I-piston isebenza ngaphansi kwezinga lokushisa eliphezulu, ingcindezi ephezulu, isivinini esikhulu kanye nokugcotshwa okuncane. I-piston ixhumene ngokuqondile negesi lokushisa eliphezulu, futhi izinga lokushisa elisheshayo lingafinyelela ngaphezu kuka-2500K, ngakho-ke, ukushisa kubi kakhulu, futhi izimo zokushisa ukushisa zimbi kakhulu, ngakho-ke izinga lokushisa le-piston liphezulu kakhulu uma usebenza, phezulu kuphakeme njengo-600 ~ 700K, futhi izinga lokushisa alilingani kakhulu; Ingaphezulu lepiston lithwala umfutho wegesi omningi, ikakhulukazi umfutho we-stroke womsebenzi omkhulu kakhulu, injini kaphethiloli efika ku-3 ~ 5MPa, injini kadizili ifika ku-6 ~ 9MPa, eyenza umthelela wepiston, futhi imelane nendima yokucindezela ohlangothini; I-piston ku-cylinder ngesivinini esikhulu (8 ~ 12m /s) ukunyakaza okuphindaphindiwe, futhi isivinini sishintsha njalo, esikhiqiza amandla amakhulu angenayo, ukuze i-piston ibe ngaphansi komthwalo omkhulu owengeziwe. Ukusebenza ngaphansi kwezimo ezinzima kangaka, i-piston izokhubaza futhi isheshise ukuguga, futhi izokhiqiza imithwalo eyengeziwe kanye nokucindezeleka okushisayo, kuyilapho idliwe ngamakhemikhali yigesi.
Ukuhlolwa kwe-piston ikakhulukazi isilinganiso sobubanzi besiketi, ukuphakama kwe-piston ring groove kanye nosayizi wembobo yesihlalo sephini le-piston:
① Ukukhethwa kwepiston kufanele kunqunywe ngokuya ngosayizi wokulungisa we-cylinder. Ngokuvamile ubukhulu obukhulu buphawulwa phezulu kwepiston;
② Ochungechungeni olufanayo lwezinhlanzi, ukwakheka kwepiston akufani ngempela, ngakho-ke lapho ukhetha ipiston, uhlobo oluhambisanayo lwepiston kufanele lukhethwe ngokuya ngohlobo lwenjini. Enjinini efanayo, i-piston yomkhiqizo ofanayo, iqembu elifanayo noma ikhodi yomkhiqizo efanayo kufanele kukhethwe; I-piston yemodeli efanayo kufanele isetshenziswe nekhodi yomkhiqizo efanayo ukuze kuqinisekiswe ukuthi umehluko wobubanzi kanye nekhwalithi ye-piston aweqeli ububanzi obushiwo yimboni yokuqala. Uma kungenjalo, kuzodala ukusha kwenjini okungekuhle, ukusebenza kanzima, ukwehla komnotho namandla nokunye ukwehluleka. Ngakho-ke, lapho ukhetha i-piston, uhlobo oluhambisanayo lwe-piston kufanele lukhethwe ngokuya ngohlobo lwenjini.