渦輪增(zeng)(zeng)壓(ya)器(qi)實際上是一種空(kong)(kong)(kong)氣(qi)(qi)壓(ya)縮機，通過壓(ya)縮空(kong)(kong)(kong)氣(qi)(qi)來(lai)增(zeng)(zeng)加進(jin)氣(qi)(qi)量。它是利用(yong)發動(dong)(dong)(dong)機排出(chu)的(de)廢氣(qi)(qi)慣性(xing)沖力來(lai)推(tui)動(dong)(dong)(dong)渦輪室內(nei)的(de)渦輪，渦輪又帶動(dong)(dong)(dong)同(tong)軸(zhou)的(de)葉輪，葉輪壓(ya)送由空(kong)(kong)(kong)氣(qi)(qi)濾清器(qi)管道送來(lai)的(de)空(kong)(kong)(kong)氣(qi)(qi)，使(shi)之增(zeng)(zeng)壓(ya)進(jin)入(ru)氣(qi)(qi)缸。當發動(dong)(dong)(dong)機轉(zhuan)速(su)增(zeng)(zeng)大，廢氣(qi)(qi)排出(chu)速(su)度與渦輪轉(zhuan)速(su)也同(tong)步(bu)增(zeng)(zeng)加，葉輪就壓(ya)縮更多的(de)空(kong)(kong)(kong)氣(qi)(qi)進(jin)入(ru)氣(qi)(qi)缸，空(kong)(kong)(kong)氣(qi)(qi)的(de)壓(ya)力和密(mi)度增(zeng)(zeng)大可以燃燒更多的(de)燃料，相應增(zeng)(zeng)加燃料量和調整發動(dong)(dong)(dong)機的(de)轉(zhuan)速(su)，就可以增(zeng)(zeng)加發動(dong)(dong)(dong)機的(de)輸出(chu)功率了(le)。