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.