Metered fuel pressure Unmetered fuel pressure Idle valve lever connected to throttle lever linkage Manual mixture control and idle cut off lever Fuel inlet pressure Metered fuel pressure Fuel inlet Fuel strainer Metering jet Figure 2-34.  Fuel metering section of the injector.  far as necessary to pass this amount to the nozzles. At idle,  the opening required is very small; the fuel for the individual  cylinders is divided at idle by the flow divider. pressure, divides fuel to the various cylinders at all engine  speeds, and shuts off the individual nozzle lines when the  control is placed in idle cutoff. Referring to the diagram in  Figure 2-36 , metered fuel pressure  enters the flow divider through a channel that permits fuel to  pass through the inside diameter of the flow divider needle.  At idle speed, the fuel pressure from the regulator must build  up to overcome the spring force applied to the diaphragm and  valve assembly. This moves the valve upward until fuel can  pass out through the annulus of the valve to the fuel nozzle.  [Figure 2-37]  Since the regulator meters and delivers a fixed  amount of fuel to the flow divider, the valve opens only as  As fuel flow through the regulator is increased above idle  requirements, fuel pressure builds up in the nozzle lines.  This pressure fully opens the flow divider valve, and  fuel distribution to the engine becomes a function of the  discharge nozzles. A fuel pressure gauge, calibrated in pounds per hour fuel  flow, can be used as a fuel flow meter with the Bendix RSA  injection system. This gauge is connected to the flow divider  and sense the pressure being applied to the discharge nozzle.  This pressure is in direct proportion to the fuel flow and  indicates the engine power output and fuel consumption. The fuel discharge nozzles are of the air bleed configuration.  There is one nozzle for each cylinder located in the cylinder  head.  [Figure 2-38]  The nozzle outlet is directed into the  intake  port. Each nozzle incorporates a calibrated jet. The  jet size is determined by the available fuel inlet pressure and  the maxim um fuel flow required by the engine. The fuel  is discharged through this jet into an ambient air pressure  chamber within the nozzle assembly. Before entering the  individual intake valve chambers, the fuel is mixed with air to  aid in atom izing the fuel. Fuel pressure, before the individual  nozzles, i in direct proportion to fuel flow; therefore, a  Fuel Discharge Nozzles 2-24 Figure 2-35.  Fuel inlet and metering.