Mfundo yogwirira ntchito ya compressor yopanda mafuta yopanda mpweya: compressor yopanda mafuta yopanda pake ndi kapuni kakang'ono ka piston.Pamene shaft imodzi ya injini imayendetsa makina a compressor crankshaft kuti azungulire, imadzipaka yokha popanda kuwonjezera mafuta aliwonse kudzera panjira yolumikizira.Pistoni imabwereranso.Voliyumu yogwira ntchito yopangidwa ndi khoma lamkati la silinda, mutu wa silinda ndi pamwamba pa pisitoni zidzasintha nthawi ndi nthawi.

Pistoni ya pisitoni kompresa ikayamba kusuntha kuchokera pamutu wa silinda, voliyumu yogwira ntchito mu silinda imawonjezeka pang'onopang'ono → mpweya uli m'mphepete mwa chitoliro, ndikukankhira valavu yolowera mu silinda, mpaka voliyumu yogwira ntchito ikafika pamlingo waukulu, kuchuluka kwake. Vavu ya mpweya yotsekedwa → Pistoni ya pisitoni kompresa imayenda molowera chakumbuyo, voliyumu yogwira ntchito mu silinda imachepa ndipo mphamvu ya mpweya imawonjezeka.Pamene kupsyinjika kwa silinda kumafika ndipo kumakhala kokwera pang'ono kusiyana ndi kuthamanga kwa mpweya, valavu yotulutsa mpweya imatsegula ndipo mpweya umatuluka mu silinda mpaka pisitoni Kutsekedwa kwa valve kutsekedwa mpaka kukafika malire.Pamene pisitoni ya pisitoni kompresa imayendanso molowera chakumbuyo, njira yomwe ili pamwambapa imadzibwereza yokha.

Ndiko kuti, crankshaft ya pisitoni kompresa amazungulira kamodzi, pisitoni kubweza kamodzi, ndi kudya, kuponderezana, ndi utsi njira amazindikira motsatana mu yamphamvu, ndiko kuti, kuzungulira ntchito kwatha.Mapangidwe a single-shaft double-cylinder structure amapangitsa kuti mpweya wa compressor uziyenda mowirikiza kawiri kuposa silinda imodzi pomwe liwiro loyezedwa likhazikika, ndipo limayendetsedwa bwino pakugwedezeka ndi kuwongolera phokoso.