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.