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Which is the sensor used to sense the pressure of the common rail?

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in Automotive Engine Design by (137k points)
Which is the sensor used to sense the pressure of the common rail?

(a) Rail pressure sensor

(b) Mass airflow sensor

(c) Oxygen sensor

(d) Thermostat

This question was posed to me by my college director while I was bunking the class.

This key question is from Modern Common Rail Fuel Injection System topic in portion Diesel Engine Fuel Supply System of Automotive Engine Design

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Correct answer is (a) Rail pressure sensor

To explain: The fuel from the fuel tank is pumped by a low-pressure electric fuel pump through a filter, to the high-pressure pump, which builds up the high pressure in the common rail with the help of a pressure regulator valve controlled by ECU through a rail pressure sensor.

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