1、保證汽(qi)(qi)(qi)車(che)(che)(che)(che)平(ping)穩(wen)起(qi)(qi)步(bu) 這(zhe)是(shi)離(li)合(he)器(qi)(qi)的(de)(de)(de)首要功(gong)能。在(zai)汽(qi)(qi)(qi)車(che)(che)(che)(che)起(qi)(qi)步(bu)前(qian)(qian),自然(ran)要先起(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)。而(er)汽(qi)(qi)(qi)車(che)(che)(che)(che)起(qi)(qi)步(bu)時(shi)(shi),汽(qi)(qi)(qi)車(che)(che)(che)(che)是(shi)從完(wan)全靜(jing)止的(de)(de)(de)狀(zhuang)態逐(zhu)步(bu)加(jia)速的(de)(de)(de)。如果傳動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)系(xi)(它聯系(xi)著整(zheng)個汽(qi)(qi)(qi)車(che)(che)(che)(che))與發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)剛性(xing)地聯系(xi),則變速器(qi)(qi)一掛上(shang)檔(dang),汽(qi)(qi)(qi)車(che)(che)(che)(che)將(jiang)突然(ran)向前(qian)(qian)沖(chong)一下(xia),但(dan)并(bing)不(bu)能起(qi)(qi)步(bu)。這(zhe)是(shi)因為汽(qi)(qi)(qi)車(che)(che)(che)(che)從靜(jing)止到前(qian)(qian)沖(chong)時(shi)(shi),產生很大慣(guan)性(xing)力,對發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)造成很大地阻(zu)力矩(ju)(ju)。在(zai)這(zhe)慣(guan)性(xing)阻(zu)力矩(ju)(ju)作用下(xia),發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)在(zai)瞬時(shi)(shi)間(jian)轉(zhuan)速急劇下(xia)降(jiang)到最低穩(wen)定(ding)轉(zhuan)速(一般300-500RPM)以下(xia),發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)即熄火而(er)不(bu)能工作,當然(ran)汽(qi)(qi)(qi)車(che)(che)(che)(che)也不(bu)能起(qi)(qi)步(bu)。 因此(ci),我(wo)們就需(xu)要離(li)合(he)器(qi)(qi)的(de)(de)(de)幫助了。在(zai)發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)起(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)后,汽(qi)(qi)(qi)車(che)(che)(che)(che)起(qi)(qi)步(bu)之前(qian)(qian),駕(jia)駛員先踩下(xia)離(li)合(he)器(qi)(qi)踏板,將(jiang)離(li)合(he)器(qi)(qi)分(fen)離(li),使發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)和傳動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)系(xi)脫開,再(zai)將(jiang)變速器(qi)(qi)掛上(shang)檔(dang),然(ran)后逐(zhu)漸松開離(li)合(he)器(qi)(qi)踏板,使離(li)合(he)器(qi)(qi)逐(zhu)漸接(jie)合(he)。在(zai)接(jie)合(he)過程(cheng)中(zhong),發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)所受阻(zu)力矩(ju)(ju)逐(zhu)漸增大,故應(ying)同時(shi)(shi)逐(zhu)漸踩下(xia)加(jia)速踏板,即逐(zhu)步(bu)增加(jia)對發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)的(de)(de)(de)燃料供給量,使發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)的(de)(de)(de)轉(zhuan)速始(shi)終保持(chi)在(zai)最低穩(wen)定(ding)轉(zhuan)速上(shang),而(er)不(bu)致(zhi)熄火。同時(shi)(shi),由于離(li)合(he)器(qi)(qi)的(de)(de)(de)接(jie)合(he)緊密(mi)程(cheng)度逐(zhu)漸增大,發(fa)(fa)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)機(ji)經(jing)傳動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)系(xi)傳給驅動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)車(che)(che)(che)(che)輪(lun)的(de)(de)(de)轉(zhuan)矩(ju)(ju)便逐(zhu)漸增加(jia),到牽引力足(zu)以克服起(qi)(qi)步(bu)阻(zu)力時(shi)(shi),汽(qi)(qi)(qi)車(che)(che)(che)(che)即從靜(jing)止開始(shi)運動(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)并(bing)逐(zhu)步(bu)加(jia)速
