排(pai)氣(qi)歧(qi)管,是與(yu)發動機(ji)氣(qi)缸(gang)體相連的(de),將各(ge)(ge)缸(gang)的(de)排(pai)氣(qi)集(ji)中起來導入(ru)排(pai)氣(qi)總管,帶(dai)有分歧(qi)的(de)管路。對它的(de)要求主要是,盡量減少排(pai)氣(qi)阻力,并避(bi)免各(ge)(ge)缸(gang)之間相互干擾(rao)。
排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)的(de)作用:排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)是(shi)(shi)(shi)連接(jie)每個(ge)(ge)氣(qi)(qi)(qi)(qi)(qi)(qi)缸的(de),最后排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)會匯集成(cheng)一(yi)根管(guan)(guan)(guan)子,排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)可(ke)以讓(rang)汽缸內(nei)排(pai)(pai)出的(de)廢(fei)氣(qi)(qi)(qi)(qi)(qi)(qi)進入排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)管(guan)(guan)(guan)。汽車都(dou)是(shi)(shi)(shi)有(you)排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)的(de),如果發(fa)動(dong)(dong)機有(you)四個(ge)(ge)氣(qi)(qi)(qi)(qi)(qi)(qi)缸,就(jiu)有(you)四根排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan),如果發(fa)動(dong)(dong)機有(you)八個(ge)(ge)氣(qi)(qi)(qi)(qi)(qi)(qi)缸,就(jiu)有(you)八個(ge)(ge)排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)。排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)歧(qi)管(guan)(guan)(guan)也被(bei)稱為(wei)排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)頭段(duan),發(fa)動(dong)(dong)機的(de)排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)管(guan)(guan)(guan)是(shi)(shi)(shi)由三段(duan)組(zu)成(cheng)的(de),分別(bie)是(shi)(shi)(shi)頭段(duan),中(zhong)(zhong)段(duan),尾段(duan)。中(zhong)(zhong)段(duan)是(shi)(shi)(shi)在底盤上的(de),中(zhong)(zhong)段(duan)是(shi)(shi)(shi)一(yi)根比(bi)較長的(de)管(guan)(guan)(guan)子。尾段(duan)是(shi)(shi)(shi)靠近后保(bao)險(xian)杠的(de)部分,尾段(duan)上一(yi)般有(you)一(yi)個(ge)(ge)比(bi)較大的(de)消音器。排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)管(guan)(guan)(guan)可(ke)以讓(rang)發(fa)動(dong)(dong)機做功(gong)產(chan)生的(de)廢(fei)氣(qi)(qi)(qi)(qi)(qi)(qi)排(pai)(pai)到大氣(qi)(qi)(qi)(qi)(qi)(qi)中(zhong)(zhong),并(bing)且可(ke)以降低排(pai)(pai)氣(qi)(qi)(qi)(qi)(qi)(qi)過(guo)程中(zhong)(zhong)產(chan)生的(de)噪(zao)音。
風(feng)雅(ya)的外形(xing)看起(qi)來與天籟很相象,特別是(shi)從(cong)側面的角度(du)看過去,像極了一對孿(luan)生兄弟,但是(shi)風(feng)雅(ya)的車頭大燈(deng)保險(xian)杠部位要(yao)比(bi)天籟顯(xian)得(de)圓滑,線條比(bi)較流暢(chang),組以及霧燈(deng)整(zheng)合在一起(qi)﹐配合大型(xing)橫柵式鍍鉻水箱罩與nissan廠徽使整(zheng)個車頭呈現一種前衛風(feng)格。
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