The exhaust muffler chitoliro ndi mbali ya injini utsi dongosolo.Dongosolo la chitoliro chotulutsa utsi makamaka limaphatikizapo utsi wochuluka, chitoliro cha utsi ndi muffler.Nthawi zambiri, chothandizira katatu chowongolera kuwongolera kutulutsa kwa zoipitsa za injini chimayikidwanso muutsi wamagetsi.Chitoliro cha utsi nthawi zambiri chimaphatikizapo chitoliro cha kutsogolo ndi chitoliro chakumbuyo.

Mpweya watsopano ndi petulo zikasakanizidwa mu injini kuti iyake, kutentha kwambiri komanso mpweya wothamanga kwambiri umapangidwa kukankhira pisitoni.Pamene mphamvu ya gasi imatulutsidwa, sikhalanso yamtengo wapatali kwa injini.Mipweya imeneyi imakhala mpweya wotulutsa mpweya ndipo imatulutsidwa mu injini.Pambuyo pa kutuluka kwa silinda, mpweya wotulutsa mpweya umalowa m'kati mwake.Pambuyo potulutsa mpweya wa silinda iliyonse, mpweya wotulutsa mpweya umatulutsidwa kudzera mutope yotulutsa mpweya.

Popeza malamulo oteteza chilengedwe ndi okhwima kwambiri pamiyezo yotulutsa magalimoto, mosasamala kanthu za kungokhala, kuthamanga, kuyendetsa pang'onopang'ono, kuyendetsa mwachangu kapena kutsika, magalimoto onse ayenera kukwaniritsa miyezo yotulutsa mpweya.Poyang'anizana ndi ziletso zokhwima zotere, kuwonjezera pakukwaniritsa bwino pakati pa magwiridwe antchito ndi umuna, chinthu chokhacho ndi chosinthira chothandizira.Chosinthira chothandizira nthawi zambiri chimapangidwa ndi zitsulo zamtengo wapatali, kuphatikiza chothandizira makutidwe ndi okosijeni, chothandizira kuchepetsa komanso chosinthira chanjira zitatu chomwe chimagwiritsidwa ntchito m'magalimoto ambiri.Pambuyo pa utsi wambiri, chosinthira chothandizira chimalumikizidwa kuti chisandutse zowononga zosakwanira zonse kukhala zinthu zopanda vuto kuteteza chilengedwe.

Imalumikizidwa ndi muffler kuchokera ku chosinthira chothandizira.Gawo la mtanda la muffler ndi chinthu chozungulira kapena chowulungika, chomwe chimawotchedwa ndi mbale zopyapyala zachitsulo ndikuyikidwa pakati kapena kumbuyo kwa dongosolo lotayirira.Pali mndandanda wa baffles, zipinda, orifices ndi mapaipi mkati mwa muffler.Chochitika cha kusokonezedwa kwa ma acoustic reflection ndi kuletsa kumagwiritsidwa ntchito kuti pang'onopang'ono kufooketsa mphamvu ya phokoso, kuti adzipatula ndikuchepetsera mphamvu ya pulsating yomwe imapangidwa nthawi iliyonse pamene valve yotulutsa mpweya imatsegulidwa.