排(pai)氣歧管,是與發動(dong)機氣缸(gang)體相連的(de)(de),將各缸(gang)的(de)(de)排(pai)氣集中(zhong)起來(lai)導入排(pai)氣總管,帶有分歧的(de)(de)管路(lu)。對它的(de)(de)要求(qiu)主要是,盡量減少排(pai)氣阻力(li),并避免(mian)各缸(gang)之間(jian)相互干擾。
排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)作(zuo)用:排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)(shi)連接每個(ge)氣(qi)(qi)(qi)(qi)(qi)缸(gang)的(de)(de)(de)(de),最后(hou)(hou)排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)會匯集成一根(gen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)子,排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)讓汽缸(gang)內(nei)排(pai)出的(de)(de)(de)(de)廢氣(qi)(qi)(qi)(qi)(qi)進入排(pai)氣(qi)(qi)(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。汽車都是(shi)(shi)有(you)排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de),如果發(fa)動機(ji)有(you)四(si)個(ge)氣(qi)(qi)(qi)(qi)(qi)缸(gang),就有(you)四(si)根(gen)排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan),如果發(fa)動機(ji)有(you)八個(ge)氣(qi)(qi)(qi)(qi)(qi)缸(gang),就有(you)八個(ge)排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。排(pai)氣(qi)(qi)(qi)(qi)(qi)歧(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)也(ye)被稱為(wei)排(pai)氣(qi)(qi)(qi)(qi)(qi)頭段(duan)(duan)(duan)(duan),發(fa)動機(ji)的(de)(de)(de)(de)排(pai)氣(qi)(qi)(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)(shi)由三段(duan)(duan)(duan)(duan)組成的(de)(de)(de)(de),分別是(shi)(shi)頭段(duan)(duan)(duan)(duan),中(zhong)段(duan)(duan)(duan)(duan),尾段(duan)(duan)(duan)(duan)。中(zhong)段(duan)(duan)(duan)(duan)是(shi)(shi)在底盤上(shang)的(de)(de)(de)(de),中(zhong)段(duan)(duan)(duan)(duan)是(shi)(shi)一根(gen)比較長(chang)的(de)(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)子。尾段(duan)(duan)(duan)(duan)是(shi)(shi)靠近后(hou)(hou)保險杠(gang)的(de)(de)(de)(de)部分,尾段(duan)(duan)(duan)(duan)上(shang)一般有(you)一個(ge)比較大的(de)(de)(de)(de)消音器。排(pai)氣(qi)(qi)(qi)(qi)(qi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)讓發(fa)動機(ji)做功產生的(de)(de)(de)(de)廢氣(qi)(qi)(qi)(qi)(qi)排(pai)到大氣(qi)(qi)(qi)(qi)(qi)中(zhong),并且可以(yi)(yi)降低排(pai)氣(qi)(qi)(qi)(qi)(qi)過程中(zhong)產生的(de)(de)(de)(de)噪音。
外(wai)觀方面,捷(jie)途X70S在整體造型方面與(yu)捷(jie)途X70基本保持一致,主要變化在于新車的前進(jin)氣格柵(zha)采(cai)用了(le)蜂窩(wo)網狀(zhuang)設計,并針(zhen)對其(qi)內網進(jin)行了(le)熏黑處理
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