Inzira eshatu bypass salle nyinshi zirimo umubiri ibiri wa valve, disiki ebyiri, intebe ebyiri valve, tee imwe, na silinderi 4. Umubiri wa valve ugabanijwemo ibiryo bitatu a, b, na c bifitanye isano hanze nintebe ya valve. Ibikoresho byo gushiraho ikimenyetso hagati yumubiri wa valve hamwe nintebe ya valve. Isahani yo mu kirere mu cyuho ihujwe na silinderi binyuze muri shaft ihuza. Muguhindura umwanya wa valve, icyerekezo cyurugendo rwumuyoboro gishobora guhinduka; Kubera guhanahana ubushyuhe binyuze mu mubiri wo kubikamo ubushyuhe, ubushyuhe bwakazi bwa valve isubira inyuma ni hasi cyane, kandi nta bisabwa byihariye kubikoresho bya valve isubira inyuma.

Ariko, bitewe nibisabwa umusaruro uhoraho, hakenewe valve hakenewe gutsinda kwambara no kurira byatewe numukungugu muri gaze ya flue ningaruka mbi. Ibice bya mashini bigomba kwemeza ko kwambara no kurira byatewe no guhinduranya kenshi ibice, byasabye kwizerwa cyane no kubaho.