排氣歧管(guan),是與發動(dong)機氣缸體相(xiang)連(lian)的,將各缸的排氣集(ji)中起來導入排氣總管(guan),帶有分歧的管(guan)路。對它的要求主要是,盡量減(jian)少排氣阻力,并避免(mian)各缸之間相(xiang)互干(gan)擾。
排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)的作用(yong):排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)是(shi)連接(jie)每個(ge)氣(qi)(qi)(qi)缸的,最后排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)會匯集成一(yi)根(gen)管(guan)(guan)(guan)子,排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)可以(yi)讓(rang)汽缸內排(pai)(pai)(pai)出(chu)的廢(fei)氣(qi)(qi)(qi)進入排(pai)(pai)(pai)氣(qi)(qi)(qi)管(guan)(guan)(guan)。汽車(che)都(dou)是(shi)有(you)(you)排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)的,如(ru)果(guo)(guo)發(fa)動機有(you)(you)四個(ge)氣(qi)(qi)(qi)缸,就有(you)(you)四根(gen)排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan),如(ru)果(guo)(guo)發(fa)動機有(you)(you)八個(ge)氣(qi)(qi)(qi)缸,就有(you)(you)八個(ge)排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)。排(pai)(pai)(pai)氣(qi)(qi)(qi)歧管(guan)(guan)(guan)也被稱(cheng)為排(pai)(pai)(pai)氣(qi)(qi)(qi)頭(tou)段,發(fa)動機的排(pai)(pai)(pai)氣(qi)(qi)(qi)管(guan)(guan)(guan)是(shi)由三(san)段組成的,分別是(shi)頭(tou)段,中(zhong)段,尾(wei)段。中(zhong)段是(shi)在底盤上的,中(zhong)段是(shi)一(yi)根(gen)比較(jiao)長的管(guan)(guan)(guan)子。尾(wei)段是(shi)靠近后保險杠的部分,尾(wei)段上一(yi)般(ban)有(you)(you)一(yi)個(ge)比較(jiao)大的消音器。排(pai)(pai)(pai)氣(qi)(qi)(qi)管(guan)(guan)(guan)可以(yi)讓(rang)發(fa)動機做功產生的廢(fei)氣(qi)(qi)(qi)排(pai)(pai)(pai)到大氣(qi)(qi)(qi)中(zhong),并(bing)且可以(yi)降低排(pai)(pai)(pai)氣(qi)(qi)(qi)過程中(zhong)產生的噪音。
寶(bao)馬X3智能(neng)全輪(lun)(lun)驅(qu)動(dong)(dong)系統可(ke)以根(gen)據(ju)具(ju)(ju)體路(lu)況在各(ge)輪(lun)(lun)軸之(zhi)間(jian)(jian)靈活快速的分配(pei)驅(qu)動(dong)(dong)力(li)、寶(bao)馬也為新(xin)車(che)(che)型創造了(le)(le)、運(yun)(yun)動(dong)(dong)休閑(xian)車(che)(che)的概念(nian),你可(ke)以偶爾開著(zhu)它去郊外進行(xing)一(yi)些不(bu)太激烈(lie)的野外駕駛(shi),但是(shi)大多數時間(jian)(jian)它都會在市(shi)區里巡游。于是(shi),非承(cheng)載(zai)式(shi)車(che)(che)身、實心軸、非獨立(li)懸掛(gua)之(zhi)類的部件似乎變成了(le)(le)原始越(yue)野車(che)(che)上的遺物。保守的人認(ren)(ren)為這(zhe)是(shi)大逆不(bu)道,而大部分顧客則認(ren)(ren)為這(zhe)是(shi)對市(shi)場需求做出的正確反應(ying),應(ying)該令人高興,至少還保留著(zhu)越(yue)野車(che)(che)最(zui)可(ke)取的優點:魁梧結實的車(che)(che)身、寬敞的室內(nei)空(kong)間(jian)(jian)、座椅位置高和駕駛(shi)視野開闊(kuo)等、各(ge)操(cao)控部件清(qing)晰、準(zhun)確。駕駛(shi)操(cao)控很(hen)靈便,具(ju)(ju)備運(yun)(yun)動(dong)(dong)風格的駕駛(shi)性能(neng),轉向非常準(zhun)確,路(lu)感很(hen)清(qing)晰,在多彎路(lu)面行(xing)駛(shi)可(ke)以給駕駛(shi)者帶(dai)來更(geng)多的樂趣,讓(rang)你充滿(man)信心。經典的直列6缸發動(dong)(dong)機運(yun)(yun)轉平穩,動(dong)(dong)力(li)充沛,表現出寶(bao)馬的特色(se)。
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