為什麼四門轎車都不做後面雨刷 - 轎車

Ursula avatar
By Ursula
at 2018-01-08T02:30

Table of Contents

這之前好像討論過了? 不過趁機再寫詳細點

以車商的立場

雨刷是能不裝就不裝,不裝可以省成本、省重量、省開關控制器線路馬達、提高妥善率

所以裝雨刷是被迫的

要問的問題是為什麼5門大多數都被迫要做後雨刷?是要解決什麼問題?


直接的問題是5門車款的後擋風玻璃太容易被泥水噴髒

必須裝雨刷來解決

後擋風玻璃不是說下雨就會髒,這牽涉到泥土沉積的機制

可以看以下影片模擬車輛的泥水沉積:
https://www.youtube.com/watch?v=o1Dg8juCYfo

車輛行進時,由於壓差會產生尾流區(wake region, 若有更好譯法請告知)

尾流區的空氣會被捲起迴流,表面流速慢,泥水會在這個區域內沉積

尾流區不只發生在車尾,還會發生在輪子和後照鏡後方

尾流不只會捲空氣,還會包含雨水、泥水、雪水、塵土等等

基本上有什麼捲什麼

如果只有捲到雨水,那就不太會髒,例如後照鏡的尾流區沒什麼髒汙問題

但如果捲到塵土、雪水或泥水就會很髒,例如輪子的尾流區就會充滿髒汙

前輪尾流區造成輪拱和前後車門髒汙

後輪尾流區造成後葉子板和車輛後部髒汙


現在來講4門和5門的區別(可以配下圖)
http://www.exa.com/en/industry/automotive

5門車因為造型因素,整個車子後方是一個大的尾流區
http://www.exa.com/sites/default/files/media-module/e39touring.gif

他勢必會跟後輪的尾流區合流

後輪捲起的泥水塵土很容易被捲上後檔玻璃造成髒汙

逼不得已只好裝雨刷來清潔


四門車因為造型關係,有可能後擋和後車廂有兩個分開的尾流區
http://www.exa.com/sites/default/files/media-module/e39limousine.gif

後輪尾流區只和後車廂尾流區合流,沒有流到後檔玻璃的尾流區

髒只髒到後車廂,後檔玻璃就沒有泥土問題

如果造型設計得更流線,也有可能後檔完全沒有尾流區,尾流區只產生在後車廂後方

這樣更沒問題,在尾流區以外的車窗受到的風速很大,雨水會直接被吹走


大概是這樣,不過5門4門只是個分類,

空氣動力上沒有說5門一定怎樣怎樣4門一定怎樣怎樣,也有4門尾流很大的

總之,是車商依據測試出來的結果決定能不能不裝雨刷

※ 引述《dog9527 (致命病毒)》之銘言:
: 如題
: 我覺得後面雨刷很方便
: 而且四門做的話也沒衝突
: 每次下雨上面有雨水真的很影響視野
: 晚上加雨天真的視線不佳
: 為什麼四門都不做後雨刷呀?

