behavior. With these average values, it has been possible to define a pattern test that allows to estimate the noise emissions produced by a vehicle in real driving conditions. This pattern test will also allow to establish acceptable limits of such emissions.
机译：交通噪声是城市中噪音污染的主要源之一。大约80％的城市噪音由车辆产生。目前的技术挑战之一是在不断增长的城市中实现可持续的声学环境，车辆数量上升。目前的立法允许根据指令70/157 / EEC中所示的测试程序确定车辆的噪声水平。最大噪音水平逐渐下降;但是，这种减少尚未影响整体交通噪音。这一事实的原因之一是，批准测试不正确地代表真正的驾驶条件中的真实噪音水平。为了更现实地确定噪声发射水平，有必要建立允许两件事的模式测试：控制可能影响此类噪声发射并在执行测试时再现测量条件的主要参数。在这项工作中，已经探测了车辆样本以获得可以影响噪声排放水平的变量的物理测量。使用GPS传感器分析了位置，速度，加速度（纵向和横向）和时间。通过车辆可以通过车辆总线研究发动机速度，发动机负荷，节流位位置和发动机温度，并且麦克风的电池已经测量了车辆的几个点的发射噪声。一系列代表马德里等大城市通常循环的电路已经定义，以及在现有汽车队列中具有很大的车​​型。几个司机在一天中的不同时间覆盖了电路，并在每个测试中测量了先前的参数，以确定行为的平均值。利用这些平均值，已经可以定义模式测试，该模式测试允许在实际驾驶条件下估计车辆产生的噪声排放。该模式测试还将允许建立这种排放的可接受限制。

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