Chenjerera! Nzira yakakosha yekufira injini yemotokari!
Chinhu chinosefa mhepo chinonziwo katuriji yekusefa mhepo, sefa yemhepo, maitiro, nezvimwewo. Chinonyanya kushandiswa pakusefa mhepo muzvitima zveinjiniya, mota, zvitima zvekurima, marabhoritari, makamuri ekusefa asina utachiona uye makamuri akasiyana-siyana ekusefa nemazvo. Mafirita emhepo anonyanya kuwanikwa mumotokari.
Mukutaura kwakakurumbira, sefa yemhepo yemota yakafanana nemasiki, inosefa zvidimbu zvakasungirirwa mumhepo. Nokudaro, chinhu chesefa yemhepo chinogona kuwedzera hupenyu hweinjini. Zvisinei, kune varidzi vazhinji vari pamusika vasingateereri kutsiva mafirita emhepo nguva dzose.
Kana chinhu chemhepo chinosefa chisina basa, saka kupera kwecylinder, piston uye piston ring yemotokari kuchawedzera, uye kumanikidzwa kwecylinder kunogona kukonzerwa muzviitiko zvakakomba, izvo zvinozoita kuti injini yemotokari ipfupike. Saka, varidzi vanofanira kuyeuka kuchenesa nekutsiva firita yemhepo yemotokari nguva nenguva. Kuchenesa kunoenderana nemamiriro emhepo ari munzvimbo yekutyaira, kazhinji mushure mekuchenesa katatu, firita yemhepo yemotokari inofanira kufungwa nezveimwe itsva.
