Makina oyendetsa galimoto atayambika, imayendetsa kontrakitala ya kompresa kuti izizungulira kudzera m'lamba laling'onoting'ono, lomwe limasandulika pisitoni kudzera mu ndodo yopingasa kuti ipangitse kuyendanso mu silinda. Pisitoni ikachoka pachikuto kupita kutsinde, voliyumu yamphamvu imakulira, kuthamanga kwa silinda kumakhala kotsika kuposa kuthamanga kwa mumlengalenga, ndipo mpweya wakunja umalowetsa silinda kudzera mu fyuluta ndi valavu yokoka; Pambuyo pofika pansi pakufa, pisitoni imayenda kuchokera kutsinde mpaka mbali ya chivundikirocho, valavu yokoka imatsekedwa, voliyumu yamphamvu imachepa pang'onopang'ono, mpweya womwe uli mumtsukowo umapanikizika ndipo kuthamanga kumakulirakulira. Mphamvu ikafika pamtengo winawake, valavu yotulutsa mpweya imakankhidwa ndikutseguka, ndipo mpweya wopanikizika umalowa mu thanki yosungira mpweya kudzera pa payipi. Mwanjira imeneyi, kompresa imagwira ntchito mozungulira, mosalekeza imatumiza mpweya wopanikizika kupita kusanki yosungira mpweya, ndipo pang'onopang'ono imakulitsa kukakamiza mu thankiyo, Kuti mupeze mpweya wofunikira.