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(che)的(de)(de)(de)(de)發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)相當于汽車(che)的(de)(de)(de)(de)心臟。發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)故障也是(shi)(shi)困擾車(che)友的(de)(de)(de)(de)問題,氣(qi)(qi)(qi)(qi)(qi)門(men)挺(ting)(ting)桿(gan)(gan)(gan)是(shi)(shi)發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)的(de)(de)(de)(de)重要(yao)部件(jian)。接下來就讓(rang)典邦(bang)給大(da)家介紹一下氣(qi)(qi)(qi)(qi)(qi)門(men)挺(ting)(ting)桿(gan)(gan)(gan)的(de)(de)(de)(de)作(zuo)用(yong)吧!氣(qi)(qi)(qi)(qi)(qi)門(men)挺(ting)(ting)桿(gan)(gan)(gan)的(de)(de)(de)(de)功(gong)能(neng)(neng),氣(qi)(qi)(qi)(qi)(qi)門(men)挺(ting)(ting)桿(gan)(gan)(gan)簡介-功(gong)能(neng)(neng)也是(shi)(shi)用(yong)于推動(dong)(dong)(dong)(dong)(dong)氣(qi)(qi)(qi)(qi)(qi)門(men)打(da)開的(de)(de)(de)(de)裝置(zhi)。因為(wei)早(zao)期發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)中使用(yong)的(de)(de)(de)(de)這種(zhong)裝置(zhi)形狀像一根細桿(gan)(gan)(gan),所以被稱(cheng)為(wei)氣(qi)(qi)(qi)(qi)(qi)門(men)挺(ting)(ting)桿(gan)(gan)(gan)。它的(de)(de)(de)(de)主(zhu)要(yao)功(gong)能(neng)(neng)是(shi)(shi)將凸(tu)輪的(de)(de)(de)(de)旋轉運(yun)動(dong)(dong)(dong)(dong)(dong)轉化為(wei)往復運(yun)動(dong)(dong)(dong)(dong)(dong)。但(dan)這種(zhong)結構(gou)的(de)(de)(de)(de)發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)凸(tu)輪軸一般不布置(zhi)在發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)頂(ding)(ding)部。隨著現代(dai)汽車(che)發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)技術(shu)的(de)(de)(de)(de)發(fa)(fa)(fa)(fa)(fa)展,越來越多的(de)(de)(de)(de)汽車(che)發(fa)(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)(dong)機(ji)采(cai)用(yong)頂(ding)(ding)置(zhi)凸(tu)輪軸結構(gou),其中傳統的(de)(de)(de)(de)長氣(qi)(qi)(qi)(qi)(qi)門(men)挺(ting)(ting)柱(zhu)基本取消,取而代(dai)之的(de)(de)(de)(de)是(shi)(shi)由(you)凸(tu)輪軸驅(qu)動(dong)(dong)(dong)(dong)(dong)的(de)(de)(de)(de)更加緊湊的(de)(de)(de)(de)液壓(ya)挺(ting)(ting)柱(zhu),或者(zhe)凸(tu)輪軸直接驅(qu)動(dong)(dong)(dong)(dong)(dong)氣(qi)(qi)(qi)(qi)(qi)門(men)搖臂來控制氣(qi)(qi)(qi)(qi)(qi)門(men)的(de)(de)(de)(de)開閉。液壓(ya)杠桿(gan)(gan)(gan)主(zhu)要(yao)由(you)柱(zhu)塞、單(dan)(dan)向(xiang)(xiang)閥(fa)和單(dan)(dan)向(xiang)(xiang)閥(fa)彈簧(huang)組成(cheng)。液壓(ya)桿(gan)(gan)(gan)始終與凸(tu)輪軸接觸,并(bing)且無間隙運(yun)行。在挺(ting)(ting)桿(gan)(gan)(gan)內部,液壓(ya)用(yong)于調整間隙。液壓(ya)挺(ting)(ting)柱(zhu)主(zhu)要(yao)由(you)柱(zhu)塞、單(dan)(dan)向(xiang)(xiang)閥(fa)和單(dan)(dan)向(xiang)(xiang)閥(fa)彈簧(huang)組成(cheng)。止回閥(fa)用(yong)于儲存或釋放油。通過(guo)改變挺(ting)(ting)柱(zhu)腔內的(de)(de)(de)(de)油壓(ya),可以改變液壓(ya)挺(ting)(ting)柱(zhu)的(de)(de)(de)(de)工作(zuo)長度,從而自動(dong)(dong)(dong)(dong)(dong)調整氣(qi)(qi)(qi)(qi)(qi)門(men)間隙。
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