2、保(bao)證傳動(dong)系換檔(dang)(dang)時工(gong)作平(ping)順 2:實(shi)現平(ping)順的(de)(de)換檔(dang)(dang) 在汽車行(xing)駛(shi)過程中,為適應(ying)不(bu)斷變化的(de)(de)行(xing)駛(shi)條件,傳動(dong)系經常(chang)要更換不(bu)同檔(dang)(dang)位(wei)(wei)工(gong)作。實(shi)現齒輪式變速器(qi)的(de)(de)換檔(dang)(dang),一(yi)(yi)般是撥(bo)動(dong)齒輪或其他掛檔(dang)(dang)機構,使原用檔(dang)(dang)位(wei)(wei)的(de)(de)某一(yi)(yi)齒輪副(fu)(fu)推出傳動(dong),再使另一(yi)(yi)檔(dang)(dang)位(wei)(wei)的(de)(de)齒輪副(fu)(fu)進入工(gong)作。在換檔(dang)(dang)前(qian)必須踩下離合(he)器(qi)踏(ta)板,中斷動(dong)力傳動(dong),便于使原檔(dang)(dang)位(wei)(wei)的(de)(de)嚙(nie)合(he)副(fu)(fu)脫開,同時使新檔(dang)(dang)位(wei)(wei)嚙(nie)合(he)副(fu)(fu)的(de)(de)嚙(nie)合(he)部位(wei)(wei)的(de)(de)速度逐步(bu)趨向同步(bu),這樣進入嚙(nie)合(he)時的(de)(de)沖擊可以大大的(de)(de)減小(xiao),實(shi)現平(ping)順的(de)(de)換檔(dang)(dang)。
3、防(fang)止(zhi)傳(chuan)動(dong)(dong)系(xi)過載 當汽車進行緊急制動(dong)(dong)時,若沒(mei)有(you)離(li)合器,則發(fa)動(dong)(dong)機將因(yin)和傳(chuan)動(dong)(dong)系(xi)剛(gang)性連接而(er)急劇降低轉速,因(yin)而(er)其(qi)(qi)中所有(you)運動(dong)(dong)件將產(chan)生(sheng)很(hen)大的慣性力(li)(li)矩(ju)(其(qi)(qi)數值可(ke)能(neng)(neng)大大超(chao)過發(fa)動(dong)(dong)機正常(chang)工作時所發(fa)出(chu)的最大扭距),對傳(chuan)動(dong)(dong)系(xi)造成(cheng)超(chao)過其(qi)(qi)承(cheng)載能(neng)(neng)力(li)(li)的載荷,而(er)使機件損壞。有(you)了離(li)合器,便可(ke)以依靠離(li)合器主動(dong)(dong)部分和從(cong)動(dong)(dong)部分之間可(ke)能(neng)(neng)產(chan)生(sheng)的相對運動(dong)(dong)以消(xiao)除這一(yi)危險。因(yin)此(ci),我們需要離(li)合器來限制傳(chuan)動(dong)(dong)系(xi)所承(cheng)受的最大扭距,保證安(an)全。 離(li)合器可(ke)分為(wei):摩擦離(li)合器,或(huo)是(shi)利用(yong)液體(ti)作為(wei)傳(chuan)動(dong)(dong)的介質(即液力(li)(li)偶合器),或(huo)是(shi)利用(yong)磁(ci)力(li)(li)傳(chuan)動(dong)(dong)(即電磁(ci)離(li)合器}
離合器撥叉是汽車變速箱的一部分,屬于變速箱附件,主要用于離合器換擋。與變速手柄連接,位于手柄下端,撥動中間變速輪改變輸入輸出速比。撥叉一般是指手動變速箱的汽車,位于變速箱和發動機之間的離合器系統中。
踏板通過傳動系統將力傳遞給撥叉,撥叉推動分離軸承壓下離合器壓盤,將發動機和變速箱之間的動力傳遞分離。離合器接合時,踏板處于最高位置,分離桿和分離軸承之間有間隙δ。壓盤在壓緊彈簧的作用下壓緊從動盤,發動機的扭矩通過飛輪和壓盤傳遞到從動盤,再傳遞到變速器的第一軸。
離合器傳遞的最大扭矩取決于從動盤摩擦面的最大靜摩擦力。它與摩擦表面之間的壓力、摩擦面積和摩擦材料的性能有關。對于具有一定結構的離合器,其最大靜摩擦力是一個固定值。如果傳動系統傳遞的扭矩超過這個固定值,離合器就會打滑,從而起到過載保護的作用。
獵豹(bao)汽車(che)宣布(bu)CS9 EV360車(che)型正式上市(shi),新車(che)共推(tui)出兩款車(che)型,NEDC工況(kuang)續(xu)航(hang)里程(cheng)達360km。補貼(tie)前售價(jia)為20.58-21.58萬元,補貼(tie)后售價(jia)為12.68-13.68萬元,6月25日前購車(che)全額享受(shou)2018年新能(neng)源(yuan)補貼(tie)。
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