Ọrụ mgbanaka Piston gụnyere akara, na-achịkwa mmanụ (nchịkwa mmanụ), njikwa okpomọkụ (nfefe ọkụ), nduzi (nkwado) ọrụ anọ. Akara: na-ezo aka na mkpuchi gas, ekwela ka ụlọ combustion gas na-agbapụta na crankcase, a na-achịkwa nsị gas na opekempe, melite arụmọrụ ọkụ. Ngwunye ikuku agaghị ebelata ike nke engine, ma na-eme ka mmanụ na-emebi emebi, nke bụ isi ọrụ nke mgbanaka gas; Gbanwee mmanụ (nchịkwa mmanụ): oke mmanu mmanu mmanu na mgbidi cylinder na-ekpochapu, a na-ekpuchikwa mgbidi cylinder na ihe nkiri mmanụ dị mkpa iji hụ na mmanye nkịtị nke cylinder na piston na mgbanaka, nke bụ isi ọrụ. mgbanaka mmanụ. N'ime engines dị elu nke oge a, a na-akwụ ụgwọ nlebara anya pụrụ iche na ọrụ nke ihe nkiri mmanụ piston ring; Ntugharị ọkụ: okpomọkụ nke piston na-ebufe na cylinder liner site na piston mgbanaka, ya bụ, mmetụta jụrụ oyi. Dị ka data a pụrụ ịdabere na ya, 70 ~ 80% nke okpomọkụ natara site na piston n'elu nke na-adịghị mma na-agbasasị site na piston mgbanaka na mgbidi cylinder, na 30 ~ 40% nke piston jụrụ oyi na-agbasasị site na piston mgbanaka na cylinder mgbidi; Nkwado: Mgbanaka piston na-eme ka piston dị na cylinder ahụ, na-egbochi kọntaktị kpọmkwem n'etiti piston na mgbidi cylinder, na-eme ka piston na-emegharị nke ọma, na-ebelata nkwụsị esemokwu, ma na-egbochi piston ịkụ aka cylinder. N'ozuzu, piston nke engine petrol na-eji mgbanaka gas abụọ na otu mgbanaka mmanụ, ebe engine mmanụ dizel na-ejikarị mgbanaka mmanụ abụọ na otu mgbanaka gas.