Iyo crankshaft chinhu chakakosha cheinjini, uye kuita kwayo kwakanangana nemhando uye hupenyu hweinjini. Mamiriro emhando ye crankshaft anotarisa zvakananga mhando yekushanda uye chengetedzo nhanho yeinjini yedhiziri. Kana iyo crankshaft ikaramba ichishandiswa mushure mekukotama uye torsion deformation, inomhanyisa kupfeka kwe crankshaft yekubatanidza tsvimbo meshini, uye kunyange kukonzera kutsemuka uye kutsemuka mu crankshaft. Injini isati yaunganidzwa, inowanikwa kuti curvature ye crankshaft yakapfuura tekinoroji chiyero, saka coaxial mabhushi haafanire kuungana nekuzeza. Kana iyo crankshaft ine yakawandisa curvature yakaiswa nemakwenzi makuru, crankshaft ichave yakasimba uye yakasununguka panguva yekushanda. Iyo crankshaft inoburitsa imwe dzvinyiriro pagwenzi rinotakura, uye nekudaro, gwenzi rinotakura rinopera nekukurumidza, izvo zvinogona kukonzera tsaona yekupisa kwegwenzi. Ichi chinyorwa chinoongorora chakakonzera crankshaft kukotama nekumonyoroka.

Zvinokonzera crankshaft kukotama uye kumonyoroka:
(1) Kana crankshaft iri kugaya uye kugadzirisa, iyo clamping chinzvimbo haina kunaka, uye iko kurongeka kweguyo pachayo hakuna kukwirira.
(2) Injini yakawandisa, inoramba ichi "deflagration", uye basa racho harina kugadzikana, kuitira kuti simba remagazini imwe neimwe rive risina kuenzana.
(3) Mukaha uripo pakati pe crankshaft bearing uye yekubatanidza tsvimbo yakakurisa, uye kusimba kwakasiyana, izvo zvinoita kuti mainjenari centre isapindire uye inokanganiswa panguva yekushanda.
(4) Kana simbi yeinjini yatsva uye crankshaft yakambundirwa, crankshaft inokotama nekumonyoroka.
(5) Iyo crankshaft axial movement yakakurisa, kana huremu hwepiston uye yekubatanidza tsvimbo boka zvakasiyana, uye mutsauko wakakurisa.
(6) Nguva yekubatidza yakakurumidza zvikuru, kana kuti kazhinji pane 1 kana 2 spark plugs dzinoshanda zvisina kunaka, zvichiita kuti injini ishande zvisina kumira zvakanaka uye crankshaft iwane simba risina kuenzana.
(7) Chiyero che crankshaft chatyoka, kana chiyero cheboka retsvimbo ye crankshaft uye flywheel yatyoka; crankshaft yakasakara zvakanyanya, haina simba rakakwana uye kusimba, kana kukotama uye torsion nekuda kwekusangana kwakashata.
(8) Izvo zvinhu zve crankshaft hazvina kunaka, kana crankshaft yakaremara nekuda kwekuisa zvisina musoro kwenguva yakareba.
(9) Kana mota ikatanga kutyaira, chiito chekusunungura clutch pedal chinokurumidza, uye kubatanidzwa hakuna kupfava. Kana kuti tanga injini nesimba rekumanikidza, zvichiita kuti crankshaft ibve yamonyaniswa kamwe kamwe.
(10) Shandisa mabhureki echimbichimbi paunenge uchityaira, kana kushandisa giya repamusoro uye kumhanya kwakaderera kutyaira uchizeza kana injini isingakwani.