Uxinzelelo oluphezulu ivelufa yomda kaloliwe oqhelekileyo oveliswe yiYS ibandakanya uhlobo lweBosch kunye nohlobo lweDenso. Ivalve yokunciphisa uxinzelelo lwe-YS ilawula kwaye ilawula uxinzelelo lweoyile yendlela yeoli ephambili. Ukuze kuqinisekiswe ukusebenza okuqhelekileyo kwe-injini, uxinzelelo lweoyile ye-oyile ehamba phambili kufuneka ifaneleke. Ngeli xesha, i-valve yokunciphisa uxinzelelo iya kuvuleka ngokuzenzekelayo, kwaye ioli iya kubuyiselwa ngepompo yeoli, enokulawula Uxinzelelo lweoyile yendlela yeoli ehamba phambili.