概念汽车实用英语毛矛概念汽车实用英语U15章节.pptVIP

* * HEADLAMP Comparative studies have repeatedly shown that there is little or no overall safety benefit to either SAE or ECE beams; the two systems acceptance and rejection by various countries is based primarily on inertial and philosophical grounds. * HEADLAMP Headlamps on new vehicles must produce white light, according to both ECE and SAE standards. Previous ECE regulations also permitted selective yellow light, which from 1936 until 1993 was required on all vehicles registered in France. Yellow headlamps are no longer required anywhere, but remain permitted in France, Belgium, The Netherlands, Switzerland, Japan, New Zealand, and some other countries. * HEADLAMP Headlamps must be kept in proper alignment (or aim). Regulations for aim vary from country to country and from beam specification to beam specification. US SAE headlamps are aimed without regard to headlamp mounting height. * HEADLAMP This gives vehicles with high-mounted headlamps a seeing distance advantage, at the cost of increased glare to drivers in lower vehicles. ECE headlamps aim angle is linked to headlamp mounting height. This gives all vehicles roughly equal seeing distance and all drivers roughly equal glare. * NOTES TO THE TEXT 1. While it is common for the term headlight to be used interchangeably in informal discussion, headlamp is the technically correct term for the device itself, while headlight properly refers to the beam of light produced and distributed by the device. 译文：尽管术语headlight（前照光）在非正式讨论中可交换地使用，headlamp（前照灯）才是技术上指示装置本身的正确术语，而headlight（前照光）准确而言指的是该装置产生和分配的光束。 * NOTES TO THE TEXT 2. High beams cast most of their light straight ahead, maximizing seeing distance, but producing too much glare for safe use when other vehicles are present on the road. 译文：远光将它大部分光线投向正前方，最大化可见距离，但当路上有其他汽车时产生的过多眩光超出安全使用范围。 * NOTES TO THE TEXT 3. High beam headlamps provide a bright, centre-weighted distribution of light with no particular control of light directed towards other road users eyes. 译文