--
Tags: 轎車

All Comments

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By Belly
at 2018-01-11T06:05
專業推
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原來如此
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漲姿勢了
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長知識了!只能推專業
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at 2018-03-19T04:38
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at 2018-03-22T09:27
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By Hamiltion
at 2018-03-26T08:11
推...一早起來看到圖,以為車屁股在噴血...
Rosalind avatar
By Rosalind
at 2018-03-30T08:00
所以裝擋泥板可以避免這樣的問題嗎QQ?
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By George
at 2018-04-02T00:41
長知識了
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By Dora
at 2018-04-03T19:59
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at 2018-04-04T15:04
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By Ula
at 2018-04-05T20:05
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By Blanche
at 2018-04-06T11:15
請問為什麼wrx日規有後雨刷 其他版本都沒有?
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By Emma
at 2018-04-09T12:16
專業推
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By Valerie
at 2018-04-13T22:14
知識佳!
Jessica avatar
By Jessica
at 2018-04-15T09:58
原來是這樣,我還困惑為何ioniq後擋沒雨刷但P4會有。原
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By Sierra Rose
at 2018-04-16T13:33
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By Kelly
at 2018-04-18T18:29
Quintina avatar
By Quintina
at 2018-04-20T20:35
怪不五門掀背價錢一般都比同款四門房車貴
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By Carol
at 2018-04-22T07:23
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By Iris
at 2018-04-26T06:54
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By Lucy
at 2018-04-29T10:41
以前的Evo好像也有 貼心的為玩泥巴的車主準備?
David avatar
By David
at 2018-05-01T15:18
5門掀背比四門貴的原因是設計成本攤提的關係,四門的
Odelette avatar
By Odelette
at 2018-05-03T00:36
銷售量會比掀背的銷售量大,所以成本攤提下售價可以較
便宜。
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By Agnes
at 2018-05-05T15:37
長知識
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at 2018-05-08T07:28
專業給推~
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長知識
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By Tristan Cohan
at 2018-05-12T12:20
謝謝分享
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By Olive
at 2018-05-13T04:10
推 但台灣的雨水可不怎麼乾淨
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at 2018-05-20T12:38
汽車系
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at 2018-05-24T17:47
這篇留著  半年後還可以再po一次
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推 清楚明瞭
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at 2018-05-26T16:38
推,這篇可以M
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恩恩,我也是這麼想的,但被你先發了
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長知識的!
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真的長知識!大推
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正確推 就是真空區的關係
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at 2018-06-27T17:38
專業 模擬風洞
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at 2018-06-30T21:11
你能不能到漢翔 設計新戰機
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at 2018-07-01T00:50
我兒子也常我這個問題,好專業的解答!
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By Candice
at 2018-07-04T07:47
推 所以有精細空力設計的跑車
尾部有些會拉長降低真空帶迴流
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By Thomas
at 2018-07-05T16:06
https://youtu.be/wWNjRYOHZts
有誤請指正
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影片大概在2:10
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專業好文,謝謝分享
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圖片說明給推
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By Hamiltion
at 2018-08-03T08:53
車版難得的優秀好文
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at 2018-08-03T13:20
大推
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By Elma
at 2018-08-14T16:25
Belly avatar
By Belly
at 2018-08-16T00:25
補充 日規四門車 尤其四驅版本 後擋雨刷是用來刷雪的
Dora avatar
By Dora
at 2018-08-19T11:12
難怪每次下雨四門車都只髒屁股,長知識了XD
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By Charlotte
at 2018-08-20T15:10
長知識
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By Hedda
at 2018-08-25T00:07
所以我不懂為什麼有的五門fastback 也這樣設計...
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at 2018-08-25T06:46
給推
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By Kumar
at 2018-08-27T01:06
原來如此,長久以來的疑問
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at 2018-08-30T12:50
封你為雨刷王
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at 2018-09-02T06:42
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at 2018-09-07T02:41
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at 2018-09-15T14:37
長知識堆
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By Necoo
at 2018-09-20T07:10
專業 沒錯唷 就是這個原因
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at 2018-09-22T05:47
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By Rebecca
at 2018-09-25T06:21
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at 2018-09-29T14:43
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at 2018-09-30T11:30
推 好文
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at 2018-10-02T15:14
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By Connor
at 2018-10-06T13:02
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By Blanche
at 2018-10-10T17:54
真是雨刷系
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By Adele
at 2018-10-14T19:53
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By Agnes
at 2018-10-15T06:29
專業
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By Una
at 2018-10-17T22:01
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By Jake
at 2018-10-18T06:01
推,ㄊ
感謝分享
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By Faithe
at 2018-10-22T06:27
長知識
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By Adele
at 2018-10-25T18:16
推~
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By Caroline
at 2018-10-28T01:41
你不要這麼專業好不好
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By Hedy
at 2018-10-28T03:13
矮油 不簡單 居然是BMW E39 & E39 Touring
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By John
at 2018-10-28T22:03
專業推~還有模擬影片!
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By Kelly
at 2018-10-31T17:24
專業推
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By Leila
at 2018-11-04T11:03
專業
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at 2018-11-05T06:23
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By Quintina
at 2018-11-08T09:07
專業
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By Eartha
at 2018-11-12T05:07
專業推
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By Agatha
