Bosch Overflow Valve F00N200798

A fuel pressure relief valve in a car is a critical component of the fuel delivery system. It is designed to regulate and control the pressure of fuel that is being supplied to the engine. The primary function of the relief valve is to prevent excessive pressure build-up within the fuel system, which can lead to various issues such as fuel leaks, damaged fuel lines, or even engine damage.

The fuel pressure relief valve works by sensing the pressure inside the fuel rail and opening when the pressure exceeds a certain threshold. When this happens, the valve allows excess fuel to bypass back to the fuel tank, relieving the pressure and maintaining a safe operating range. This ensures that the fuel supply to the engine remains consistent and prevents any potential damage or malfunction caused by high pressure.