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. yenza isilawuli se-closed-loop yokucindezela kukaloliwe kanye nenzwa yokucindezela kukaloliwe.
Izifinyezo zesiNgisi ze-Bosch fuel metering valve ezikhiqizwa yi-YS yi-ZME, MEUN, isistimu ye-Delphi ibizwa nge-IMV valve, kanti isistimu ye-Denso ibizwa ngokuthi i-SCV valve noma i-PCV valve.