I-Bosch fuel metering unit (i-fuel metering valve) ekhiqizwa yi-YS ingenye yezingxenye ezibaluleke kakhulu ohlelweni lokuphakelwa kukaphethiloli wenjini yedizili.Ilawula inani likaphethiloli elingena ku-fuel rail ukuze lihlangabezane nezidingo zokusetha ingcindezi yesistimu yesitimela evamile.yakha isilawuli esiyiluphu esivaliwe somfutho wesitimela kanye nenzwa yokucindezela kukaloliwe.
Izifinyezo zesiNgisi ze-Bosch fuel metering valve ezikhiqizwa yi-YS yi-ZME, MEUN, uhlelo lwe-Delphi lubizwa nge-IMV valve, kanti uhlelo lwe-Denso lubizwa ngokuthi i-SCV valve noma i-PCV valve.