減(jian)(jian)震器(qi)(qi)(Absorber) ,減(jian)(jian)震器(qi)(qi)主(zhu)要(yao)用(yong)(yong)(yong)來(lai)抑制(zhi)彈(dan)簧(huang)吸震后反彈(dan)時(shi)的(de)(de)(de)(de)震蕩及來(lai)自路(lu)面的(de)(de)(de)(de)沖擊(ji)。在經過不平(ping)路(lu)面時(shi),雖然吸震彈(dan)簧(huang)可以(yi)過濾路(lu)面的(de)(de)(de)(de)震動(dong)(dong)(dong),但彈(dan)簧(huang)自身(shen)還會(hui)(hui)有往復運動(dong)(dong)(dong),而減(jian)(jian)震器(qi)(qi)就(jiu)是用(yong)(yong)(yong)來(lai)抑制(zhi)這(zhe)種彈(dan)簧(huang)跳(tiao)(tiao)躍的(de)(de)(de)(de)。減(jian)(jian)震器(qi)(qi)太軟,車(che)身(shen)就(jiu)會(hui)(hui)上下跳(tiao)(tiao)躍,減(jian)(jian)震器(qi)(qi)太硬就(jiu)會(hui)(hui)帶來(lai)太大的(de)(de)(de)(de)阻力,妨礙彈(dan)簧(huang)正常工(gong)作。在關于懸掛系統的(de)(de)(de)(de)改裝過程中,硬的(de)(de)(de)(de)減(jian)(jian)震器(qi)(qi)要(yao)與(yu)(yu)(yu)硬的(de)(de)(de)(de)彈(dan)簧(huang)相(xiang)搭配,而彈(dan)簧(huang)的(de)(de)(de)(de)硬度又與(yu)(yu)(yu)車(che)重息(xi)息(xi)相(xiang)關,因此較重的(de)(de)(de)(de)車(che)一般采用(yong)(yong)(yong)較硬的(de)(de)(de)(de)減(jian)(jian)震器(qi)(qi)。與(yu)(yu)(yu)引震曲軸相(xiang)接(jie)的(de)(de)(de)(de)裝置,用(yong)(yong)(yong)來(lai)抗衡曲軸的(de)(de)(de)(de)扭轉震動(dong)(dong)(dong)(即曲軸受汽缸(gang)點火(huo)的(de)(de)(de)(de)沖擊(ji)力而扭動(dong)(dong)(dong)的(de)(de)(de)(de)現象)。
懸架系統(tong)中由(you)于彈性(xing)元件(jian)受沖(chong)擊(ji)產生震(zhen)動(dong)(dong)(dong)(dong),為改(gai)善(shan)汽車(che)(che)行駛(shi)平順性(xing),懸架中與彈性(xing)元件(jian)并聯安裝減震(zhen)器(qi),為衰減震(zhen)動(dong)(dong)(dong)(dong),汽車(che)(che)懸架系統(tong)中采(cai)用減震(zhen)器(qi)多(duo)是液(ye)力(li)減震(zhen)器(qi),其工作原理(li)是當車(che)(che)架(或(huo)車(che)(che)身)和(he)車(che)(che)橋間(jian)震(zhen)動(dong)(dong)(dong)(dong)而出現相對(dui)運(yun)動(dong)(dong)(dong)(dong)時,減震(zhen)器(qi)內的(de)(de)(de)活(huo)塞上下移動(dong)(dong)(dong)(dong),減震(zhen)器(qi)腔內的(de)(de)(de)油(you)(you)液(ye)便(bian)反復地從一個腔經(jing)過不(bu)同的(de)(de)(de)孔(kong)隙流(liu)入另(ling)一個腔內。此時孔(kong)壁(bi)與油(you)(you)液(ye)間(jian)的(de)(de)(de)摩擦和(he)油(you)(you)液(ye)分(fen)子(zi)間(jian)的(de)(de)(de)內摩擦對(dui)震(zhen)動(dong)(dong)(dong)(dong)形(xing)成阻(zu)尼力(li),使汽車(che)(che)震(zhen)動(dong)(dong)(dong)(dong)能量(liang)轉化為油(you)(you)液(ye)熱能,再由(you)減震(zhen)器(qi)吸(xi)收散發(fa)到大氣中。在油(you)(you)液(ye)通道(dao)截(jie)面和(he)等因素(su)不(bu)變時,阻(zu)尼力(li)隨車(che)(che)架與車(che)(che)橋(或(huo)車(che)(che)輪)之間(jian)的(de)(de)(de)相對(dui)運(yun)動(dong)(dong)(dong)(dong)速度增減,并與油(you)(you)液(ye)粘度有關[1] 。
減震(zhen)器(qi)與彈(dan)性元件(jian)承(cheng)擔著緩沖擊和減震(zhen)的任務(wu),阻(zu)尼(ni)力過大,將(jiang)使懸架彈(dan)性變壞,甚至使減震(zhen)器(qi)連接件(jian)損壞。因而要調節彈(dan)性元件(jian)和減震(zhen)器(qi)這一矛盾。
(1) 在壓縮行程(車橋和車架相互靠近),減(jian)震器(qi)阻尼力較小,以便充分發揮彈性元件的(de)彈性作(zuo)用(yong)(yong),緩和沖擊。這(zhe)時,彈性元件起(qi)主要(yao)作(zuo)用(yong)(yong)。
