Ụkpụrụ ya na -arụ ọrụ bụ: mgbe moto na -ebugharị compressor crankshaft ka ọ na -atụgharị, site na nnyefe nke mkpanaka njikọ, piston nwere mmanụ onwe ya na -enweghị ịgbakwunye mmanụ ọ bụla ga -aga n'ihu na n'ihu, olu na -arụ ọrụ mejupụtara mgbidi dị n'ime nke cylinder. , isi cylinder na elu elu piston ga -agbanwe kwa oge. Mgbe piston nke compressor piston malitere ịkwaga site na isi cylinder, olu ọrụ na cylinder ji nwayọọ nwayọọ na -abawanye. N'oge a, gas na -akwagharị valvụ mbata n'akụkụ ọkpọ mmiri wee banye na cylinder ruo mgbe olu na -arụ ọrụ ruru oke, na -emechi valvụ mbata; Mgbe piston nke compressor piston na -aga n'akụkụ nke ọzọ, olu ọrụ na cylinder na -ebelata yana nrụgide gas na -abawanye. Mgbe nrụgide dị na cylinder rute ma dịtụ elu karịa nrụgide mkpocha, valvụ iyuzucha emepe ga -emepe, a na -ahapụ gas site na cylinder ruo mgbe piston ga -aga n'ọnọdụ oke, valvụ iyuzucha na -emechi. Mgbe piston nke compressor piston na -agagharị n'akụkụ ọzọ, usoro ahụ dị n'elu na -emegharị. Nke ahụ bụ, crankshaft nke compressor piston na -agbagharị otu ugboro, piston na -akwụghachi otu ugboro, a na -ahụta usoro oriri, mkpakọ na ike ọgwụgwụ n'usoro na cylinder, ya bụ, okirikiri ọrụ na -agwụ. Nhazi nke otu ogwe osisi na cylinder okpukpu abụọ na -eme ka ikuku gas nke compressor dị okpukpu abụọ nke otu cylinder n'otu ọsọ a tụrụ anya, ma na -achịkwa nke ọma na ịma jijiji na njikwa mkpọtụ.