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更換曲軸箱通風(feng)閥(fa)
1.曲(qu)軸(zhou)箱(xiang)(xiang)通風單(dan)向(xiang)閥(fa)安裝在氣門(men)蓋上，可以根據發動機的(de)(de)不同工(gong)況和進氣管(guan)真(zhen)空度的(de)(de)變化，自動控制曲(qu)軸(zhou)箱(xiang)(xiang)竄氣的(de)(de)再循環量。如果(guo)曲(qu)軸(zhou)箱(xiang)(xiang)單(dan)向(xiang)閥(fa)損壞，曲(qu)軸(zhou)箱(xiang)(xiang)內壓力會(hui)增加，機油(you)消耗過快(kuai)，廢氣也會(hui)受(shou)到影響。
曲軸通(tong)風(feng)閥的作用：
1。發動(dong)機工作時，進氣(qi)(qi)(qi)(qi)管真(zhen)空通過(guo)空氣(qi)(qi)(qi)(qi)濾清器吸入(ru)新鮮(xian)空氣(qi)(qi)(qi)(qi)，空氣(qi)(qi)(qi)(qi)軟管進入(ru)氣(qi)(qi)(qi)(qi)缸蓋罩，再通過(guo)氣(qi)(qi)(qi)(qi)缸蓋和機體上(shang)的孔(kong)進入(ru)曲軸箱；
2.曲(qu)(qu)軸箱(xiang)內的新鮮空氣(qi)(qi)(qi)與曲(qu)(qu)軸箱(xiang)氣(qi)(qi)(qi)體混合，通過氣(qi)(qi)(qi)缸蓋罩(zhao)、PCV閥、曲(qu)(qu)軸箱(xiang)氣(qi)(qi)(qi)體軟管(guan)進入進氣(qi)(qi)(qi)管(guan)，最后通過進氣(qi)(qi)(qi)門進入燃燒室燃燒；
3.根據發動機的不(bu)同(tong)工況，PCV閥的開(kai)度不(bu)同(tong)，通(tong)過它的空氣量也(ye)不(bu)同(tong)，從而實現曲軸箱通(tong)風(feng)控(kong)制。
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