(2) 在懸(xuan)架伸張行(xing)程中(車(che)橋和車(che)架相互(hu)遠離),減震器阻尼(ni)力應大,迅速減震。
(3) 當車(che)橋(或車(che)輪(lun))與(yu)車(che)橋間(jian)的相(xiang)對速度過大時(shi),要(yao)求(qiu)減震器能自動加大液流量,使阻尼力始終保持在一(yi)定限度之內,以避免承受(shou)過大的沖(chong)擊載荷。
在(zai)汽車懸架系統(tong)中廣泛采用的是筒式(shi)減(jian)(jian)震器(qi),且在(zai)壓縮和伸張行程中均(jun)能起減(jian)(jian)震作用叫雙向(xiang)作用式(shi)減(jian)(jian)震器(qi),還有采用新式(shi)減(jian)(jian)震器(qi),它包(bao)括充氣(qi)式(shi)減(jian)(jian)震器(qi)和阻力可調式(shi)減(jian)(jian)震器(qi)。
汽車減振器的安裝方法如下:
1、將(jiang)車(che)輛(liang)駛入工位,正確停放。將(jiang)舉(ju)升機支撐(cheng)座伸(shen)入車(che)輛(liang)底部,確保支撐(cheng)座和車(che)輛(liang)車(che)身支撐(cheng)點良好接觸。取下(xia)接雨(yu)板、雨(yu)刷器,拆卸(xie)輪胎,拆卸(xie)下(xia)來的輪胎平(ping)穩的放在地上(shang)(shang),外側朝上(shang)(shang),將(jiang)輪胎螺(luo)絲(si)放在工具車(che)上(shang)(shang);
2、逐(zhu)步拆(chai)卸(xie)連接桿的(de)螺絲,剎(cha)車油管(guan)螺絲,剎(cha)車ABS線。螺絲拆(chai)卸(xie)后整理好(hao)放(fang)在工具(ju)車上(注意:小心(xin)拆(chai)卸(xie)油管(guan)和ABS線不要(yao)(yao)損(sun)壞)半(ban)軸螺帽取下(xia)(xia)(xia)(xia),拆(chai)下(xia)(xia)(xia)(xia)自動系統。(注意:合理固定卡鉗,不要(yao)(yao)損(sun)壞油管(guan)。)拆(chai)下(xia)(xia)(xia)(xia)方向(xiang)(xiang)拉桿(注意:用專(zhuan)用工具(ju)取下(xia)(xia)(xia)(xia)球頭)拆(chai)下(xia)(xia)(xia)(xia)車身高(gao)度傳感器(注意:小心(xin)拆(chai)下(xia)(xia)(xia)(xia),不要(yao)(yao)損(sun)壞)拆(chai)下(xia)(xia)(xia)(xia)下(xia)(xia)(xia)(xia)控制(zhi)臂球頭取下(xia)(xia)(xia)(xia)上座連接螺栓,將減震(zhen)器總成及轉(zhuan)向(xiang)(xiang)節總成一(yi)并拿出。(注意:需兩人配合操作,避(bi)免更換相(xiang)關部(bu)件損(sun)壞);
3、原(yuan)(yuan)(yuan)車(che)減(jian)(jian)(jian)震(zhen)器(qi)總成(cheng)(cheng)(cheng)(cheng)已拆卸完成(cheng)(cheng)(cheng)(cheng),開(kai)始更換(huan)新(xin)(xin)的減(jian)(jian)(jian)震(zhen)器(qi)總成(cheng)(cheng)(cheng)(cheng)。取出新(xin)(xin)的減(jian)(jian)(jian)震(zhen)器(qi)總成(cheng)(cheng)(cheng)(cheng),對比新(xin)(xin)舊無誤后(hou)方能(neng)安(an)裝(zhuang)。將(jiang)新(xin)(xin)的減(jian)(jian)(jian)震(zhen)器(qi)總成(cheng)(cheng)(cheng)(cheng)安(an)裝(zhuang)在轉向(xiang)節(jie)總成(cheng)(cheng)(cheng)(cheng)上,將(jiang)減(jian)(jian)(jian)震(zhen)器(qi)總成(cheng)(cheng)(cheng)(cheng)及轉向(xiang)節(jie)總成(cheng)(cheng)(cheng)(cheng)一同裝(zhuang)配(pei)回車(che)輛。把ABS線、油(you)管、拉桿(gan)球頭(tou)恢復原(yuan)(yuan)(yuan)位。將(jiang)自動系統(tong)全部復原(yuan)(yuan)(yuan),仔(zi)細(xi)檢查油(you)管及其他線路有無干涉。將(jiang)車(che)胎(tai)(tai)裝(zhuang)配(pei)回車(che)(注意(yi):仔(zi)細(xi)擰緊輪胎(tai)(tai)螺栓)依次將(jiang)接雨(yu)(yu)板(ban)、雨(yu)(yu)刷器(qi)裝(zhuang)配(pei)回原(yuan)(yuan)(yuan)車(che)。(注意(yi):安(an)裝(zhuang)完成(cheng)(cheng)(cheng)(cheng)之后(hou),要(yao)記(ji)得調試(shi)雨(yu)(yu)刷器(qi))安(an)裝(zhuang)完畢,進行路試(shi)
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