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)發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)相(xiang)當于汽車(che)的(de)心(xin)臟。發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)故障(zhang)也是(shi)困(kun)擾車(che)友的(de)問題,氣(qi)(qi)門(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)是(shi)發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)的(de)重要(yao)部件(jian)。接(jie)下來就讓典(dian)邦給大家介(jie)(jie)紹一下氣(qi)(qi)門(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)的(de)作用(yong)吧!氣(qi)(qi)門(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)的(de)功(gong)能,氣(qi)(qi)門(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)簡介(jie)(jie)-功(gong)能也是(shi)用(yong)于推動(dong)(dong)(dong)氣(qi)(qi)門(men)(men)打(da)開的(de)裝(zhuang)置(zhi)(zhi)。因為(wei)早(zao)期發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)中使(shi)用(yong)的(de)這種(zhong)裝(zhuang)置(zhi)(zhi)形狀像一根細(xi)桿(gan)(gan),所以(yi)被稱為(wei)氣(qi)(qi)門(men)(men)挺(ting)(ting)(ting)桿(gan)(gan)。它的(de)主(zhu)要(yao)功(gong)能是(shi)將凸(tu)(tu)輪(lun)(lun)的(de)旋轉運(yun)(yun)動(dong)(dong)(dong)轉化為(wei)往復運(yun)(yun)動(dong)(dong)(dong)。但這種(zhong)結構的(de)發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)一般不布置(zhi)(zhi)在發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)頂(ding)部。隨著現代汽車(che)發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)技術的(de)發(fa)(fa)(fa)(fa)展,越來越多的(de)汽車(che)發(fa)(fa)(fa)(fa)動(dong)(dong)(dong)機(ji)采用(yong)頂(ding)置(zhi)(zhi)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)結構,其中傳(chuan)統的(de)長氣(qi)(qi)門(men)(men)挺(ting)(ting)(ting)柱(zhu)(zhu)(zhu)(zhu)基本取(qu)消,取(qu)而(er)代之(zhi)的(de)是(shi)由(you)(you)凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)驅動(dong)(dong)(dong)的(de)更加(jia)緊(jin)湊的(de)液(ye)壓(ya)(ya)挺(ting)(ting)(ting)柱(zhu)(zhu)(zhu)(zhu),或(huo)者凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)直(zhi)接(jie)驅動(dong)(dong)(dong)氣(qi)(qi)門(men)(men)搖臂(bei)來控制氣(qi)(qi)門(men)(men)的(de)開閉。液(ye)壓(ya)(ya)杠桿(gan)(gan)主(zhu)要(yao)由(you)(you)柱(zhu)(zhu)(zhu)(zhu)塞(sai)、單(dan)(dan)向(xiang)閥(fa)(fa)和單(dan)(dan)向(xiang)閥(fa)(fa)彈(dan)簧(huang)(huang)組(zu)成。液(ye)壓(ya)(ya)桿(gan)(gan)始終(zhong)與凸(tu)(tu)輪(lun)(lun)軸(zhou)(zhou)接(jie)觸(chu),并(bing)且(qie)無間隙運(yun)(yun)行。在挺(ting)(ting)(ting)桿(gan)(gan)內(nei)部,液(ye)壓(ya)(ya)用(yong)于調(diao)整間隙。液(ye)壓(ya)(ya)挺(ting)(ting)(ting)柱(zhu)(zhu)(zhu)(zhu)主(zhu)要(yao)由(you)(you)柱(zhu)(zhu)(zhu)(zhu)塞(sai)、單(dan)(dan)向(xiang)閥(fa)(fa)和單(dan)(dan)向(xiang)閥(fa)(fa)彈(dan)簧(huang)(huang)組(zu)成。止回閥(fa)(fa)用(yong)于儲存或(huo)釋(shi)放油(you)。通過改變挺(ting)(ting)(ting)柱(zhu)(zhu)(zhu)(zhu)腔內(nei)的(de)油(you)壓(ya)(ya),可以(yi)改變液(ye)壓(ya)(ya)挺(ting)(ting)(ting)柱(zhu)(zhu)(zhu)(zhu)的(de)工作長度,從而(er)自動(dong)(dong)(dong)調(diao)整氣(qi)(qi)門(men)(men)間隙。
MINI Countryman是(shi)MINI首款SUV車型(xing)(xing)。在車身線(xian)條上(shang)保留(liu)了MINI原(yuan)(yuan)汁原(yuan)(yuan)味的(de)家族氣息。內飾方(fang)面(mian),中置(zhi)儀表(biao)(biao)和(he)獨立(li)轉速表(biao)(biao)并(bing)沒有發生變化,中控(kong)臺酷似米(mi)老鼠的(de)頭像設計新穎(ying)。而(er)車門(men)面(mian)板上(shang),圍繞臂(bei)托(tuo)和(he)關門(men)手(shou)柄(bing)的(de)橢圓框(kuang)架(jia)也(ye)是(shi)MINI的(de)典型(xing)(xing)特(te)征。四(si)人獨立(li)座椅(yi)也(ye)是(shi)Countryman最大的(de)創(chuang)新,后座靠背可完全放倒,使行李箱(xiang)空間從350升增加(jia)至440升,空間擴展方(fang)面(mian)表(biao)(biao)現突出。Countryman搭(da)載的(de)是(shi)一(yi)臺1.6T四(si)缸發動機,與之匹配的(de)是(shi)一(yi)臺6速手(shou)自一(yi)體變速箱(xiang),并(bing)配備(bei)換擋撥片,凸顯駕駛(shi)樂趣(qu)。
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