Ntchito mfundo kompresa wopanda mafuta: mafuta-free kompresa ndi yaying'ono reciprocating pisitoni kompresa. Pamene shaft yamagalimoto imodzi imayendetsa crankhaft ya kompresa kuti izizungulira, kudzera pakupatsira kwa ndodo yolumikizira, pisitoni yokhala ndi kondomu popanda kuwonjezera mafuta aliwonse adzapangitsanso kuyenda, ndipo voliyumu yogwira yopangidwa ndi silinda wamkati wamkati, mutu wamphamvu ndi pisitoni pamwamba pake kusintha nthawi ndi nthawi. Pisitoni ya compressor ya pistoni ikayamba kuchoka pamutu wamphamvu, voliyumu yogwira ntchito mu silinda imakula pang'onopang'ono. Pakadali pano, mpweya umakankhira valavu yolowera m'mbali mwa chitoliro cholowera ndikulowa silinda mpaka voliyumu yogwira ikafika pazipita, ndipo valavu yolowera yatsekedwa; Pisitoni ya compressor ya piston ikayenda mbali ina, mphamvu yogwira ntchito mu silinda imachepa ndipo kuthamanga kwa gasi kumawonjezeka. Mphamvu yomwe ili mu silinda ikafika ndikukwera pang'ono kuposa kuthamanga kwa utsi, valavu yotulutsa utsi imatseguka ndipo mpweya umatuluka mu silinda mpaka pisitoniyo ipita kumapeto, valavu yotseka ikatseka. Pisitoni ya compressor ya piston ikasunthanso mbali inayo, zomwe zili pamwambazi zibwereza. Ndiye kuti, crankshaft ya piston compressor imazungulira kamodzi, pisitoni imabwezeretsanso kamodzi, ndipo njira yolowetsa, kukanikiza ndi kutulutsa zimakwaniritsidwa motsatana mu silinda, ndiye kuti ntchito yomalizidwa imamalizidwa. Kapangidwe ka shaft imodzi ndi silinda iwiri imapangitsa kuti mpweya wa kompresa utuluke kawiri kuposa yamphamvu imodzi pamlingo wina wovoteledwa, ndipo wayang'aniridwa mwamphamvu pakulumikizana ndi phokoso. Kugwira ntchito pamakina onse: mota ikamathamanga, mpweya umalowa mu kompresa kudzera mu fyuluta yamlengalenga. Compressor imakanikiza mlengalenga. Mpweya wothinikizidwa umalowa mu thanki yosungira mpweya kudzera paipi yolowera mpweya potsegula valavu, ndipo cholozera cha gauge yamagetsi chimakwera mpaka 8 bar ,. Ikaposa 8 bar, batani ladzitchinjiriza limatseka pambuyo pozindikira kupanikizika kwa kanjira, mota imasiya kugwira ntchito, ndipo valavu yama solenoid imatulutsa kuthamanga kwa mpweya mu kompresa mutu mpaka 0. Pakadali pano, mpweya wosinthira ndi mpweya mu thanki yosungira mpweya akadali 8 ￠ bala, ndipo mpweya umatha kudzera mu valavu ya mpira kuyendetsa zida zolumikizidwa kuti zigwire ntchito. Kuthamanga kwa mpweya mu thanki yosungira mpweya ikutsikira ku 5 ￠ bar, chosinthira chotsegulira chimatseguka chokha kudzera pakuphatikizika, ndipo kompresa imayambiranso kugwira ntchito