減(jian)震(zhen)(zhen)器(qi)(qi)(Absorber) ,減(jian)震(zhen)(zhen)器(qi)(qi)主(zhu)要(yao)用(yong)來(lai)抑制(zhi)彈(dan)(dan)簧吸震(zhen)(zhen)后反(fan)彈(dan)(dan)時(shi)(shi)的(de)(de)震(zhen)(zhen)蕩及來(lai)自(zi)路面(mian)(mian)的(de)(de)沖擊。在經(jing)過(guo)不平路面(mian)(mian)時(shi)(shi),雖然吸震(zhen)(zhen)彈(dan)(dan)簧可以過(guo)濾路面(mian)(mian)的(de)(de)震(zhen)(zhen)動(dong),但彈(dan)(dan)簧自(zi)身還會有(you)往(wang)復(fu)運動(dong),而(er)減(jian)震(zhen)(zhen)器(qi)(qi)就(jiu)是(shi)用(yong)來(lai)抑制(zhi)這種彈(dan)(dan)簧跳躍(yue)的(de)(de)。減(jian)震(zhen)(zhen)器(qi)(qi)太(tai)軟,車(che)身就(jiu)會上下跳躍(yue),減(jian)震(zhen)(zhen)器(qi)(qi)太(tai)硬就(jiu)會帶(dai)來(lai)太(tai)大的(de)(de)阻(zu)力,妨礙彈(dan)(dan)簧正(zheng)常工作。在關于懸掛(gua)系統(tong)的(de)(de)改(gai)裝過(guo)程中,硬的(de)(de)減(jian)震(zhen)(zhen)器(qi)(qi)要(yao)與硬的(de)(de)彈(dan)(dan)簧相(xiang)搭配,而(er)彈(dan)(dan)簧的(de)(de)硬度又與車(che)重息(xi)(xi)息(xi)(xi)相(xiang)關,因此(ci)較重的(de)(de)車(che)一般采用(yong)較硬的(de)(de)減(jian)震(zhen)(zhen)器(qi)(qi)。與引(yin)震(zhen)(zhen)曲(qu)(qu)軸(zhou)相(xiang)接的(de)(de)裝置,用(yong)來(lai)抗衡曲(qu)(qu)軸(zhou)的(de)(de)扭轉震(zhen)(zhen)動(dong)(即曲(qu)(qu)軸(zhou)受汽缸點火的(de)(de)沖擊力而(er)扭動(dong)的(de)(de)現(xian)象(xiang))。
懸(xuan)架(jia)系統中(zhong)(zhong)(zhong)由于彈(dan)性(xing)元(yuan)件(jian)受沖擊產(chan)生震(zhen)動(dong)(dong)(dong),為(wei)改善(shan)汽車(che)(che)行駛平順性(xing),懸(xuan)架(jia)中(zhong)(zhong)(zhong)與彈(dan)性(xing)元(yuan)件(jian)并(bing)聯安裝減(jian)(jian)(jian)震(zhen)器(qi),為(wei)衰減(jian)(jian)(jian)震(zhen)動(dong)(dong)(dong),汽車(che)(che)懸(xuan)架(jia)系統中(zhong)(zhong)(zhong)采用(yong)減(jian)(jian)(jian)震(zhen)器(qi)多是液(ye)(ye)力減(jian)(jian)(jian)震(zhen)器(qi),其工作原理是當車(che)(che)架(jia)(或車(che)(che)身)和(he)車(che)(che)橋(qiao)間(jian)震(zhen)動(dong)(dong)(dong)而出現相對運動(dong)(dong)(dong)時(shi),減(jian)(jian)(jian)震(zhen)器(qi)內的(de)(de)活(huo)塞上下移動(dong)(dong)(dong),減(jian)(jian)(jian)震(zhen)器(qi)腔內的(de)(de)油(you)液(ye)(ye)便(bian)反復地從一個(ge)腔經過不同的(de)(de)孔隙流(liu)入另一個(ge)腔內。此時(shi)孔壁(bi)與油(you)液(ye)(ye)間(jian)的(de)(de)摩擦(ca)和(he)油(you)液(ye)(ye)分子(zi)間(jian)的(de)(de)內摩擦(ca)對震(zhen)動(dong)(dong)(dong)形成阻尼力,使汽車(che)(che)震(zhen)動(dong)(dong)(dong)能量轉化為(wei)油(you)液(ye)(ye)熱能,再由減(jian)(jian)(jian)震(zhen)器(qi)吸收散(san)發到(dao)大氣中(zhong)(zhong)(zhong)。在油(you)液(ye)(ye)通(tong)道截面和(he)等因素不變(bian)時(shi),阻尼力隨車(che)(che)架(jia)與車(che)(che)橋(qiao)(或車(che)(che)輪)之間(jian)的(de)(de)相對運動(dong)(dong)(dong)速度增減(jian)(jian)(jian),并(bing)與油(you)液(ye)(ye)粘度有關(guan)[1] 。
減震器(qi)與彈性(xing)(xing)元件承擔著緩(huan)沖(chong)擊和(he)減震的任務,阻尼力過大,將使懸架彈性(xing)(xing)變壞,甚至使減震器(qi)連接(jie)件損壞。因而要調(diao)節(jie)彈性(xing)(xing)元件和(he)減震器(qi)這一矛盾。
(1) 在(zai)壓縮行程(車(che)橋和(he)車(che)架相互靠(kao)近),減震器阻尼力較(jiao)小,以便充(chong)分發(fa)揮彈性元件的彈性作用(yong),緩和(he)沖擊。這(zhe)時,彈性元件起主要作用(yong)。
