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The Function and Working Principle of Automotive High-Pressure Fuel Pump

1 Answers

DelFrank

07/29/25 5:46pm

The function and working principle of the automotive high-pressure fuel pump are as follows: 1. Function of the high-pressure fuel pump: Its role is to increase the fuel pressure for high-pressure injection to achieve atomization. The main applications of the high-pressure fuel pump are as a power source for hydraulic devices such as jacks, heading machines, extruders, and cotton gins. The fuel outlet of the high-pressure pump enters the oil cooler, and after passing through the oil cooler, it enters the oil filter. From the oil filter, it splits into two paths: one is depressurized for supply, and the other becomes control oil. There may also be one or two accumulators in the oil circuit. 2. Working principle: The high-pressure fuel pump serves as the interface between the high-pressure and low-pressure fuel circuits. Its function is to generate fuel pressure in the common rail by controlling the fuel output. Under all operating conditions, it is primarily responsible for supplying sufficient high-pressure fuel to the common rail.

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