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三分鐘搞懂引擎 問題
-柴油車篇
柴油「EGR」、「DPF」
「柴油車積碳在哪裡」、「為何要除碳」
但卻不理解…
是否常常聽到…
這份懶人包希望讓您知道…
DPF
EGR&
什
麼
是
?
被
動
再
生
主
動
再
生
&
什
麼
是
?
除
碳
需
要
為
什
麼
?
一. 二. 三. 四.
及
預
防
的
地
方
積
碳
。
什麼是
EGR&
DPF
EGR =
什麼是EGR&DPF
廢氣再循環系統(Exhaust Gas Recirculation, EGR)
即為目前控制NOx污染物的方式之一。它是針對引擎
排氣中有害氣體NOx所設置的排氣淨化裝置。為了避
免氮氧化合物(NOx)排放至空氣中,柴油引擎會將
廢氣經由EGR閥門回收到進氣歧管。
柴油車的呼吸系統
Exhaust
Gas
Recirculation
什麼是EGR&DPF
DPF =
柴油碳微粒濾清器(Diesel Particulate Filter, DPF)
是為了避免柴油未完全燃燒所產生的PM,也就是「懸
浮微粒」直接進入空氣中造成危害。由於懸浮微粒會
對人體呼吸器官具危害性,甚至有致癌的風險,因此
歐盟才會要求新世代柴油車款都要在排氣管中段上,
裝上DPF
柴油車的過濾裝置
什麼是EGR&DPF
Diesel Particulate Filter
什麼是EGR&DPF
Diesel Particulate Filter
什麼是EGR&DPF
什麼是
被動再生
主動再生
/
1. 氮氧化合物(NOx)與氧(O2 )反應成為:二氧化氮
(NO2 )
2. 二氧化氮(NO2 )與碳微粒中的碳(C)反應成為:一
氧化碳(CO)與一氧化氮(NO)
3. 一氧化碳(CO)+一氧化氮(NO)+氧(O2 )反應成為:
二氧化碳(CO2 )+-二氧化氮(NO2 )
1. 氮氧化合物(NOx)與氧(O2 )反應成為:二氧化氮
(NO2 )
2. 二氧化氮(NO2 )與碳微粒中的碳(C)反應成為:一
氧化碳(CO)與一氧化氮(NO)
3. 一氧化碳(CO)+一氧化氮(NO)+氧(O2 )反應成為:
什麼是被動再生/主動再生
被動再生
一般流通過的廢氣經類似觸媒轉換器轉化
有毒氣體的作用。可大幅減少排放到大氣
中的碳微粒,此排碳之過程稱為被動再生
1. 氮氧化合物(NOx)與氧(O2 )反應成為:二氧化氮
(NO2 )
2. 二氧化氮(NO2 )與碳微粒中的碳(C)反應成為:一
氧化碳(CO)與一氧化氮(NO)
3. 一氧化碳(CO)+一氧化氮(NO)+氧(O2 )反應成為:
二氧化碳(CO2 )+-二氧化氮(NO2 )
1. 氮氧化合物(NOx)與氧(O2 )反應成為:二氧化氮
(NO2 )
2. 二氧化氮(NO2 )與碳微粒中的碳(C)反應成為:一
氧化碳(CO)與一氧化氮(NO)
3. 一氧化碳(CO)+一氧化氮(NO)+氧(O2 )反應成為:
什麼是被動再生/主動再生
主動再生
當碳微粒累積在過濾層壁上到一定密度時,系統會啟
動主動再生。DPF將從正常攝氏300~500度升高到600
~650度,此時引擎會關閉「EGR廢氣循環回路」增加
燃燒室溫度進行清除。
車速高於60km/h
轉速高於2000rpm行駛15分鐘以上
1. 氮氧化合物(NOx)與氧(O2 )反應成為:二氧化氮
(NO2 )
2. 二氧化氮(NO2 )與碳微粒中的碳(C)反應成為:一
氧化碳(CO)與一氧化氮(NO)
3. 一氧化碳(CO)+一氧化氮(NO)+氧(O2 )反應成為:
二氧化碳(CO2 )+-二氧化氮(NO2 )
1. 氮氧化合物(NOx)與氧(O2 )反應成為:二氧化氮
(NO2 )
2. 二氧化氮(NO2 )與碳微粒中的碳(C)反應成為:一
氧化碳(CO)與一氧化氮(NO)
3. 一氧化碳(CO)+一氧化氮(NO)+氧(O2 )反應成為:
什麼是被動再生/主動再生
主動再生
被動再生
讓愛車
自行清潔
理想狀況
積碳原因多
與其被動的
等待,不如
保養時主動
清洗乾淨
實際狀況
為什麼
需要
除碳
柴油引擎擁有低轉速高扭力、低油耗、耐久性
佳的優勢,但為了使高污染性的引擎能排放出
乾淨的廢氣,週邊的過濾輔助系統比汽油引擎
來得多出許多,這些系統保養時也需清潔。
為什麼要除碳
DPF若阻塞將導致功能異常,引擎油耗增加,
動力不足,排溫過高,若無法再生淨化時,就
必須更換全新 DPF (售價約8-15萬)
車輛
易積碳的
位置
進氣歧管
節氣門
燃燒室
DPF
車輛易積碳的位置
EGR閥
節氣門
Before After
車輛易積碳的位置
進氣歧管
Before After
車輛易積碳的位置
車輛易積碳的位置
燃燒室
Before After
Before After
DPF
Before After
車輛易積碳的位置
車輛易積碳的位置
EGR閥
Before After
建議多久
進行一次除碳
建議多久進行一次除碳
建議在每一次愛車保養時
都能進行除碳,養成定期
清洗的保養習慣,除了能
提升車主駕駛的順暢度外
更能保護愛車的健康,增
加行車安全。
要如何
預防積碳
務必使用合乎
柴油引擎規範的機油
定時保養並確實
養成除碳好習慣
1. 2. 3.
車輛保養時
一定要站按照原廠規範
將燃油濾芯換新
不急踩油門,以輕柔
的方式加速,可避免
燃燒不完全形成
積碳的問題
要如何預防積碳
RUNMAX
頂級除碳
RUNMAX 頂級除碳

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【RUNMAX_三分鐘搞懂『引擎積碳問題』-柴油車篇】