--- nke Aaron Turpen na 20-Mar-2015
Mgbe ị na-agbanwe eriri oge / yinye ma ọ bụ na-edozi oge na ụgbọ ala, ịghọta akara oge na crankshaft na camshaft pulleys bụ isi ihe iji nweta ya nke ọma. Tuners ga-adịkwa mkpa ịmara nke ọma akara ndị a n'ihi na ha dị mkpa maka ịhazigharị ọnụego RPM.

Ọtụtụ engines ga-enwe akara abụọ ma ọ bụ atọ na crankshaft pulley nke dị n'ime ka a ga-ejikọta ya na akara "akụ" na ngọngọ engine. A ga-achọtakarị akara ndị yiri ya na opekata mpe otu n'ime ihe ndọba ụgbọala camshaft. Mgbe etinyere eriri oge ma ọ bụ yinye nke ọma, akara edobere na akara mgbochi na crankshaft ga-adị ka akara edobere na camshaft na isi. Ebumnuche nke ịtọ oge bụ ka usoro a mee.

Ebe etiti nwụrụ anwụ (TDC) nwere ike ịbụ akara etiti, aka ekpe ma ọ bụ aka nri, dabere na injin ahụ. N'ọtụtụ n'ime injinia, ọ bụ etiti akara atọ, mana ụgbọ ala gị akọwapụtara nwere ike ịdị iche, yabụ rụtụ aka n'akwụkwọ ntuziaka onye nwe gị na /ma ọ bụ ntuziaka nrụzi ụlọ ahịa.