volume controlling unit (in-line injection pump) The volume control is achieved by a solenoid coil which is actuated by he control unit. The control travel sensor informs the control unit of the position of the control rod. description ordernumber 386 see also: centrifugal governor of a DE (variable-speed governor) KE-Jetronic fuel injection Pump-nozzle injection system II VP 44 radial-piston distributor pump