at 2018-11-13T03:14
雨刷王 好
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By Charlie
at 2018-11-14T10:41
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By Emily
at 2018-11-17T06:25
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By Poppy
at 2018-11-18T22:46
專業
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By Yuri
at 2018-11-20T03:47
推一個
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By Ula
at 2018-11-22T14:03
尾流系推
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By Thomas
at 2018-11-24T20:10
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By Isabella
at 2018-11-29T03:49
推專業
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By Jessica
at 2018-11-30T14:39
就是尾流區沒錯,騎檔車容易噴也是一樣的道理
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By Valerie
at 2018-12-02T17:26
Ophelia avatar
By Ophelia
at 2018-12-04T07:11
紅明顯,那可以請教一下為什麼 EVO 的後擋要裝雨刷嗎?
http://i.imgur.com/dIoSFml.jpg
Robert avatar
By Robert
at 2018-12-08T09:38
紊流
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By Ethan
at 2018-12-10T15:46
解惑了
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By Franklin
at 2018-12-14T06:50
專業!
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By Belly
at 2018-12-15T14:40
感謝解惑
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By Candice
at 2018-12-19T11:31
EVO WRX是要去玩沙地才裝 純競技用
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By Thomas
at 2018-12-20T15:43
車版少見的優質文章
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By Puput
at 2018-12-21T22:40
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By Yedda
at 2018-12-24T11:42
很專業 不過有的五門車也不一定有,就看過好幾台livina 沒有
Jacob avatar
By Jacob
at 2018-12-29T02:01
日本國內北海道式樣四門也會有後雨刷
Caroline avatar
By Caroline
at 2019-01-02T11:22
漲姿勢惹
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By Olga
at 2019-01-04T09:53
刷雪專用
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By Michael
at 2019-01-06T09:28
專業,不推說不過去
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By Mary
at 2019-01-10T08:43
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By Linda
at 2019-01-14T21:15
長知識推
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By Andy
at 2019-01-16T00:02
U質推
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By Ivy
at 2019-01-19T08:00
推,流力問題
Elvira avatar
By Elvira
at 2019-01-23T21:33
Hazel avatar
By Hazel
at 2019-01-24T06:25
日規版有後雨刷是因爲下雪,還有北海道版的喜美(AWD
Bennie avatar
By Bennie
at 2019-01-27T10:24
Emma avatar
By Emma
at 2019-01-28T23:03
不管懂不懂 反正只能給推了
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By Noah
at 2019-02-02T16:41
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By Anthony
at 2019-02-06T15:03
專業推推
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By Joseph
at 2019-02-09T17:08
長知識了
Heather avatar
By Heather
at 2019-02-10T19:03
推推
Elma avatar
By Elma
at 2019-02-10T23:32
裝大尾翼也需要雨刷啊~
Ina avatar
By Ina
at 2019-02-12T20:51
推 長知識
Gilbert avatar
By Gilbert
at 2019-02-16T12:20
想知道擋泥板有沒有用,每次下雨車側超髒
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By Ivy
at 2019-02-17T08:58
好猛推 長知識了
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By Dorothy
at 2019-02-20T15:47
長知識
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By David
at 2019-02-22T01:45
推專業+1
Hedy avatar
By Hedy
at 2019-02-24T12:39
補推,忘了還有下雪國家
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By Joseph
at 2019-02-26T13:08
推一個
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By Dinah
at 2019-03-01T15:54
專業
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By Lucy
at 2019-03-04T07:40
專業推
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By Tracy
at 2019-03-08T11:44
原來是這樣 感覺啾啾鞋可以出一部片了
Edith avatar
By Edith
at 2019-03-11T14:12
專業!!
Rosalind avatar
By Rosalind
at 2019-03-14T20:44
推 長知識
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By Zora
at 2019-03-17T06:55
長知識推
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By Doris
at 2019-03-21T01:34
真專業
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By Todd Johnson
at 2019-03-21T12:18
推推
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By Madame
at 2019-03-24T23:25
推專業
Olivia avatar
By Olivia
at 2019-03-26T06:01
車板 清流推!
Agatha avatar
By Agatha
at 2019-03-27T02:39
但很多轎車 和一般轎車無異 但後玻璃可一起掀起
後擋也做雨刷耶
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By Wallis
at 2019-03-30T12:22
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By Sarah
at 2019-03-31T20:45
專業
Ingrid avatar
By Ingrid
at 2019-04-04T12:42
這就是專業!
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By Agatha
at 2019-04-07T07:31
要收精華區
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By Selena
at 2019-04-10T18:17
Liam avatar
By Liam
at 2019-04-13T15:28
推專業
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By Barb Cronin
at 2019-04-15T14:19
原來如此 長知識
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By Eartha
at 2019-04-19T23:44
趕緊跟上推一下,不然要被笑紋組了 囧
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By Charlie
at 2019-04-24T14:28
Wallis avatar
By Wallis
at 2019-04-27T11:25
推專業!
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By Blanche
at 2019-04-30T23:52
今年最專業
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By Hedda
at 2019-05-02T08:08
專業推
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By Necoo
at 2019-05-04T18:45
記得之前老蕭有解釋過
Necoo avatar
By Necoo
at 2019-05-05T21:17
太強了
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By James
at 2019-05-09T21:57
好厲害
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By Liam
at 2019-05-11T02:51
長知識推
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By Adele
at 2019-05-14T04:31
推這篇
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By Brianna
at 2019-05-16T12:00
專業推
Quintina avatar
By Quintina
at 2019-05-20T14:20
這不是常識而已嗎? 車板之前已經討論過好幾次這個問題了
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By Kelly
at 2019-05-21T05:43
專業!
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By Candice
at 2019-05-25T17:15
推!
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By Poppy
at 2019-05-27T11:25
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By Candice
at 2019-05-29T14:09
推專業
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By Hazel
at 2019-06-03T03:14
機械系流體力學第一課XD
Daniel avatar
By Daniel
at 2019-06-04T22:26
一直以為是因為五門後檔比較垂直不容易被水沖掉所以
需要雨刷輔助xD
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By Edward Lewis
at 2019-06-07T10:23
四門轎車裝後雨刷是要除雪的
Gary avatar
By Gary
at 2019-06-12T03:11
Jacob avatar
By Jacob
at 2019-06-14T09:56
Zanna avatar
By Zanna
at 2019-06-16T17:37
Olive avatar
By Olive
at 2019-06-16T19:30
Eartha avatar
By Eartha
at 2019-06-19T19:41
專業 推
Ophelia avatar
By Ophelia
at 2019-06-20T19:19
Mary avatar
By Mary
at 2019-06-21T11:43
超越專業的專業文章,感謝w

