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)車(che)的(de)(de)(de)(de)(de)(de)發(fa)動(dong)(dong)(dong)(dong)機相當于汽(qi)車(che)的(de)(de)(de)(de)(de)(de)心(xin)臟。發(fa)動(dong)(dong)(dong)(dong)機故障(zhang)也(ye)是(shi)困擾車(che)友(you)的(de)(de)(de)(de)(de)(de)問題,氣(qi)(qi)(qi)門(men)(men)(men)挺(ting)(ting)(ting)(ting)桿(gan)是(shi)發(fa)動(dong)(dong)(dong)(dong)機的(de)(de)(de)(de)(de)(de)重要(yao)部件。接下(xia)來(lai)就讓(rang)典邦給大家介(jie)紹(shao)一(yi)下(xia)氣(qi)(qi)(qi)門(men)(men)(men)挺(ting)(ting)(ting)(ting)桿(gan)的(de)(de)(de)(de)(de)(de)作用(yong)吧!氣(qi)(qi)(qi)門(men)(men)(men)挺(ting)(ting)(ting)(ting)桿(gan)的(de)(de)(de)(de)(de)(de)功能(neng),氣(qi)(qi)(qi)門(men)(men)(men)挺(ting)(ting)(ting)(ting)桿(gan)簡介(jie)-功能(neng)也(ye)是(shi)用(yong)于推動(dong)(dong)(dong)(dong)氣(qi)(qi)(qi)門(men)(men)(men)打開(kai)的(de)(de)(de)(de)(de)(de)裝(zhuang)置。因為(wei)早期發(fa)動(dong)(dong)(dong)(dong)機中使用(yong)的(de)(de)(de)(de)(de)(de)這(zhe)種裝(zhuang)置形狀像一(yi)根細桿(gan),所以(yi)被(bei)稱為(wei)氣(qi)(qi)(qi)門(men)(men)(men)挺(ting)(ting)(ting)(ting)桿(gan)。它的(de)(de)(de)(de)(de)(de)主要(yao)功能(neng)是(shi)將凸(tu)(tu)輪(lun)(lun)的(de)(de)(de)(de)(de)(de)旋轉(zhuan)運(yun)動(dong)(dong)(dong)(dong)轉(zhuan)化為(wei)往復運(yun)動(dong)(dong)(dong)(dong)。但(dan)這(zhe)種結構的(de)(de)(de)(de)(de)(de)發(fa)動(dong)(dong)(dong)(dong)機凸(tu)(tu)輪(lun)(lun)軸一(yi)般不布置在(zai)發(fa)動(dong)(dong)(dong)(dong)機頂(ding)部。隨著現代(dai)汽(qi)車(che)發(fa)動(dong)(dong)(dong)(dong)機技術的(de)(de)(de)(de)(de)(de)發(fa)展,越(yue)(yue)來(lai)越(yue)(yue)多的(de)(de)(de)(de)(de)(de)汽(qi)車(che)發(fa)動(dong)(dong)(dong)(dong)機采用(yong)頂(ding)置凸(tu)(tu)輪(lun)(lun)軸結構,其中傳(chuan)統的(de)(de)(de)(de)(de)(de)長(chang)氣(qi)(qi)(qi)門(men)(men)(men)挺(ting)(ting)(ting)(ting)柱(zhu)基本取(qu)消,取(qu)而代(dai)之的(de)(de)(de)(de)(de)(de)是(shi)由凸(tu)(tu)輪(lun)(lun)軸驅動(dong)(dong)(dong)(dong)的(de)(de)(de)(de)(de)(de)更加(jia)緊湊(cou)的(de)(de)(de)(de)(de)(de)液(ye)壓(ya)(ya)挺(ting)(ting)(ting)(ting)柱(zhu),或(huo)者凸(tu)(tu)輪(lun)(lun)軸直(zhi)接驅動(dong)(dong)(dong)(dong)氣(qi)(qi)(qi)門(men)(men)(men)搖臂(bei)來(lai)控制氣(qi)(qi)(qi)門(men)(men)(men)的(de)(de)(de)(de)(de)(de)開(kai)閉(bi)。液(ye)壓(ya)(ya)杠桿(gan)主要(yao)由柱(zhu)塞、單(dan)向(xiang)閥(fa)(fa)和單(dan)向(xiang)閥(fa)(fa)彈簧組成。液(ye)壓(ya)(ya)桿(gan)始(shi)終與凸(tu)(tu)輪(lun)(lun)軸接觸,并且無間(jian)隙(xi)運(yun)行。在(zai)挺(ting)(ting)(ting)(ting)桿(gan)內(nei)部,液(ye)壓(ya)(ya)用(yong)于調(diao)整間(jian)隙(xi)。液(ye)壓(ya)(ya)挺(ting)(ting)(ting)(ting)柱(zhu)主要(yao)由柱(zhu)塞、單(dan)向(xiang)閥(fa)(fa)和單(dan)向(xiang)閥(fa)(fa)彈簧組成。止回閥(fa)(fa)用(yong)于儲存或(huo)釋放油。通過(guo)改(gai)變挺(ting)(ting)(ting)(ting)柱(zhu)腔內(nei)的(de)(de)(de)(de)(de)(de)油壓(ya)(ya),可以(yi)改(gai)變液(ye)壓(ya)(ya)挺(ting)(ting)(ting)(ting)柱(zhu)的(de)(de)(de)(de)(de)(de)工作長(chang)度,從(cong)而自動(dong)(dong)(dong)(dong)調(diao)整氣(qi)(qi)(qi)門(men)(men)(men)間(jian)隙(xi)。
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