改燈LED光源(煞車燈 方向燈) - 汽車
By Ingrid
at 2021-03-07T15:41
at 2021-03-07T15:41
Table of Contents
最近無聊下開始研究汽車的LED光源,
因為考慮法規與其他用路人的眼睛下,
大燈部分還是維持原來的鹵素燈泡。
本次改裝還是針對剎車燈與方向燈來更換LED燈,
改裝LED燈珠首先是要看看汽車電腦有沒有燈泡故障偵錯功能,
如果有恭喜你(歐系車大部分都有),
更換LED燈珠會麻煩些。
比如說剎車燈燈泡是21W的功率(單芯 雙芯都一樣),
那電腦會一陣子去偵測該燈泡阻值或是有沒有開路,
如果有電腦就會顯示故障訊息。
而換LED燈珠一部分是為了省電,另一部分是為了亮度。
那省電部分就會造成電腦偵測出現故障碼。
因為21W(鹵素燈)-6W(LED) =15W落差
對於這樣的問題,市面上有所謂的解碼器可以買來裝,
這種所謂的解碼器其實就是水泥電阻+散熱片,
並在電路上讓6W的LED燈珠省掉的電,
給水泥電阻去消耗掉(變成廢熱 實際上也就是沒省電)。
然後實際上產生21W左右的功耗,
電腦偵測也就不會出現故障碼。
不過解碼器這種東西老實說挺危險的,
因為25W 10歐水泥電阻可能溫度就會破百,
如果安裝位置不當可能會造成塑膠件或是電線熔毀,
更嚴重的會造成火燒車。
也就是這個原因我一度放棄更換LED剎車燈。
不過這種問題也不是沒辦法克服,
是不是把LED燈珠做到相同瓦數21W就可以了呢?
對,沒錯。
因為現在燈珠規格太多,大量小功耗燈珠+散熱片(或風扇),
加上電源控制IC,來產生恆壓+恆流的21W剎車燈,
市面上也買得到了。
目前我的Focus MK3 TDCi 5D,
安裝LED煞車燈(不亮故障碼 不微閃偷亮)
方向燈是(也不會亮故障碼與快閃)。
節能方面是沒有,但是亮度方面是提升很多。
沒有安裝所謂的水泥電阻解碼器,
安全性也提高不少。
以上給大家參考。
BTW
至於小功耗室內燈,我個人不建議更換,
因為鹵素燈泡的演色性還是比LED好太多,
尤其是藍光問題會讓你眼睛很不舒服。
市面上我還沒看到有主打高演性RA值>90的汽車用LED燈珠。
高演色性燈珠,
手電筒與房屋室內照明、攝影補光燈倒是不少。
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