Izinyuso ze-injini, ngokusesikweni ezaziwa ngokuba zii-injini zokunyuswa okanye iipadi zeenyawo ze-injini, zizinto ezilastiki ezidibanisa i-injini yesithuthi nesakhelo (okanye umzimba). Ngokuqhelekileyo zenziwe ngerabha okanye ezinye izinto zepolymer kwaye zinokuqulatha amathambo esinyithi okomeleza amandla kunye nokuzinza. Owona msebenzi uphambili wokunyuswa kwe-injini kukufunxa kunye nokuthomalalisa iintshukumo eziveliswa kukusebenza kwe-injini, ukuthintela oku kungcangcazela ukuba kungagqithiselwa ngokuthe ngqo kumzimba wesithuthi, ngaloo ndlela kuphuculwe ukuqhuba ngokutyibilikayo kunye nokukhululeka.
