Umshini wokuxhuma we-crankyakhiwe izingxenye ezintathu: iqembu lomzimba, iqembu lenduku yokuxhuma ipiston kanye neqembu le-crankshaft flywheel. I-crank connecting rod mechanism iyingxenye eyinhloko ehambayo yenjini ukuze ibone umjikelezo wokusebenza futhi iqedele ukuguqulwa kwamandla.

Ku-stroke yamandla, iguqula i-piston yamandla ashisayo ekhiqizwa ukushiswa kukaphethiloli ibe ukunyakaza okuphindaphindayo kanye nokujikeleza kwe-crankshaft ibe amandla emishini ukuze ikhiphe amandla; kokunye ukushaywa, kuncike ekujikelezeni kwe-crank kanye ne-flywheel futhi ishayela ipiston phezulu naphansi ngenduku yokuxhuma ukuze Udale izimo zomsebenzi olandelayo.

Umsebenzi we-crank connecting rod mechanism ukuhlinzeka indawo yokuvutha, ukuguqula ingcindezi yokunwetshwa kwegesi engaphezulu kwepiston ngemva kokuba uphethiloli ushiswe ku-torque yokujikeleza kwe-crankshaft, kanye namandla aphumayo aqhubekayo.

(1) Shintsha ukucindezela kwegesi ku-torque ye-crankshaft;

(2) Shintsha ukunyakaza kwepiston okuhambisanayo kube umnyakazo ojikelezayo we-crankshaft;

(3) Guqula amandla omlilo phezulu kwepiston abe yitorque ye-crankshaft ukuze ikhiphe amandla omshini emshinini osebenzayo.