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?汽車圈里的10大謠言??真相其實是這樣的..

更新時間:2025-09-07 00:27:29發布時間:2022-03-03 12:19:23

汽車是由成千上萬個部件組成的,因此在用車、養車、修車,甚至新車方面都會存在一些模棱兩可信息混淆新老車主。這些信息要么完全錯誤,要么就是不夠嚴謹太片面,這也是很多車主問到的問題。在此,小編為大家解讀汽車圈里的十大謠言。你有什么汽車問題,歡迎找我們答疑解惑

1.加燃油寶更省油


每當我們去加油站加油時,加油站的服務人員都會向我們推薦各種品牌的燃油寶(燃油添加劑),并介紹說加上燃油寶如何省油,效果如何如何好?事實上燃油寶確實有改善汽油燃燒、清除積碳、改善排放等功效。燃油寶對于直噴發動機作用比較大尤其是進口直噴發動機,對于直噴發動機來說,汽油的標號要求比較高,甚至加95號的汽油還會產生積碳,這時添加燃油寶是一個不錯的選擇,可以減少由于發動機燃燒不好產生積碳的問題。

但是要注意想要減少積碳這種長年累積的東西,就得常年累月的使用燃油寶,促使成本變高。燃油寶既然改善了汽油燃燒就不會使汽車省油,所以燃油寶省油是錯誤的。另外,汽車燃油寶的選擇非常重要,一定要選擇有質量保證的品牌(廠家生產的較好)。如果使用劣質的燃油寶,不僅缸內燃燒得不到改善反而適得其反,嚴重時還會毀壞三元催化器等問題。

2.汽車空調溫度越低油耗越高


夏天最難受的事情莫過于汽車空調不給力,空調越冷油耗越高的說法也發也就被大眾認可,那事實是這樣嗎?汽車空調壓縮機分為定量空調泵和變量空調泵。定量空調泵簡單的理解就是汽車空調泵的排量(功率)是額定的,只要開啟空調制冷空調壓縮機就會以額定功率的運轉,目前家用轎車多采用定量泵。車內AC開關實際就是控制壓縮機是否工作的一個開關,當然在壓縮機工作時溫控器同樣也會控制壓縮機的開閉,其實調節溫度時只是改變了溫控開關的位置,自動空調理論是一樣的。

而用變量空調泵簡單的說就是按照需要在工作需要慢慢的增加(減少)壓縮比(變量),以減少壓縮機的周期性離合對汽車發動機引起的干擾(消耗發動機功率)同時減少噪音,變量空調泵會根據溫度控制空調泵的排量能達到減少油耗的目的。所以采用固定排量空調泵的汽車,不論手動空調還是自動空調要調節制冷量大小(溫度高低),其實只是調節風門(溫控開關)大小并沒有多大的科技含量,你只要開空調油耗幾乎就是額定的跟溫度高低、風量大小無關(至于為什么加大風量怠速升高,你可以問問發電機)。

3.機油標號越高越好越貴越好


關于發動機機油,大部分車主都認為機油的標號(指機油等級和質量等級,如全合成機油、半合成機油)越高越貴對發動機越好,發動機機油的作用和標號含義不再多做介紹,發動機機油的選用主要是根據汽車使用中的周圍環境溫度(機油低溫流動性)、發動機工作溫度(高溫流動性、機油抗氧化性)、工作強度(高溫附著性、機油抗剪切抗磨性)、設計裝配參數等等來決定,在選擇機油標號類型時要通過一系列的試驗進行驗證,最后得到發動機適用的機油標號。所以原發動機機油的類型標號是經過試驗的,沒有必要去一味的追求高標號機油。

雖然說機油標號越高性能越好(機油標號表示機油的低溫流動性、高溫抗磨性等,質量等級表示機油是全合成、半合成型機油),但是對于普通發動機或比較老的車,用標號高的機油并不一定是一件好事,老車的發動機由于磨損間隙較大(而部分低檔車則是制造過程中的缸體間隙本身就比較大),所以用全合成機油有可能會造成竄機油,從而發生燒機油、積碳過多等現象,所以在選擇機油時只選擇合適的,完全沒必要選擇高標號機油稱門面。

4.三廂車比兩廂車更安全


在國人眼中看慣、用慣了三廂車,廠商冷不丁的推出兩廂車后,二廂車備受懷疑,第一就是懷疑兩廂車的安全性能。眾所周知兩廂車比三廂車少了一段“車屁股”,就被認為少了吸能緩沖的保命區域,事實上是這樣嗎?首先國內的碰撞試驗來看并沒有針對汽車的尾部進行試驗,另外汽車行車安全主要是大家良好的駕駛習慣。其次,兩車相撞時相對速度決定了汽車的損壞程度,這時能挽救汽車的并不是鐵皮有多厚,有沒有保險杠,而是汽車的受力情況、車架的承受能力剛度及受力的傳遞路線是否合理等。

在設計時廠商也會考慮到兩廂車的后部情況,一般會加強后部的承受撞擊時的能力。目前所有兩廂車的后部,都有一定的碰撞變形區域設計,足以吸收碰撞產生的沖擊能量。當然二廂車的安全與否主要還是看汽車的廠商、汽車的開發平臺、材料應用等。所以兩廂車和三廂車并不存在哪個形式更安全的問題,這種問題只存在于開發平臺與品牌的不同,說白了就是制造工藝、制造材料、品牌技術方面的差異等。

