Injini yensimbi engagqwaliimiphini asetshenziswa kumamotho ezimoto yizingxenye ezakhiwe ngokunemba eziklanyelwe ukuhlinzeka ngokudluliswa kwamandla okuthembekile nokuqina ezindaweni ezifunayo. Lawa mashafu ngokuvamile enziwa ngensimbi engagqwali yekhwalithi ephezulu, enikeza ukumelana nokugqwala okuhle kakhulu namandla.
Ezinhlelweni zezimoto, izinsimbi zensimbi engagqwali zidlala indima ebalulekile ekudluliseleni ukunyakaza okujikelezayo kusuka emoteni kuya ezintweni ezahlukahlukene ezinjengabalandeli, amaphampu, namagiya. Zenzelwe ukumelana nesivinini esikhulu, ukulayishwa, namazinga okushisa ajwayele ukuhlangana nawo kumasistimu ezimoto.
Enye yezinzuzo ezibalulekile zamashafti ensimbi engagqwali igiya ukumelana nokugqwala, okusiza ukuqinisekisa ukusebenza kwesikhathi eside nokwethembeka ezindaweni ezinokhahlo zezimoto. Ukwengeza, ama-shafts ensimbi engagqwali angenziwa ngomshini ukuze abekezelelane kakhulu, okuvumela ukuqondanisa okunembile nokusebenza kahle.