Chrysler Sebring Electric Fuel Pump
About Electric Fuel Pump
The introduction of fuel injection systems in modern engines made it necessary to use electric fuel pumps. An electric fuel pump supplies the fuel to the injectors at a defined pressure. The injectors spray the fuel into the intake manifold or directly into the combustion chamber. Electric fuel pumps are usually mounted inside the fuel tank, though some may be mounted outside the tank. Some vehicles may even have two fuel pumps. Electric fuel pumps in vehicles spins as the engine runs, and can circulate thousands of gallons of fuel in their lifetime. Not all fuel is sprayed through the injectors at low load/idle, so the fuel pump regulator returns the unused fuel to the fuel tank on most systems. Electric fuel pump is used on engines to pump fuel from the gas tank to the injectors. The pump delivers the fuel under high pressure so the injectors can spray the fuel into the engine. Fuel pressure must be within specifications for the engine to run correctly. Electric fuel pump runs continuously once the engine starts, and continues to run as long as the engine is running and the ignition key is on. The pump may run at a constant speed, or it may operate at a variable speed depending on engine load and speed. If the engine stalls, the PCM will detect the loss of the RPM signal and turn the pump off. Many vehicles also have an "inertia safety switch" that shuts off the fuel pump in the event of an accident. This is done to reduce the risk of fire.
What is the purpose of Electric Fuel Pump?
The purpose of a car fuel pump is to convey the required quantity of fuel from the tank to the engine at the necessary pressure.
How Electric Fuel Pump Works?
The fuel pump module assembly is mounted in the fuel tank and includes the electric fuel pump, fuel strainer and fuel gauge sending unit. Electric fuel pumps are mounted inside the fuel tank. Some vehicles may even have two fuel pumps. When the driver turns the ignition key on, the powertrain control module energizes a relay that supplies voltage to the fuel pump. The motor inside the pump starts to spin and runs for a few seconds to build pressure in the fuel system Fuel is drawn into the pump through an inlet tube and mesh filter sock. The fuel then exits the pump through a one-way check valve, and is pushed toward the engine through the fuel line and filter. The fuel filter traps any rust, dirt or other solid contaminants that may have passed through the pump to prevent such particles from clogging the fuel injectors. The fuel then flows to the fuel supply rail on the engine and is routed to the individual fuel injectors. A fuel pressure regulator on the fuel rail maintains fuel pressure, and routes excess fuel back to the tank. The fuel pump has fuel gauge sending unit assembly that includes a float that sends an electrical signal to the fuel gauge on the instrument panel.
Where is Electric Fuel Pump Located?
The fuel pump is located at the fuel tank and is designed to convey the required quantity of fuel from the tank to the engine at the necessary pressure.