氣門挺桿。氣門挺桿的作用如下:
1、為了保證氣門關閉嚴密,會在氣門桿端與氣門驅動件之間留有適當的間隙,稱為氣門間隙;
2、若氣門間隙調整不當就會使發動機運行不正常的,過大會影響氣門的開啟量,氣門升程減少引起進氣不足,排氣不徹底,過小會引起氣門關閉不嚴引起漏氣,造成動力下降;
3、所以為了避免氣門間隙調整不當引起的麻煩,一般高速發動機上都會使用可自行調整氣門間隙的液力挺桿。
汽(qi)(qi)車(che)的(de)(de)(de)(de)發(fa)動(dong)(dong)(dong)(dong)(dong)機相(xiang)當于汽(qi)(qi)車(che)的(de)(de)(de)(de)心臟。發(fa)動(dong)(dong)(dong)(dong)(dong)機故(gu)障也(ye)是困擾車(che)友的(de)(de)(de)(de)問題,氣(qi)門挺(ting)(ting)(ting)(ting)(ting)桿(gan)是發(fa)動(dong)(dong)(dong)(dong)(dong)機的(de)(de)(de)(de)重(zhong)要(yao)部(bu)件(jian)。接下來(lai)就(jiu)讓(rang)典邦(bang)給大家(jia)介(jie)紹一下氣(qi)門挺(ting)(ting)(ting)(ting)(ting)桿(gan)的(de)(de)(de)(de)作用(yong)吧!氣(qi)門挺(ting)(ting)(ting)(ting)(ting)桿(gan)的(de)(de)(de)(de)功能(neng),氣(qi)門挺(ting)(ting)(ting)(ting)(ting)桿(gan)簡介(jie)-功能(neng)也(ye)是用(yong)于推動(dong)(dong)(dong)(dong)(dong)氣(qi)門打開(kai)的(de)(de)(de)(de)裝置(zhi)。因為早期(qi)發(fa)動(dong)(dong)(dong)(dong)(dong)機中使用(yong)的(de)(de)(de)(de)這種裝置(zhi)形狀像一根細桿(gan),所以被(bei)稱為氣(qi)門挺(ting)(ting)(ting)(ting)(ting)桿(gan)。它的(de)(de)(de)(de)主要(yao)功能(neng)是將凸(tu)(tu)輪(lun)的(de)(de)(de)(de)旋(xuan)轉運動(dong)(dong)(dong)(dong)(dong)轉化為往復運動(dong)(dong)(dong)(dong)(dong)。但這種結構的(de)(de)(de)(de)發(fa)動(dong)(dong)(dong)(dong)(dong)機凸(tu)(tu)輪(lun)軸(zhou)一般不布置(zhi)在(zai)發(fa)動(dong)(dong)(dong)(dong)(dong)機頂部(bu)。隨著(zhu)現代汽(qi)(qi)車(che)發(fa)動(dong)(dong)(dong)(dong)(dong)機技術的(de)(de)(de)(de)發(fa)展,越來(lai)越多的(de)(de)(de)(de)汽(qi)(qi)車(che)發(fa)動(dong)(dong)(dong)(dong)(dong)機采用(yong)頂置(zhi)凸(tu)(tu)輪(lun)軸(zhou)結構,其中傳統的(de)(de)(de)(de)長氣(qi)門挺(ting)(ting)(ting)(ting)(ting)柱(zhu)基本(ben)取消,取而代之(zhi)的(de)(de)(de)(de)是由(you)凸(tu)(tu)輪(lun)軸(zhou)驅(qu)動(dong)(dong)(dong)(dong)(dong)的(de)(de)(de)(de)更(geng)加緊湊的(de)(de)(de)(de)液(ye)壓(ya)挺(ting)(ting)(ting)(ting)(ting)柱(zhu),或(huo)者凸(tu)(tu)輪(lun)軸(zhou)直(zhi)接驅(qu)動(dong)(dong)(dong)(dong)(dong)氣(qi)門搖臂來(lai)控制氣(qi)門的(de)(de)(de)(de)開(kai)閉。液(ye)壓(ya)杠桿(gan)主要(yao)由(you)柱(zhu)塞(sai)、單向閥(fa)(fa)和(he)單向閥(fa)(fa)彈簧(huang)組成。液(ye)壓(ya)桿(gan)始終與凸(tu)(tu)輪(lun)軸(zhou)接觸,并且無間(jian)隙運行。在(zai)挺(ting)(ting)(ting)(ting)(ting)桿(gan)內(nei)部(bu),液(ye)壓(ya)用(yong)于調整間(jian)隙。液(ye)壓(ya)挺(ting)(ting)(ting)(ting)(ting)柱(zhu)主要(yao)由(you)柱(zhu)塞(sai)、單向閥(fa)(fa)和(he)單向閥(fa)(fa)彈簧(huang)組成。止回閥(fa)(fa)用(yong)于儲存或(huo)釋放油。通過改變挺(ting)(ting)(ting)(ting)(ting)柱(zhu)腔內(nei)的(de)(de)(de)(de)油壓(ya),可(ke)以改變液(ye)壓(ya)挺(ting)(ting)(ting)(ting)(ting)柱(zhu)的(de)(de)(de)(de)工(gong)作長度,從而自(zi)動(dong)(dong)(dong)(dong)(dong)調整氣(qi)門間(jian)隙。
北(bei)汽是國(guo)內(nei)(nei)歷史最悠久的(de)(de)(de)越(yue)野(ye)車制造商(shang)。過(guo)去,它(ta)(ta)的(de)(de)(de)名字始終和212越(yue)野(ye)車聯系在一起(qi),但(dan)它(ta)(ta)現(xian)在已不(bu)只在低(di)檔(dang)越(yue)野(ye)車市(shi)場(chang)上打(da)拼,陸霸(ba)就是它(ta)(ta)進軍中高檔(dang)SUV市(shi)場(chang)的(de)(de)(de)一把利(li)器(qi)。陸霸(ba)的(de)(de)(de)原型車是豐田霸(ba)道(dao)。霸(ba)道(dao)的(de)(de)(de)2700和3400在國(guo)內(nei)(nei)已有了相當大的(de)(de)(de)保有量。即(ji)雙(shuang)橫臂式、螺旋彈簧(huang)、帶橫向穩定(ding)桿(gan)的(de)(de)(de)獨立前懸(xuan)架及四連桿(gan)機構(gou)、螺旋彈簧(huang)、帶有橫向穩定(ding)和推(tui)力桿(gan)的(de)(de)(de)后懸(xuan)架。
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