1、保(bao)證(zheng)汽(qi)(qi)車(che)(che)平穩起(qi)(qi)(qi)步(bu)(bu)(bu) 這(zhe)是(shi)(shi)離(li)合(he)(he)器(qi)(qi)的(de)(de)首(shou)要功能(neng)。在(zai)(zai)汽(qi)(qi)車(che)(che)起(qi)(qi)(qi)步(bu)(bu)(bu)前,自然要先(xian)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)。而汽(qi)(qi)車(che)(che)起(qi)(qi)(qi)步(bu)(bu)(bu)時(shi)(shi)(shi)(shi),汽(qi)(qi)車(che)(che)是(shi)(shi)從完全(quan)靜(jing)(jing)止(zhi)的(de)(de)狀態逐(zhu)(zhu)(zhu)步(bu)(bu)(bu)加(jia)速(su)的(de)(de)。如(ru)果傳(chuan)動(dong)(dong)(dong)(dong)(dong)(dong)系(xi)(xi)(xi)(它聯系(xi)(xi)(xi)著整個(ge)汽(qi)(qi)車(che)(che))與(yu)發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)剛性(xing)地(di)(di)聯系(xi)(xi)(xi),則變速(su)器(qi)(qi)一掛(gua)上(shang)(shang)檔(dang),汽(qi)(qi)車(che)(che)將(jiang)(jiang)突然向前沖一下(xia),但(dan)并不(bu)(bu)能(neng)起(qi)(qi)(qi)步(bu)(bu)(bu)。這(zhe)是(shi)(shi)因(yin)為汽(qi)(qi)車(che)(che)從靜(jing)(jing)止(zhi)到前沖時(shi)(shi)(shi)(shi),產生很大慣(guan)性(xing)力(li),對(dui)發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)造成很大地(di)(di)阻(zu)力(li)矩。在(zai)(zai)這(zhe)慣(guan)性(xing)阻(zu)力(li)矩作用下(xia),發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)在(zai)(zai)瞬時(shi)(shi)(shi)(shi)間(jian)轉(zhuan)(zhuan)速(su)急劇下(xia)降到最低(di)(di)穩定(ding)轉(zhuan)(zhuan)速(su)(一般300-500RPM)以下(xia),發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)即熄(xi)火而不(bu)(bu)能(neng)工(gong)作,當然汽(qi)(qi)車(che)(che)也不(bu)(bu)能(neng)起(qi)(qi)(qi)步(bu)(bu)(bu)。 因(yin)此,我們就需要離(li)合(he)(he)器(qi)(qi)的(de)(de)幫助了。在(zai)(zai)發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)后(hou),汽(qi)(qi)車(che)(che)起(qi)(qi)(qi)步(bu)(bu)(bu)之前,駕駛員(yuan)先(xian)踩下(xia)離(li)合(he)(he)器(qi)(qi)踏(ta)板,將(jiang)(jiang)離(li)合(he)(he)器(qi)(qi)分離(li),使發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)和傳(chuan)動(dong)(dong)(dong)(dong)(dong)(dong)系(xi)(xi)(xi)脫開,再將(jiang)(jiang)變速(su)器(qi)(qi)掛(gua)上(shang)(shang)檔(dang),然后(hou)逐(zhu)(zhu)(zhu)漸松(song)開離(li)合(he)(he)器(qi)(qi)踏(ta)板,使離(li)合(he)(he)器(qi)(qi)逐(zhu)(zhu)(zhu)漸接(jie)合(he)(he)。在(zai)(zai)接(jie)合(he)(he)過(guo)程中,發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)所受阻(zu)力(li)矩逐(zhu)(zhu)(zhu)漸增大,故應同時(shi)(shi)(shi)(shi)逐(zhu)(zhu)(zhu)漸踩下(xia)加(jia)速(su)踏(ta)板,即逐(zhu)(zhu)(zhu)步(bu)(bu)(bu)增加(jia)對(dui)發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)的(de)(de)燃料供(gong)給量,使發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)的(de)(de)轉(zhuan)(zhuan)速(su)始終保(bao)持(chi)在(zai)(zai)最低(di)(di)穩定(ding)轉(zhuan)(zhuan)速(su)上(shang)(shang),而不(bu)(bu)致熄(xi)火。同時(shi)(shi)(shi)(shi),由于離(li)合(he)(he)器(qi)(qi)的(de)(de)接(jie)合(he)(he)緊密程度逐(zhu)(zhu)(zhu)漸增大,發動(dong)(dong)(dong)(dong)(dong)(dong)機(ji)經(jing)傳(chuan)動(dong)(dong)(dong)(dong)(dong)(dong)系(xi)(xi)(xi)傳(chuan)給驅(qu)動(dong)(dong)(dong)(dong)(dong)(dong)車(che)(che)輪的(de)(de)轉(zhuan)(zhuan)矩便逐(zhu)(zhu)(zhu)漸增加(jia),到牽引力(li)足以克服(fu)起(qi)(qi)(qi)步(bu)(bu)(bu)阻(zu)力(li)時(shi)(shi)(shi)(shi),汽(qi)(qi)車(che)(che)即從靜(jing)(jing)止(zhi)開始運動(dong)(dong)(dong)(dong)(dong)(dong)并逐(zhu)(zhu)(zhu)步(bu)(bu)(bu)加(jia)速(su)
