The throttle ndi valve yoyendetsedwa yomwe imayang'anira kutuluka kwa mpweya mu injini. Pamene mpweya umalowa mu chitoliro cholowetsamo, umasakanizidwa ndi mafuta ndikukhala chisakanizo choyaka moto, chomwe chidzayaka ndikugwira ntchito. Zimalumikizidwa ndi fyuluta ya mpweya, chipika cha injini, chomwe chimadziwika kuti kukhosi kwa injini yagalimoto.
Ma injini a petulo a Throttle anayi nthawi zambiri amawoneka chonchi. Throttle ndi imodzi mwamagawo ofunikira kwambiri pamakina amakono a injini zamagalimoto amagetsi. Kumtunda kwake ndi fyuluta ya mpweya, kumunsi kwake ndi chipika cha silinda ya injini, ndipo ndi pakhosi pa injini ya galimoto. Kuthamanga kwa galimoto kumasinthasintha, ndipo phokoso lodetsedwa limakhala ndi ubale wabwino, kuyeretsa mpweya kumatha kuchepetsa kugwiritsira ntchito mafuta kungapangitse injini kukhala yosinthika komanso yamphamvu. The throttle sayenera kuchotsedwa kuyeretsa, komanso cholinga cha eni kukambirana zambiri