為什麼四門轎車都不做後面雨刷

Oscar avatar
By Oscar
at 2018-01-08T00:11
如題 我覺得後面雨刷很方便 而且四門做的話也沒衝突 每次下雨上面有雨水真的很影響視野 晚上加雨天真的視線不佳 為什麼四門都不做後雨刷呀? - ...

sienta嗎?70萬的選擇

John avatar
By John
at 2018-01-05T21:32
Sienta 之所以賣得好就在於它的定價在國內5+2偽七人座當中最低 但你沒有要七人座的話其實不太建議買這台 原因 1. 這台真的很鋁罐 有在發漏汽車道路撞擊FB就知道 2. 價格70萬來說動力過小 3. 你標題讓人覺得你並不喜歡這台車 至於U5就更不推了 1. 耗油 2. 妥善率 3. 動力變速箱 ...

國產車大降價 破格搶客

Lucy avatar
By Lucy
at 2018-01-05T20:57
※ [本文轉錄自 cjol 信箱] 作者: cjol (勤樸) 看板: Stock 標題: [新聞] 國產車大降價 破格搶客 時間: Fri Jan 5 19:07:32 2018 1.原文連結: http://www.chinatimes.com/newspapers/2018010300031 ...

開國道通勤的車輛配備

Rosalind avatar
By Rosalind
at 2018-01-05T10:44
各位前輩好,小弟預計九月開始要每天開車通勤來回共120km上課,目前代步車是Galant ,但安全配備較不足,所以準備購入新車,想請問一下有哪些配備比較能夠減輕開車的疲 勞感且增加安全度呢? 補一下預算,最多就150萬不能捏了,但還是希望能少花就少花,不排斥二手車,但非新 車的話預算就想拉低一點,不過我很怕 ...

強!暴衝直接翻過一輛車 「飛行汽車」

Quanna avatar
By Quanna
at 2018-01-04T20:05
強!暴衝直接翻過一輛車 「飛行汽車」讓人驚 https://www.youtube.com/watch?v=iGzTfeaaehY 見證性能!美國網友布瑞貝克(Robb Brilbeck)上月到伊利諾州羅克福德一間銀行辦事 等待離去時,竟然遇到了「飛行汽車」,前方車輛在離開時不知為何暴衝,竟然直接跨越 一 ...