Thelọ a na-achịkwa bụ ihe na-achịkwa nke na-achịkwa mmiri ikuku n'ime injin ahụ. Mgbe gas na-abanye na ọkpọkọ, a ga-agwakọta ya na mmanụ ọkụ ma ghọọ ngwakọta a na-ere ọkụ, nke ga-akpọ ma rụọ ọrụ. O jikọrọ ya na nzacha ikuku, ihe mgbochi injin, nke a maara dị ka akpịrị nke injin ụgbọ ala.
Na-eme ka eriri afọ anọ dị ka nke a. Streetle bụ otu n'ime akụkụ kachasị mkpa nke sistemụ ụgbọ ala na - eme eletrik nke taa. Akụkụ dị elu nke ọ bụ nzacha ikuku, akụkụ ala bụ ihe mgbochi cylinder injin, ọ bụ akpịrị nke ụgbọala. A na-agbanwe ụgbọ ala ụgbọ ala na-agbanwe agbanwe, nhicha nke nwere nnukwu mmekọrịta, nhicha nke nwere ike belata mmanụ oriri nwere ike ime ka injin ahụ na-agbanwe ma sie ike. Ekwesighi iwepu uzo ahu ocha, kamakwa elekwasi anya ndi nwe ha kwurita
