● Operating Principle：It is used to stabilize the working pressure of the rail supply at the vehicle end, so that the oil system at the vehicle end works under a stable working condition.

                                           When the engine is working, the fuel pump provides sufficient fuel to the engine rail, which provides fuel according to the actual demand of the engine. Excess fuel will increase the system pressure, and finally release the pressure through the pressure regulator valve to maintain the fuel injection system within a constant pressure range.

● Applicable Fuels: Diesel, gasoline, gasoline with alcohol medium.