狼群视频在线

進氣門座圈簡介

進氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)閥座(zuo)(zuo)環功能(neng)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)的主(zhu)要作(zuo)用(yong)(yong)(yong)(yong)是(shi)(shi)承受高(gao)速(su)沖(chong)擊，密封(feng)(feng)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)。發(fa)(fa)動(dong)機(ji)(ji)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)用(yong)(yong)(yong)(yong)于延(yan)長發(fa)(fa)動(dong)機(ji)(ji)的使用(yong)(yong)(yong)(yong)壽命(ming)(ming)，便于維護和更(geng)(geng)換。氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)的缺點是(shi)(shi)導熱(re)性(xing)差，選擇合適的與(yu)缸膛過盈量(liang)，否(fou)則工(gong)作(zuo)時座(zuo)(zuo)圈(quan)(quan)(quan)會脫落(luo)，造成(cheng)(cheng)發(fa)(fa)動(dong)機(ji)(ji)維修(xiu)(xiu)事(shi)故！氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)一(yi)般由耐熱(re)合金鋼制成(cheng)(cheng)。汽車(che)(che)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)是(shi)(shi)汽車(che)(che)發(fa)(fa)動(dong)機(ji)(ji)的重要附件，主(zhu)要用(yong)(yong)(yong)(yong)來密封(feng)(feng)發(fa)(fa)動(dong)機(ji)(ji)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)，基本(ben)上(shang)是(shi)(shi)一(yi)個時刻(ke)承受高(gao)速(su)沖(chong)擊的部件。因此，汽車(che)(che)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)在使用(yong)(yong)(yong)(yong)一(yi)段時間后(hou)，容(rong)易(yi)出現不同程度的磨損失效，經常面臨維修(xiu)(xiu)。修(xiu)(xiu)理氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)時，應根(gen)據(ju)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)的不同磨損情況選擇不同的修(xiu)(xiu)理方(fang)法(fa)，以降(jiang)低(di)發(fa)(fa)動(dong)機(ji)(ji)的維修(xiu)(xiu)成(cheng)(cheng)本(ben)。一(yi)般來說，氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)座(zuo)(zuo)圈(quan)(quan)(quan)的作(zuo)用(yong)(yong)(yong)(yong)是(shi)(shi)提高(gao)發(fa)(fa)動(dong)機(ji)(ji)的使用(yong)(yong)(yong)(yong)壽命(ming)(ming)，承受高(gao)速(su)沖(chong)擊，方(fang)便發(fa)(fa)動(dong)機(ji)(ji)維修(xiu)(xiu)和更(geng)(geng)換，密封(feng)(feng)發(fa)(fa)動(dong)機(ji)(ji)氣(qi)(qi)(qi)(qi)(qi)門(men)(men)(men)。

氣門的原理

1、氣門（Valve）的作用是專門負責向發動機內輸入燃料并排出廢氣，傳統發動機每個汽缸只有一個進氣門和一個排氣門，這種設計結構相對簡單，成本較低，維修方便，低速性能較好，缺點是功率很難提高，尤其是高轉速時充氣效率低、性能較弱。
2、為了提高進排氣效率，現在多采用多氣門技術，常見的是每個汽缸布置有4個氣門（也有單缸3或5個氣門的設計，原理一樣，如奧迪A6的發動機），4汽缸一共就是16個氣門，我們在汽車資料上經常看到的“16V”就表示發動機共16個氣門。這種多氣門結構容易形成緊湊型燃燒室，噴油器布置在中央，這樣可以令油氣混合氣燃燒更迅速、更均勻，各氣門的重量和開度適當地減小，使氣門開啟或閉合的速度更快。

紅旗H7簡介

紅(hong)(hong)(hong)旗H7是(shi)一(yi)汽(qi)集團紅(hong)(hong)(hong)旗復興規劃(hua)中(zhong)首款面向市場的車型。紅(hong)(hong)(hong)旗h7紅(hong)(hong)(hong)旗轎(jiao)車從一(yi)誕生就成為我國高級領導配(pei)備(bei)用車，可(ke)以(yi)說(shuo)是(shi)風靡一(yi)時。到(dao)奧迪(di)A6進入(ru)中(zhong)國后，紅(hong)(hong)(hong)旗的地位才被(bei)奧迪(di)取代。