mazda 2.2d 召回疑似無效!? - 汽車
By Linda
at 2018-12-24T20:40
at 2018-12-24T20:40
Table of Contents
會有水箱水溢出的問題
最大的可能
水箱失壓導致冷卻水氣化
但是水箱水沒辦法回到足夠提高沸點的壓力
就會從沒有壓力蓋的地方噴出
沒有壓力蓋的地方就是副水箱
水箱沒有破的狀態下會造成壓力降低的原因
不外乎就是汽缸蓋墊片沖掉
或者引擎本身的材質不耐高溫
汽缸體與汽缸蓋夾層間 變形無法恢復導致
唯一解法 換引擎 引擎已經有不可逆的形變損傷了
然後變速箱電腦依舊要改就是
小車柴油的電腦邏輯
利用大扭力的特性用高檔位低轉速去省油
但是這種駕駛方式在其他大量使用柴油引擎的商用車界
是會被老師傅巴頭的壞習慣 尤其在爬坡
所以噴水事件第一件事就是公布修正變速箱電腦
其實這步是正確的 沒必要苛責廠商
原因就是要避免低轉速高檔位的重負荷
轉速低高負荷 容易爆震 爆震會釋放大量熱能
也因為低轉速 進排氣流速慢
缸內溫度無法利用廢氣快速排出
熱能就一直累積在汽缸內
這個部分是水冷系統很難有效散熱的
引擎散熱水箱只是避免本體變形(俗稱縮缸)
燃燒室的溫度控制還是靠進排氣
--
最大的可能
水箱失壓導致冷卻水氣化
但是水箱水沒辦法回到足夠提高沸點的壓力
就會從沒有壓力蓋的地方噴出
沒有壓力蓋的地方就是副水箱
水箱沒有破的狀態下會造成壓力降低的原因
不外乎就是汽缸蓋墊片沖掉
或者引擎本身的材質不耐高溫
汽缸體與汽缸蓋夾層間 變形無法恢復導致
唯一解法 換引擎 引擎已經有不可逆的形變損傷了
然後變速箱電腦依舊要改就是
小車柴油的電腦邏輯
利用大扭力的特性用高檔位低轉速去省油
但是這種駕駛方式在其他大量使用柴油引擎的商用車界
是會被老師傅巴頭的壞習慣 尤其在爬坡
所以噴水事件第一件事就是公布修正變速箱電腦
其實這步是正確的 沒必要苛責廠商
原因就是要避免低轉速高檔位的重負荷
轉速低高負荷 容易爆震 爆震會釋放大量熱能
也因為低轉速 進排氣流速慢
缸內溫度無法利用廢氣快速排出
熱能就一直累積在汽缸內
這個部分是水冷系統很難有效散熱的
引擎散熱水箱只是避免本體變形(俗稱縮缸)
燃燒室的溫度控制還是靠進排氣
--
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