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)車的(de)(de)(de)發(fa)(fa)(fa)動(dong)(dong)機(ji)相當于(yu)汽(qi)車的(de)(de)(de)心臟。發(fa)(fa)(fa)動(dong)(dong)機(ji)故障(zhang)也是困擾車友的(de)(de)(de)問(wen)題,氣(qi)(qi)(qi)門(men)(men)(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)是發(fa)(fa)(fa)動(dong)(dong)機(ji)的(de)(de)(de)重(zhong)要(yao)部(bu)件。接下(xia)來就讓(rang)典(dian)邦(bang)給大家(jia)介紹一下(xia)氣(qi)(qi)(qi)門(men)(men)(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)的(de)(de)(de)作用吧(ba)!氣(qi)(qi)(qi)門(men)(men)(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)的(de)(de)(de)功能(neng),氣(qi)(qi)(qi)門(men)(men)(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)簡介-功能(neng)也是用于(yu)推動(dong)(dong)氣(qi)(qi)(qi)門(men)(men)(men)(men)打開的(de)(de)(de)裝置。因為(wei)早期發(fa)(fa)(fa)動(dong)(dong)機(ji)中(zhong)使用的(de)(de)(de)這種(zhong)裝置形狀像一根細桿(gan)(gan),所以(yi)被稱(cheng)為(wei)氣(qi)(qi)(qi)門(men)(men)(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)。它的(de)(de)(de)主(zhu)要(yao)功能(neng)是將凸(tu)(tu)輪(lun)(lun)的(de)(de)(de)旋轉(zhuan)運(yun)動(dong)(dong)轉(zhuan)化(hua)為(wei)往復運(yun)動(dong)(dong)。但這種(zhong)結構(gou)的(de)(de)(de)發(fa)(fa)(fa)動(dong)(dong)機(ji)凸(tu)(tu)輪(lun)(lun)軸一般不布(bu)置在發(fa)(fa)(fa)動(dong)(dong)機(ji)頂(ding)部(bu)。隨著(zhu)現代汽(qi)車發(fa)(fa)(fa)動(dong)(dong)機(ji)技術的(de)(de)(de)發(fa)(fa)(fa)展(zhan),越來越多的(de)(de)(de)汽(qi)車發(fa)(fa)(fa)動(dong)(dong)機(ji)采用頂(ding)置凸(tu)(tu)輪(lun)(lun)軸結構(gou),其中(zhong)傳統的(de)(de)(de)長氣(qi)(qi)(qi)門(men)(men)(men)(men)挺(ting)(ting)(ting)柱基(ji)本取(qu)消,取(qu)而(er)代之的(de)(de)(de)是由(you)凸(tu)(tu)輪(lun)(lun)軸驅(qu)動(dong)(dong)的(de)(de)(de)更加緊(jin)湊(cou)的(de)(de)(de)液(ye)壓挺(ting)(ting)(ting)柱,或者凸(tu)(tu)輪(lun)(lun)軸直接驅(qu)動(dong)(dong)氣(qi)(qi)(qi)門(men)(men)(men)(men)搖(yao)臂來控(kong)制氣(qi)(qi)(qi)門(men)(men)(men)(men)的(de)(de)(de)開閉。液(ye)壓杠(gang)桿(gan)(gan)主(zhu)要(yao)由(you)柱塞、單(dan)向閥(fa)和單(dan)向閥(fa)彈簧組(zu)成(cheng)。液(ye)壓桿(gan)(gan)始(shi)終(zhong)與凸(tu)(tu)輪(lun)(lun)軸接觸,并且無間(jian)隙運(yun)行(xing)。在挺(ting)(ting)(ting)桿(gan)(gan)內(nei)部(bu),液(ye)壓用于(yu)調整間(jian)隙。液(ye)壓挺(ting)(ting)(ting)柱主(zhu)要(yao)由(you)柱塞、單(dan)向閥(fa)和單(dan)向閥(fa)彈簧組(zu)成(cheng)。止(zhi)回(hui)閥(fa)用于(yu)儲存或釋放油。通過改(gai)變挺(ting)(ting)(ting)柱腔(qiang)內(nei)的(de)(de)(de)油壓,可以(yi)改(gai)變液(ye)壓挺(ting)(ting)(ting)柱的(de)(de)(de)工作長度,從(cong)而(er)自動(dong)(dong)調整氣(qi)(qi)(qi)門(men)(men)(men)(men)間(jian)隙。
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