Fuel pump capacity and pulse width for 09 and newer vehicles?
The first generation (134HP) Hybrid's had a 750cc/min fuel pump capacity and pulse width 3.6mS hot idle---4.5-5.5mS at 30mph----7-8mS at 55mph via Helms reference. What do the 2nd generation vehicles produce?
|
Re: Fuel pump capacity and pulse width for 09 and newer vehicles?
From the Ford '09 FEH PC/ED Manual.
Fuel System Overview The fuel system supplies the fuel injectors with clean fuel at a controlled pressure. The powertrain control module (PCM) controls the fuel pump and monitors the fuel pump circuit. The PCM controls the fuel injector on/off cycle duration and determines the correct timing and amount of fuel delivered. When a new fuel injector is installed it is necessary to reset the learned values contained in the keep alive memory (KAM) in the PCM. For more information, refer to Section 2, Resetting The Keep Alive Memory (KAM). Mechanical Returnless Fuel System (MRFS) — Dual Speed The dual speed MRFS uses a fuel tank with reservoir, the fuel pump, the fuel pump control module, the fuel pressure regulator, the fuel filter, the fuel supply line, the fuel rail, and fuel injectors. For additional information on the fuel system components, refer to Engine Control Components in this section. Operation of the system is as follows:
Dual Speed Mechanical Returnless Fuel System with Lifetime Fuel Filter Fuel Pump Control — Dual Speed MRFS The FP signal is a duty cycle command sent from the PCM to the fuel pump control module. The fuel pump control module uses the FP command to operate the fuel pump at the speed requested by the PCM or to turn the fuel pump off. A valid duty cycle to command the fuel pump on, is in the range of 15-47%. The fuel pump control module doubles the received duty cycle and provides this voltage to the fuel pump as a percent of the battery voltage. When the key is turned on, the fuel pump runs for about 1 second and is requested off by the PCM if engine rotation is not detected. FUEL PUMP DUTY CYCLE OUTPUT FROM PCM FP Duty Cycle CommandPCM StatusFuel Pump Control Module Actions0-15%Invalid off duty cycleThe fuel pump control module sends a 20% duty cycle signal on the fuel pump monitor (FPM) circuit. The fuel pump is off.37%Normal low speed operation.The fuel pump control module operates the fuel pump at the speed requested. The fuel pump control module sends a 60% duty cycle signal on FPM circuit.47%Normal high speed operation.The fuel pump control module operates the fuel pump at the speed requested. The fuel pump control module sends a 60% duty cycle signal on FPM circuit.51-67%Invalid on duty cycle.The fuel pump control module sends a 20% duty cycle signal on the FPM circuit. The fuel pump is off.67-83%Valid off duty cycleThe fuel pump control module sends a 60% duty cycle signal on FPM circuit. The fuel pump is off.83-100%Invalid on duty cycle.The fuel pump control module sends a 20% duty cycle signal on the FPM circuit. The fuel pump is off. Fuel Pump Monitor (FPM) — Dual Speed MRFS The fuel pump control module communicates diagnostic information to the PCM through the FPM circuit. This information is sent by the fuel pump control module as a duty cycle signal. The four duty cycle signals that may be sent are listed in the following table. FUEL PUMP DRIVER MODULE DUTY CYCLE SIGNALS Duty CycleComments20%This duty cycle indicates the fuel pump control module is receiving an invalid duty cycle from the PCM.40%This duty cycle indicates the fuel pump control module is receiving an invalid duty cycle from the RCM.60%This duty cycle indicates the fuel pump control module is functioning normally.80%This duty cycle indicates the fuel pump control module is detecting a concern with the secondary circuits. Fuel Filters The system contains three filtering or screening devices. Refer to Workshop Manual Section 310-01 Fuel Tank and Lines for the individual component locations.
Fuel Pump Reference values KOEO***Hot Idle***30 MPH***55 MPH OFF/75% ON/41.67% ON/48% ON/41.06% |
All times are GMT -7. The time now is 08:00 PM. |
© 2024 MH Sub I, LLC dba Internet Brands