Emeza amahuza 3 yumuhondo kumurongo wigihe. Shyiramo urunigi rwigihe na crankshaft sprocket. Ihuza ryambere ryumuhondo rihuza crankshaft sprocket igihe cyigihe. Icyitonderwa: Hano hari amasano atatu yumuhondo kumurongo wigihe. Babiri mubihuza byumuhondo (hamwe nibitandukaniro 6 bihuza) bihujwe nibimenyetso byigihe cyo gufata no gusohora kamashaft yamashanyarazi.

Iyo umuvuduko wa moteri ugabanutse, impinduka za valve igihe cyagenwe kigabanuka, urunigi rwo hejuru rurarekurwa, kandi urunigi rwo hasi rukora kumurongo wo kuzunguruka wa kamera hamwe no kugenzura kumanuka. Kuberako kamashashi isohoka idashobora kuzenguruka isaha yisaha munsi yigikorwa cyumukandara wigihe, camshaft yo gufata ikorerwa hamwe nimbaraga ebyiri: imwe nuko kuzunguruka bisanzwe kwamashanyarazi asohora imbaraga zo gukurura urunigi rwo hasi; ikindi ni Igenzura risunika urunigi kandi ryohereza imbaraga zo gukurura kuri kamera. Amashanyarazi ya kamera azenguruka inguni yongeyeho wise isaha yisaha, yihutisha gufunga kwifata, ni ukuvuga, gufata valve yatinze gufunga bigabanuka na θ dogere. Iyo umuvuduko wiyongereye, umugenzuzi arazamuka kandi urunigi rwo hasi ruruhutse. Amashanyarazi yamashanyarazi azunguruka ku isaha. Ubwa mbere, urunigi rwo hasi rugomba gukomezwa kugirango ruhinduke uruhande rukomeye mbere yo gufata kamera yo gufata ishobora kuzunguruka na camshaft yuzuye. Muburyo bwurunigi rwo hasi ruba rworoshye kandi rukomeye, kamashashi isohoka yazengurutse inguni θ, kamera yo gufata itangira kugenda, kandi gufunga valve bifata buhoro.

Ibikurikira nuburyo bwo kwishyiriraho urunigi rwigihe:
1. Banza uhuze ikimenyetso cyigihe kuri camshaft sprock hamwe nikimenyetso cyigihe ku gifuniko;
2. Hindura igikonjo kugirango piston ya silinderi imwe iri hejuru yapfuye;
3. Shyiramo urunigi rwigihe kugirango ikimenyetso cyigihe cyurunigi gihujwe nikimenyetso cyigihe kumasoko ya camshaft;
4. Shyiramo pompe yamavuta ya pompe kugirango ikimenyetso cyigihe cyumunyururu gihujwe nikimenyetso cyigihe kuri pompe yamavuta.