Bonenet, yomwe imadziwikanso kuti hood, ndiye gawo lowoneka bwino kwambiri komanso gawo limodzi lomwe ogula magalimoto nthawi zambiri amayang'ana. Zofunikira zazikulu za chivundikiro cha injini ndi kutentha kwa kutentha, kutulutsa kovuta, kulemera komanso kulimba mtima.
Chophimba cha injini nthawi zambiri chimakhala chopangidwa ndi kapangidwe kake, chimasanjidwa ndi kutentha kwa kutentha, ndipo mbale yamkati imagwira ntchito yolimbikitsa. Geometry yake imasankhidwa ndi wopanga, yomwe ndiye fungulo la mafupa. Bonnet ikatsegulidwa, nthawi zambiri idatembenukira kumbuyo, komanso gawo laling'ono la ilo limatembenukira kutsogolo.
Chivundikiro cha injinizi chiyenera kutsegulidwa pakona yokonzedweratu ndipo sayenera kulumikizana ndi kalasi yakutsogolo. Payenera kukhala kutalika kochepa kwa pafupifupi 10 mm. Pofuna kupewa kugwedezeka chifukwa chonjenjemera pakuyendetsa galimoto, kutsogolo kwa chivundikiro kuyenera kukhala ndi chida chotchinga chabooki. Kusintha kwa chipangizo chokhoma kumakonzedwa pansi pa bolodi la onyamula. Khomo lagalimoto litatsekedwa, chivundikiro cha injini liyeneranso kukhala lotsekedwa nthawi yomweyo.
