Iinjini zerhasi ezikhusela ugqabhuko-dubulo azilulungelanga ubume bendawo efuna iimowutha ezikhusela uthuli. Oku kungenxa yemigangatho yesizwe eyahlukeneyo yobungqina bombane abayithobelayo: iinjini zegesi ezinobungqina bokudubula zihambelana ne-GB3836, ngelixa iimotor ezinobungqina bothuli zilandela i-GB12476.
IiMotor ezihlangabezana nale migangatho yomibini kwaye ziphumelele iimvavanyo zomntu ngamnye zinokubhekiswa kuzo njengeemotor eziphawulwe kabini ezingqina ukudubula.. Ezi njini zisebenza ngeendlela ezininzi, ukuvumela ukutshintshisana kwimekobume efuna igesi okanye imigangatho yobungqina bokudubula kothuli.