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。
汽車的(de)(de)(de)(de)發(fa)(fa)(fa)動(dong)(dong)機(ji)相(xiang)當(dang)于汽車的(de)(de)(de)(de)心臟。發(fa)(fa)(fa)動(dong)(dong)機(ji)故障也(ye)是(shi)困擾車友(you)的(de)(de)(de)(de)問(wen)題(ti),氣(qi)(qi)(qi)門(men)挺(ting)(ting)(ting)(ting)桿(gan)(gan)是(shi)發(fa)(fa)(fa)動(dong)(dong)機(ji)的(de)(de)(de)(de)重要(yao)(yao)部件。接下(xia)來就讓(rang)典邦給大家(jia)介(jie)紹一下(xia)氣(qi)(qi)(qi)門(men)挺(ting)(ting)(ting)(ting)桿(gan)(gan)的(de)(de)(de)(de)作(zuo)用(yong)(yong)吧!氣(qi)(qi)(qi)門(men)挺(ting)(ting)(ting)(ting)桿(gan)(gan)的(de)(de)(de)(de)功能,氣(qi)(qi)(qi)門(men)挺(ting)(ting)(ting)(ting)桿(gan)(gan)簡介(jie)-功能也(ye)是(shi)用(yong)(yong)于推動(dong)(dong)氣(qi)(qi)(qi)門(men)打(da)開的(de)(de)(de)(de)裝置(zhi)。因為早(zao)期發(fa)(fa)(fa)動(dong)(dong)機(ji)中(zhong)使用(yong)(yong)的(de)(de)(de)(de)這種(zhong)(zhong)裝置(zhi)形狀像一根細桿(gan)(gan),所以被(bei)稱為氣(qi)(qi)(qi)門(men)挺(ting)(ting)(ting)(ting)桿(gan)(gan)。它的(de)(de)(de)(de)主(zhu)要(yao)(yao)功能是(shi)將凸(tu)輪(lun)(lun)(lun)的(de)(de)(de)(de)旋轉(zhuan)(zhuan)運(yun)(yun)動(dong)(dong)轉(zhuan)(zhuan)化為往復運(yun)(yun)動(dong)(dong)。但這種(zhong)(zhong)結構的(de)(de)(de)(de)發(fa)(fa)(fa)動(dong)(dong)機(ji)凸(tu)輪(lun)(lun)(lun)軸(zhou)一般不布置(zhi)在發(fa)(fa)(fa)動(dong)(dong)機(ji)頂部。隨著(zhu)現代(dai)(dai)汽車發(fa)(fa)(fa)動(dong)(dong)機(ji)技(ji)術的(de)(de)(de)(de)發(fa)(fa)(fa)展,越來越多的(de)(de)(de)(de)汽車發(fa)(fa)(fa)動(dong)(dong)機(ji)采用(yong)(yong)頂置(zhi)凸(tu)輪(lun)(lun)(lun)軸(zhou)結構,其中(zhong)傳統的(de)(de)(de)(de)長(chang)氣(qi)(qi)(qi)門(men)挺(ting)(ting)(ting)(ting)柱(zhu)基本取消,取而(er)代(dai)(dai)之的(de)(de)(de)(de)是(shi)由(you)凸(tu)輪(lun)(lun)(lun)軸(zhou)驅(qu)動(dong)(dong)的(de)(de)(de)(de)更加緊湊的(de)(de)(de)(de)液壓挺(ting)(ting)(ting)(ting)柱(zhu),或(huo)者凸(tu)輪(lun)(lun)(lun)軸(zhou)直接驅(qu)動(dong)(dong)氣(qi)(qi)(qi)門(men)搖臂來控制氣(qi)(qi)(qi)門(men)的(de)(de)(de)(de)開閉。液壓杠(gang)桿(gan)(gan)主(zhu)要(yao)(yao)由(you)柱(zhu)塞、單向(xiang)(xiang)閥和(he)單向(xiang)(xiang)閥彈簧組(zu)成。液壓桿(gan)(gan)始終(zhong)與(yu)凸(tu)輪(lun)(lun)(lun)軸(zhou)接觸,并且無間隙(xi)運(yun)(yun)行。在挺(ting)(ting)(ting)(ting)桿(gan)(gan)內部,液壓用(yong)(yong)于調整(zheng)間隙(xi)。液壓挺(ting)(ting)(ting)(ting)柱(zhu)主(zhu)要(yao)(yao)由(you)柱(zhu)塞、單向(xiang)(xiang)閥和(he)單向(xiang)(xiang)閥彈簧組(zu)成。止回閥用(yong)(yong)于儲存或(huo)釋放(fang)油。通過改變挺(ting)(ting)(ting)(ting)柱(zhu)腔內的(de)(de)(de)(de)油壓,可以改變液壓挺(ting)(ting)(ting)(ting)柱(zhu)的(de)(de)(de)(de)工作(zuo)長(chang)度,從而(er)自動(dong)(dong)調整(zheng)氣(qi)(qi)(qi)門(men)間隙(xi)。
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