The fuel pump in a car is a crucial component of the engine’s fuel supply system, with the following main functions:
1）Fuel Delivery: The fuel pump is responsible for drawing fuel from the tank and delivering it to the engine, ensuring that the engine receives sufficient fuel supply under various operating conditions.
2）Maintaining Fuel Pressure:
The fuel pump maintains stable fuel pressure, allowing for smooth fuel flow in the injection system and improving the atomization of fuel for better combustion efficiency.
3）Cooling Function:
The fuel pump also provides a cooling effect during operation, helping to reduce fuel temperature and prevent overheating.
Performance Requirements for FKM Rubber Seals
In order to meet the new emission regulations, low-temperature fluororubber and high fluorine content fluororubber materials are needed for fuel pump appilication for less leakage of the fuel.Here are the main performance requirements for FKM rubber seals:
1) Chemical Resistance:
FKM rubber must have excellent resistance to fuels and other chemicals to prevent seal failure.
2) Temperature Resistance: FKM rubber should be capable of operating in a wide temperature range, typically from -40°C to +90°C , to meet the demands of the engine and fuel pump environment.
Components in Fuel Pumps that Require Rubber O-Rings
Rubber O-rings are primarily needed in the following components of fuel pumps:
1) Pump Body Sealing
O-rings are used to seal the pump body, preventing fuel leakage.
2）Inlet and Outlet Interfaces
O-rings are utilized at the fuel pump's inlet and outlet interfaces to ensure a tight seal and prevent leakage.
3）Filter Connections
O-rings are used in the connection between the filter and the fuel pump to ensure no leaks occur.
4）Motor and Pump Body Connection
O-rings may also be used in the connection between the motor and pump body to provide necessary sealing.
FKM rubber seals are key components that ensure the fuel pump operates correctly. Choosing the right grade FKM rubber seal is crucial for enhancing fuel pump performance.
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