I-throttle iyivalvu elawulwayo elawula ukugeleza komoya enjinini. Uma igesi ingena epayipini lokungenisa, izoxutshwa nophethiloli bese iba ingxube evuthayo, ezosha futhi isebenze. Ixhunywe kusihlungi somoya, ibhlokhi lenjini, elaziwa ngokuthi umphimbo wenjini yemoto.
Izinjini zikaphethiloli ezine-throttle ngokuvamile zibukeka kanje. I-throttle ingenye yezingxenye ezibaluleke kakhulu zesistimu yenjini yemoto kagesi yanamuhla. Ingxenye engenhla yayo iyisihlungi somoya, ingxenye engezansi iyisilinda senjini, futhi ingumphimbo wenjini yemoto. Ukusheshisa imoto kuyaguquguquka, futhi i-throttle engcolile inobuhlobo obuhle, ukuhlanza i-throttle kunganciphisa ukusetshenziswa kukaphethiloli kungenza injini iguquguquke futhi iqine. I-throttle akufanele isuswe ukuze ihlanzwe, kodwa futhi nokugxila kwabanikazi ukuze baxoxe kabanzi.
