Buick Regal Electric Fuel Pump
About Electric Fuel Pump
The introduction of fuel injection systems into modern engines facilitated the use of electric fuel pumps. The fuel is supplied to the injectors by an electric fuel pump at a pre-defined pressure. The fuel is sprayed into the intake manifold or directly into the combustion chamber by the injectors. Electric fuel pumps are commonly installed inside the fuel tank, although some can be installed outside the tank also. Some vehicles could even have two pumps for fuel supply. In cars, electric fuel pumps turn as the engine works, and in their lifetime will circulate thousands of gallons of fuel. Not all fuel is sprayed at low load/idle through the injectors, hence the fuel pump regulator on most systems returns the unused fuel to the fuel tank. On generators, the electric fuel pump is used for pumping fuel from the gas tank to the injectors. The pump delivers the fuel under high pressure, allowing the injectors to spray the fuel into the motor. For the engine to run properly, the fuel pressure must be within requirements. If the engine begins, the electric fuel pump runs continuously, and continues to run as long as the engine runs on and the ignition key is on. The pump can run at a constant speed, or it can operate at variable speed depending on the load and speed of the engine. When the engine stalls, the PCM detects the loss of the RPM signal and turns off the pump. Many vehicles also have a "safety inertia switch", which shuts off the fuel pump in case of an accident. This is done to minimize fire hazard.
What is the purpose of Electric Fuel Pump?
A car fuel pump has the purpose of transporting the required quantity of fuel from the tank to the engine at the necessary pressure.
How Electric Fuel Pump Works?
The assembly of the fuel pump module is mounted in the fuel tank and comprises the sending mechanism for the electric fuel pump, fuel strainer and fuel gauge. Within the fuel tank is mounted electric fuel pumps. Some vehicles could even have two pumps for fuel. The powertrain control module energises a relay which supplies voltage to the fuel pump when the driver switches on the ignition key. The motor inside the pump begins spinning and runs through an inlet tube and mesh filter sock for a few seconds to create pressure in the fuel system Fuel is drawn into the pump. The fuel then exits the pump through a one-way test valve and is forced via the fuel line and filter toward the engine. The fuel filter removes any dust, dirt or other solid pollutants that could have passed through the pump to prevent the fuel injectors from being obstructed by these particles. The fuel then flows onto the engine's fuel supply rail and is directed to the individual injectors. Along the fuel line, a fuel pressure regulator retains fuel pressure and returns excess fuel to the tank. The fuel pump has a fuel gauge receiving unit assembly, which involves a float that sends an electrical signal on the instrument panel to the fuel gauge.
Where is Electric Fuel Pump Located?
The fuel pump is located at the fuel tank and is intended to convey the necessary quantity of fuel from the tank to the engine at the appropriate speed.