5.汽車沒有天窗比有天窗更安全


汽車天窗作為高端配置應用在“高配”汽車上,但大部分人會認為汽車沒有天窗會比有天窗更安全。汽車多采用承載式車身,汽車的安全性主要是看承載車身的梁柱與車身的厚度關系不大。為了實現全景天窗的配置車頂上的橫梁就要做出犧牲——減少橫梁,橫梁既然減少了那安全系數就要減少,這是普遍的想法。事實上汽車配有天窗的車身并不因為少根橫梁車身的強度、剛度就會下降。.車窗位置都采用特殊的材料以及重新設計的受力承載路線,并不會給車身整體帶來負面影響,反而讓車頂變得更堅固。

二是在加天窗后,汽車還要多做一系列的安全試驗,包括長期使用車頂的振動疲勞試驗、翻滾及車頂抗壓實驗、車內噪聲、車身溫度及碰撞過程中對乘員保護系統的影響等。除了這些橫梁之外,無論是金屬車頂,還是全景天窗的車頂都不過是一層車皮而已,對整體的被動安全性影響不大。汽車發生事故時,天窗玻璃會破碎小塊最大限度的保護車內人員,這時便有多了一個逃生出口。綜合上述,汽車帶天窗是安全的。

6.防爆胎真的防暴嗎


汽車輪胎最怕什么?當然是扎釘或爆胎,扎釘這種情況幾乎每個車主都碰到過,而普通輪胎碰到這種情況只能等救援或自己動手換備胎,而一些廠家推崇的防爆胎卻不會有這種情況,那防爆胎真如名字一樣防爆嗎?防爆胎學名叫“泄氣保用輪胎”,英文縮寫RSC。從學名的字面意思就能看出它的作用,在輪胎扎釘漏氣時還能繼續行駛(以80km/h行駛至少50—80公里)。至于防爆的功能汽車廠家有夸大的嫌疑,防爆胎并不是不會爆胎。

防爆胎可以簡單理解為加強了輪胎胎壁的厚度,在泄氣時能夠支撐起汽車的重量并能以相當的速度行駛。所以防爆胎還是會爆胎的,普通輪胎在爆胎的一瞬間就會失去對汽車的操控,如果車速超過160km/h的話死亡率達到100%(注:爆胎的一瞬間謹慎使用剎車)。在發生爆胎的一瞬間和普通輪胎沒區別,由于爆胎瞬間所有負重都會集中在爆胎側汽車會短暫失控,只要抓緊方向盤松油門,防爆胎就會以非常有韌性和支撐性的胎壁給汽車一些支撐,使汽車能夠恢復控制,所以防爆胎也是會爆胎的只是在爆胎時汽車更容易得到控制,對于輪胎這已經足夠了。

7.車皮越厚越安全


對于汽車安全大家的要求都一樣——汽車越安全越好,那車皮越厚越安全嗎?這,卻往往忽略功率的問題。

帶T的發動機功率往往比自然吸氣的功率高,舉個例子1.8T的發動機的功率大概相當于2.2L自然吸氣發動機,在同樣負載的情況下1.8T發動機顯然要比2.2L自然吸氣發動機要省油,況且渦輪增壓發動機日趨成熟,渦輪介入的轉速越來越低,介入延遲越來越小,燒機油現象越來越不明顯,使用壽命越來越長,所以隨著汽車技術升級渦輪增壓發動機會越來越省油而不是費油。

9.停車要先掛N擋再掛P擋


關于這個流言由來已久,說汽車在停車時要先掛到N擋停留片刻再掛P擋不然容易損壞變速器,這是真的嗎?P擋即駐車擋是車輛停車時,停車鎖止機構將變速器輸出軸鎖止,防止車輛溜車。從字面的意思理解P擋就是專門為駐車設計,而N擋不是。按照流言的說法,如果汽車經常停在斜坡上,變速器p擋的制動機構一直在承受整車的質量豈不是對于變速器的沖擊更大,更容易損壞變速箱。

其實平時停車可能會有輕微的晃動,那是因為p擋的駐車棘爪和卡槽之間、其它傳動部件之間有間隙。(車輛停穩時掛p擋無此現象)目前汽車控制程序非常出色,部分汽車在減速停車時,汽車的控制單元就開始按程序進行運算,在車主做出停車或繼續行駛時變速器立馬響應。其中雙離合器的變速器表現尤為突出,大大減少了換擋沖擊和換擋時間,所以沒有完全必要去先掛N擋,再掛P擋,P擋是專為停車設計的檔位。

10.空檔滑行毀車


空檔滑行主要針對的是自動檔汽車,因為很多老司機在開手動檔汽車時習慣去空檔滑行,所以才有可這么一個話題。對于目前的自動變速器來說并不存在空擋滑行毀變速器一說,因為在掛空擋(N擋)時變速箱內的傳動部件在空轉,即太陽輪,行星架,齒圈沒有被相關部件固定。當從D擋掛入N擋后,發動機的動力依然通過液力變矩器傳到變速器,也就是說變速器的油泵一直在工作。

事實是空擋時輸入軸帶著太陽輪一起運轉,同時帶動行星輪旋轉,行星輪又帶動齒圈旋轉,但是由于處于空擋齒圈和行星架都未被固定,所輸入的動力并未傳遞到輸出軸上,那么調速器就不會向變速器油泵發送轉速信號(不會中斷泵油),而油泵在于液力變矩器的后面,也就是說油泵是一直工作的,至少變速箱內會始終保持在一個基本的壓力。問題就是這個基本的壓力能不能滿足變速箱的潤滑和散熱了。既變速器油泵能泵油有壓力,所以并不向很多人說的那樣,在短距離內變速器會沒有潤滑而導致損壞。(部分自動檔高端汽車拖車距離限制50公里以內)

當然并不建議您在下坡時掛空擋滑行,并不是變速器損壞問題,而是人身安全的問題。因為下坡時掛空擋失去了發動機帶來制動的效果(有些車帶牽引力控制系統),速度會越來越快,如果這時出現突發情況,后果不堪設想。



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