后視鏡是駕駛員坐在駕駛室座位上直接獲取汽車后方、側方和下方等外部信息的工具。為了駕駛員操作方便,防止行車安全事故的發生,保障人身安全,各國均規定了汽車上必須安裝后視鏡,且所有后視鏡都必須能調整方向。
在夜間受到后車的前照燈照射時,后視鏡的反射光進入駕駛員的眼簾,易于造成炫目狀態,所以開發出防炫目內后視鏡。防炫目內后視鏡大致可以分為兩種:
(1)成本低且成為主流的截面為楔型的內后視鏡;
(2)從功能效用的觀點出發,僅在必要的景物時使用的采用了電控彩色發光元件或液晶元件的內后視鏡。
防(fang)眩目(mu)電(dian)(dian)(dian)(dian)(dian)動(dong)后(hou)(hou)視鏡由1個特(te)殊的(de)電(dian)(dian)(dian)(dian)(dian)化層(ceng)(ceng)鏡面(mian)、2個光(guang)電(dian)(dian)(dian)(dian)(dian)傳感器(qi)以及電(dian)(dian)(dian)(dian)(dian)子控制器(qi)組成。電(dian)(dian)(dian)(dian)(dian)子控制器(qi)接收(shou)光(guang)敏(min)二極(ji)管傳送(song)的(de)燈光(guang)照(zhao)射(she)強度(du)信號,如果后(hou)(hou)車(che)燈光(guang)強于前車(che)燈光(guang),電(dian)(dian)(dian)(dian)(dian)子控制器(qi)將(jiang)輸出一個電(dian)(dian)(dian)(dian)(dian)壓到鏡面(mian),改(gai)(gai)變(bian)鏡面(mian)電(dian)(dian)(dian)(dian)(dian)化層(ceng)(ceng)的(de)顏(yan)(yan)色。這個電(dian)(dian)(dian)(dian)(dian)壓越(yue)高,電(dian)(dian)(dian)(dian)(dian)化層(ceng)(ceng)顏(yan)(yan)色的(de)改(gai)(gai)變(bian)越(yue)大。電(dian)(dian)(dian)(dian)(dian)化層(ceng)(ceng)的(de)顏(yan)(yan)色改(gai)(gai)變(bian)后(hou)(hou),經過(guo)電(dian)(dian)(dian)(dian)(dian)動(dong)后(hou)(hou)視鏡反(fan)射(she)到駕駛員眼睛的(de)光(guang)線就(jiu)顯著減(jian)弱,不(bu)但不(bu)影(ying)響駕駛員的(de)視力,反(fan)而提高了駕乘(cheng)車(che)輛的(de)舒適性(xing)和安(an)全性(xing)。
雖然(ran)這(zhe)款(kuan)X1車型叫xDrive28i.寶馬(ma)X1現在(zai)已(yi)經成為(wei)最熱門的一款(kuan)緊湊型SUV、、X1量產版車型和概念版十分相似 寶馬(ma)X1驅動(dong)設定區分為(wei)四驅及后驅兩(liang)種,將提供包括177馬(ma)力(li)柴油發(fa)動(dong)機(ji),0~100km/h加速(su)8.4秒,平均油耗(hao)每公(gong)升17.8公(gong)里、204馬(ma)力(li)柴油發(fa)動(dong)機(ji),0~100km/h加速(su)8.4秒,以(yi)及頂級款(kuan)。
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