(2) 在懸架伸張行(xing)程中(車橋和(he)車架相互遠離),減震器阻尼力應(ying)大,迅(xun)速減震。
(3) 當車橋(qiao)(或車輪)與車橋(qiao)間(jian)的相對速度過大時,要(yao)求減(jian)震器能(neng)自(zi)動(dong)加(jia)大液流量,使阻尼力(li)始終(zhong)保持在(zai)一定(ding)限度之內,以避免承(cheng)受過大的沖擊載(zai)荷。
在汽車懸架系統中(zhong)廣(guang)泛(fan)采(cai)用(yong)(yong)的是(shi)筒式減(jian)(jian)震器(qi)(qi),且在壓縮和伸張行程(cheng)中(zhong)均能起減(jian)(jian)震作用(yong)(yong)叫雙(shuang)向作用(yong)(yong)式減(jian)(jian)震器(qi)(qi),還有采(cai)用(yong)(yong)新式減(jian)(jian)震器(qi)(qi),它包括充氣式減(jian)(jian)震器(qi)(qi)和阻力可調式減(jian)(jian)震器(qi)(qi)。
汽車減振器的安裝方法如(ru)下:
1、將車(che)輛駛入工位,正確停放。將舉(ju)升機支(zhi)撐(cheng)座伸入車(che)輛底部,確保支(zhi)撐(cheng)座和車(che)輛車(che)身支(zhi)撐(cheng)點(dian)良(liang)好接觸。取下接雨板、雨刷器(qi),拆卸輪(lun)胎,拆卸下來(lai)的(de)輪(lun)胎平穩的(de)放在(zai)地上,外側朝上,將輪(lun)胎螺絲放在(zai)工具車(che)上;
2、逐(zhu)步拆(chai)(chai)(chai)卸(xie)連(lian)(lian)接桿(gan)的(de)螺絲,剎車(che)油管螺絲,剎車(che)ABS線(xian)。螺絲拆(chai)(chai)(chai)卸(xie)后整(zheng)理好放在工(gong)具車(che)上(注(zhu)(zhu)意(yi):小心拆(chai)(chai)(chai)卸(xie)油管和ABS線(xian)不要損壞(huai))半(ban)軸(zhou)螺帽(mao)取(qu)下,拆(chai)(chai)(chai)下自動系統(tong)。(注(zhu)(zhu)意(yi):合理固定卡鉗,不要損壞(huai)油管。)拆(chai)(chai)(chai)下方向拉(la)桿(gan)(注(zhu)(zhu)意(yi):用專用工(gong)具取(qu)下球(qiu)(qiu)頭)拆(chai)(chai)(chai)下車(che)身高度傳感器(注(zhu)(zhu)意(yi):小心拆(chai)(chai)(chai)下,不要損壞(huai))拆(chai)(chai)(chai)下下控制臂球(qiu)(qiu)頭取(qu)下上座連(lian)(lian)接螺栓,將減(jian)震(zhen)器總成(cheng)及轉(zhuan)向節總成(cheng)一并拿出。(注(zhu)(zhu)意(yi):需(xu)兩(liang)人配(pei)合操作,避免更(geng)換(huan)相關(guan)部(bu)件損壞(huai));
3、原(yuan)車(che)減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)(qi)總(zong)(zong)(zong)成(cheng)已拆卸完(wan)成(cheng),開始更換新的減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)(qi)總(zong)(zong)(zong)成(cheng)。取(qu)出新的減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)(qi)總(zong)(zong)(zong)成(cheng),對比新舊(jiu)無誤后(hou)方能安裝(zhuang)(zhuang)(zhuang)(zhuang)。將(jiang)新的減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)(qi)總(zong)(zong)(zong)成(cheng)安裝(zhuang)(zhuang)(zhuang)(zhuang)在轉向(xiang)節總(zong)(zong)(zong)成(cheng)上,將(jiang)減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)(qi)總(zong)(zong)(zong)成(cheng)及轉向(xiang)節總(zong)(zong)(zong)成(cheng)一同裝(zhuang)(zhuang)(zhuang)(zhuang)配(pei)回車(che)輛。把(ba)ABS線(xian)、油管(guan)、拉桿球頭恢復原(yuan)位(wei)。將(jiang)自動系統全部復原(yuan),仔細(xi)檢查(cha)油管(guan)及其(qi)他線(xian)路有無干(gan)涉。將(jiang)車(che)胎裝(zhuang)(zhuang)(zhuang)(zhuang)配(pei)回車(che)(注意(yi):仔細(xi)擰緊輪胎螺栓)依次將(jiang)接雨板、雨刷器(qi)(qi)(qi)裝(zhuang)(zhuang)(zhuang)(zhuang)配(pei)回原(yuan)車(che)。(注意(yi):安裝(zhuang)(zhuang)(zhuang)(zhuang)完(wan)成(cheng)之后(hou),要記(ji)得調試雨刷器(qi)(qi)(qi))安裝(zhuang)(zhuang)(zhuang)(zhuang)完(wan)畢(bi),進(jin)行路試
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