2011 Polaris Ranger RZR ATV Service Manual, Page 121Get this manual

2011 Polaris Ranger RZR ATV Service Manual, Page 121

ELECTRONIC FUEL INJECTION Fuel LinesQuick Connect ELECTRONIC FUEL INJECTION Principal Components The Electronic Fuel Injection
controlled, monitored and continually corrected during operation to maintain peak performanceThe central component of the
system is the Bosch Electronic Control Unit (ECU) which manages system operation, determining the best combination of fuel
mixture and ignition timing for the current operating conditionsAn in-tank electric fuel pump is used to move fuel from the
tank through the fuel line, to the fuel railThe in-tank fuel pressure regulator maintains system operating pressure and returns
any excess fuel back into the tankAt the engine, fuel is fed through the fuel rail and into the injectors, which inject into
the intake portsThe ECU controls the amount of fuel by varying the length of time that the injectors are "on This range can
vary depending on fuel requirementsThe controlled injection of the fuel occurs every other crankshaft revolution, or once
for each 4-stroke cycleThe total amount of fuel needed for one firing of cylinder is injected during each cycleWhen the intake