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What is the purpose of the fuel pressure regulator in a common rail fuel system?

A. To return unused fuel to the tank
B. To regulate the fuel pressure delivered to the injectors
C. To pressurize the fuel for injection
D. To store excess fuel for future use

Answer :

Final answer:

The fuel pressure regulator in a common rail fuel system regulates the fuel pressure delivered to the injectors to ensure proper engine function.

Explanation:

The purpose of the fuel pressure regulator in a common rail fuel system is to regulate the fuel pressure delivered to the injectors. As a vital part of the fuel system, the regulator controls the amount of pressure of the fuel that is being delivered to the engine. It ensures that the fuel injectors are getting the correct amount of fuel at the necessary pressure. This helps in making the engine run smoothly and efficiently. Incorrect or varying fuel pressure can lead to engine problems, such as poor performance, bogging, and damage to the fuel injectors.

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