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銅滑板
1、按活塞(sai)頂部的(de)結(jie)構形式分類(lei)
①平頂(ding)活(huo)塞:適用于(yu)化油器式發動機(ji)(ji)的預(yu)燃(ran)式燃(ran)燒(shao)室(shi)(shi)及柴油機(ji)(ji)的渦流式燃(ran)燒(shao)室(shi)(shi)。其優點是容(rong)易制造(zao),頂(ding)部承受熱分配均勻,活(huo)塞質量小。
②凹頂活塞:可改善混合(he)氣流動(dong)性能(neng)和(he)燃燒性能(neng),適用于柴油機或部(bu)分汽油機。其優點是容(rong)易變更(geng)壓縮比和(he)燃燒室形(xing)狀。
③凸頂(ding)活(huo)塞(sai):銅滑板為了提高(gao)壓縮比,一般適用(yong)于小功率發動機。
2、按裙部的結構分類
①裙部開槽(cao)活(huo)塞(sai):適用(yong)于氣缸直徑較(jiao)小(xiao)、氣體壓力較(jiao)低的(de)發動(dong)機。開槽(cao)的(de)目(mu)的(de)是(shi)避免膨脹,也稱彈性活(huo)塞(sai)。
②裙部(bu)不(bu)開槽(cao)的活塞:多用于大噸位(wei)載貨(huo)汽車(che)的發動機(ji)。也稱剛性(xing)活塞。
3、按活塞銷座分類
①活(huo)塞銷座軸(zhou)線與活(huo)塞軸(zhou)線垂直相交的(de)活(huo)塞。
②活(huo)(huo)(huo)塞銷座軸線(xian)與活(huo)(huo)(huo)塞軸線(xian)垂直(zhi)但不相交的活(huo)(huo)(huo)塞。