渦(wo)輪增壓(ya)(ya)器(qi)實(shi)際上(shang)是一種空(kong)氣(qi)(qi)(qi)壓(ya)(ya)縮(suo)機(ji)，通(tong)過壓(ya)(ya)縮(suo)空(kong)氣(qi)(qi)(qi)來(lai)增加進(jin)氣(qi)(qi)(qi)量。它是利用發動(dong)(dong)(dong)機(ji)排出的(de)廢氣(qi)(qi)(qi)慣性沖力來(lai)推動(dong)(dong)(dong)渦(wo)輪室(shi)內的(de)渦(wo)輪，渦(wo)輪又帶(dai)動(dong)(dong)(dong)同軸的(de)葉輪，葉輪壓(ya)(ya)送由空(kong)氣(qi)(qi)(qi)濾清(qing)器(qi)管(guan)道送來(lai)的(de)空(kong)氣(qi)(qi)(qi)，使之增壓(ya)(ya)進(jin)入氣(qi)(qi)(qi)缸。當發動(dong)(dong)(dong)機(ji)轉速增大(da)，廢氣(qi)(qi)(qi)排出速度(du)(du)與(yu)渦(wo)輪轉速也同步增加，葉輪就(jiu)壓(ya)(ya)縮(suo)更多的(de)空(kong)氣(qi)(qi)(qi)進(jin)入氣(qi)(qi)(qi)缸，空(kong)氣(qi)(qi)(qi)的(de)壓(ya)(ya)力和(he)(he)密度(du)(du)增大(da)可以燃(ran)燒更多的(de)燃(ran)料(liao)，相應增加燃(ran)料(liao)量和(he)(he)調整發動(dong)(dong)(dong)機(ji)的(de)轉速，就(jiu)可以增加發動(dong)(dong)(dong)機(ji)的(de)輸出功(gong)率了(le)。