2、保證傳(chuan)(chuan)動(dong)系換(huan)(huan)檔(dang)(dang)(dang)(dang)時(shi)工(gong)作(zuo)平順(shun)(shun) 2:實(shi)現平順(shun)(shun)的換(huan)(huan)檔(dang)(dang)(dang)(dang) 在汽車行(xing)駛過程中(zhong),為適(shi)應不斷(duan)變(bian)化的行(xing)駛條件,傳(chuan)(chuan)動(dong)系經常要更換(huan)(huan)不同檔(dang)(dang)(dang)(dang)位工(gong)作(zuo)。實(shi)現齒(chi)(chi)輪式(shi)變(bian)速(su)器的換(huan)(huan)檔(dang)(dang)(dang)(dang),一般是(shi)撥動(dong)齒(chi)(chi)輪或(huo)其(qi)他掛檔(dang)(dang)(dang)(dang)機構,使(shi)原用檔(dang)(dang)(dang)(dang)位的某一齒(chi)(chi)輪副(fu)推(tui)出傳(chuan)(chuan)動(dong),再使(shi)另一檔(dang)(dang)(dang)(dang)位的齒(chi)(chi)輪副(fu)進入工(gong)作(zuo)。在換(huan)(huan)檔(dang)(dang)(dang)(dang)前必須(xu)踩下離合(he)(he)器踏板,中(zhong)斷(duan)動(dong)力(li)傳(chuan)(chuan)動(dong),便(bian)于使(shi)原檔(dang)(dang)(dang)(dang)位的嚙合(he)(he)副(fu)脫開,同時(shi)使(shi)新檔(dang)(dang)(dang)(dang)位嚙合(he)(he)副(fu)的嚙合(he)(he)部位的速(su)度逐步趨向同步,這樣進入嚙合(he)(he)時(shi)的沖(chong)擊可以大大的減(jian)小,實(shi)現平順(shun)(shun)的換(huan)(huan)檔(dang)(dang)(dang)(dang)。
3、防止傳(chuan)動(dong)(dong)(dong)(dong)(dong)系過(guo)(guo)載(zai) 當(dang)汽車進行緊(jin)急(ji)制動(dong)(dong)(dong)(dong)(dong)時(shi),若(ruo)沒有離(li)合(he)(he)(he)器,則發動(dong)(dong)(dong)(dong)(dong)機將因和(he)傳(chuan)動(dong)(dong)(dong)(dong)(dong)系剛性(xing)連接(jie)而(er)急(ji)劇降低轉速(su),因而(er)其中所(suo)有運(yun)動(dong)(dong)(dong)(dong)(dong)件將產生很大(da)的慣性(xing)力矩(其數(shu)值可(ke)(ke)能(neng)大(da)大(da)超(chao)過(guo)(guo)發動(dong)(dong)(dong)(dong)(dong)機正(zheng)常工作(zuo)時(shi)所(suo)發出的最大(da)扭(niu)距(ju)),對(dui)傳(chuan)動(dong)(dong)(dong)(dong)(dong)系造成(cheng)超(chao)過(guo)(guo)其承載(zai)能(neng)力的載(zai)荷,而(er)使機件損壞。有了離(li)合(he)(he)(he)器,便可(ke)(ke)以依靠離(li)合(he)(he)(he)器主(zhu)動(dong)(dong)(dong)(dong)(dong)部分(fen)和(he)從動(dong)(dong)(dong)(dong)(dong)部分(fen)之間(jian)可(ke)(ke)能(neng)產生的相(xiang)對(dui)運(yun)動(dong)(dong)(dong)(dong)(dong)以消除這一危險。因此,我們需要離(li)合(he)(he)(he)器來限(xian)制傳(chuan)動(dong)(dong)(dong)(dong)(dong)系所(suo)承受的最大(da)扭(niu)距(ju),保證安全。 離(li)合(he)(he)(he)器可(ke)(ke)分(fen)為:摩擦離(li)合(he)(he)(he)器,或是(shi)利用(yong)液(ye)體(ti)作(zuo)為傳(chuan)動(dong)(dong)(dong)(dong)(dong)的介質(即液(ye)力偶合(he)(he)(he)器),或是(shi)利用(yong)磁(ci)力傳(chuan)動(dong)(dong)(dong)(dong)(dong)(即電(dian)磁(ci)離(li)合(he)(he)(he)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。
2018款海星(xing)T22上(shang)市于2018年5月10日,由華晨鑫(xin)源生產(chan)制(zhi)造,定(ding)位微卡,官方指導價為3.14-3.68萬(wan)元,經銷(xiao)商報價3.14-3.68萬(wan)元。
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