汽车头灯两箱法起雾试验技术研究

Research on the Bi-climatic Chamber Atomization Test for Car Headlamp

车灯内部起雾会严重地影响汽车车灯的外观、照明质量和使用寿命。为了及时地发现早期车灯的热设计上的不足,避免车灯在实际的使用中出现起雾问题,往往需要进行起雾试验,以验证车灯的实际性能。因此,车灯起雾试验方法的设计正确与否,能否重现车灯实际使用时的状况,便成为了试验方法研制中的关健。在简单地介绍汽车头灯目前常用的单一环境条件下的起雾试验及其不足的基础上,详述了两箱法起雾试验的标准和设备,并以实例具体地对头灯两箱法起雾试验进行了说明,结果显示,头灯两箱起雾试验的结果与整车起雾试验的结果比较吻合,表明两箱法起雾试验能够更加准确、有效地发现头灯热设计中与起雾相关的缺陷。

Fogging in the inside of automotive lamp will seriously affect the appearance, illuminating quality and service life of automotive lamp. In order to timely discover the deficiency in the thermal design of automotive lamp in the early stage and avoid the fogging problem of automotive lamp in practical use, automization test is often carried out to verify the actual performance of automotive lamp. Therefore, whether the design of the atomization test method is correct and whether it can reproduce the situation of the lamp in actual use become the key to the test method. Based on the introduction of the commonly used atomization test of automotive headlight under a single environmental condition and its disadvantages, the standards and equipments of the bi-climatic chamber atomization test are introduced, and the bi-climatic chamber atomization test is described with an example in detail. The results show that the results obtained from bi-climatic chamber atomization test and the results obtained from vehicle atomization test can coincide with each other, and the hi-climatic chamber atomization test can more accurately and effectively discover the defects in the thermal design of headlight related to fogging.