Okokuqala, i-air ring. Iringi yegesi inxibelelana ngqo nerhasi etshayo kunye nobushushu obuphezulu kunye noxinzelelo oluphezulu, kwaye ubushushu buphezulu kakhulu ngexesha lokusebenza. Ubushushu obuphezulu kunye noxinzelelo oluphezulu lwegesi enokutsha ingena kwi-piston ring groove isuka kwisithuba esiphakathi kodonga lwesilinda kunye nepiston, kwaye idibana neoyile ye-injini ephakanyiswe yintshukumo yokumpompa kweringi yepiston, eya kubangela ukuba i-oyile icoke kwaye qinisa; ukongeza, xa injini iyeka, inaliti yokugqibela I-fuel efakwe kwigumbi lokutsha ayitshisi, kwaye phantsi kwesenzo sobushushu obuphezulu obushiyekileyo bepiston, iya kuphinda icoke kwaye iqine, kwaye ekugqibeleni iidiphozithi zekhabhoni ziya kwenziwa kwaye ifakwe kwi-piston ring groove. Lo ngumgaqo-siseko wokwenziwa kwe-gas ring carbon deposition. Kuphela kwindandatho yomoya, i-oyile ye-injini ephakanyiswe yisenzo sokupompa i-piston ring incinci kakhulu, kwaye ininzi idiphozithi yekhabhoni efakwe ngokutshiswa okungaphelelanga kwepetroli. Oko kukuthi, ininzi yeediphozithi zekhabhoni ezifakwe kwindandatho yegesi zibangelwa yipetroli, kwaye umgangatho kunye nokutsha kwepetroli kuchaphazela ngokuthe ngqo ubuninzi kunye nohlobo lweediphozithi zekhabhoni.

Umsesane wepiston uhlala unyuka usihla kwi-piston ring groove, kwaye umbhobho awukho setyhula ngokupheleleyo. I-piston iphinda ibuyele phezulu nangaphantsi kwi-cylinder, kwaye i-piston ring ihlala ixinzelelwe kwaye yoluliwe. Iidiphozithi zekhabhoni, zihlala zicinezelwa, azikwazi ukugcinwa, kuphela i-carbon deposits kwi-gap yangasemva ingahlala. Ngamanye amazwi, iidiphozithi zekhabhoni zishiywe kuphela kwicala elinye lendandatho yomoya, kwaye akunakwenzeka ukutshixa i-air ring ukufa, kwaye akunakwenzeka ukuba kubangele ukuba injini itshise ioli. Ngexesha elifanayo, iidiphozithi zekhabhoni zifakwe kwi-gap yangasemva, enciphisa ngokuthe ngqo i-gap yangasemva, kodwa inokuqinisa isitywina kunye nokunciphisa umphumo wokupompa.