Izihlungi zenjini ziyizingxenye ezibalulekile ezinhlelweni zenjini evuthayo yangaphakathi. Umsebenzi wabo oyinhloko ukuhlunga ukungcola okuvela emoyeni, kuphethiloli, namafutha angena enjinini, ukuqinisekisa ukuthi injini isebenza kahle futhi izinzile. Izihlungi zenjini zihlukaniswa ngezigaba ezilandelayo ngokusekelwe kumidiya yazo yokuhlunga nenjongo.
1. Isihlungi Somoya
Itholakala ekugcineni kwesistimu yokuthatha injini, isihlungi somoya sinesibopho sokuhlunga uthuli, impova, nezinye izinhlayiya ezivela emoyeni ezingena egumbini elivuthayo. Izinhlobo zokuhlunga umoya ezivamile zifaka izihlungi ezomile (ezenziwe ngephepha lokuhlunga elinemihlophe) nezihlungi ezimanzi (ezisebenzisa uwoyela{1}}isipontshi esikhulelwe noma igwebu). Izihlungi ezomile kulula ukuzinakekela futhi zidinga ukuhlanzwa ngezikhathi ezithile noma ukushintshwa; izihlungi ezimanzi ngokuvamile zinokusebenza kahle kokuhlunga kodwa zidinga ukuhlanzwa njalo{3}}nokuphinda ugcobe.
2. Isihlungi samafutha
Isihlungi sikawoyela sisusa imfucumfucu yensimbi, amadiphozithi ekhabhoni, nokunye ukungcola kuwoyela wenjini, siqinisekisa uwoyela ohlanzekile futhi sinciphisa ukuguga kwenjini yangaphakathi. Ngokuya ngesakhiwo sazo, izihlungi zikawoyela zingahlukaniswa ngokuthi zi-spin-zivuliwe (ezilahlwayo, ezidinga ukushintshwa okuphelele) noma ezingashintshwa (isici{2}}esingashintshwa). Izinjini{4}ezisebenza kahle kakhulu ngokuvamile zisebenzisa-izihlungi zokugeleza ezigcwele ukuze kuqinisekiswe ukuthi wonke uwoyela uyahlungwa.
3. Isihlungi Samafutha
Izihlungi zamafutha zihlukaniswa njengezihlungi zikaphethiloli nezihlungi zikadizili. Umsebenzi wabo oyinhloko ukukhipha amanzi, ama-colloid, nezinhlayiya kuphethiloli, ukuvimbela ukuvinjelwa kwesistimu yomjovo kaphethiloli. Izihlungi zikadizili ngokuvamile zinikeza ukunemba kokuhlunga okuphezulu kunezihlungi zikaphethiloli ngoba udizili ungaqukatha ukungcola okwengeziwe. Izihlungi zamafutha ngokuvamile zifakwa phakathi kwephampu kaphethiloli nama-injector futhi zitholakala ngaphakathi (ngaphakathi kwethangi likaphethiloli) noma ngaphandle (ukuze zilungiswe kalula).
4. Isihlungi Somoya Sekhabhinethi (ehlobene kancane)
Nakuba kungeyona ingxenye yesistimu yokuhlunga injini, isihlungi somoya se-cabin sivame ukushiwo. Ihlunga umoya ongena endlini, ithuthukise izinga lomoya ngaphakathi kwemoto. Izinhlobo ezahlukene zezihlungi zidlala indima ebalulekile ekunakekeleni injini. Ukuhlola okuvamile nokushintshwa kwezihlungi kunganweba ngempumelelo impilo yenjini, kuthuthukise ukonga kukaphethiloli, futhi kunciphise ukungcoliswa kokungcola.