A diesel engine equipped with a high-pressure common rail (HPCR) fuel system cranks normally but will not start. Which of these could be the cause?

Question

17-05-2025
Engineering

College

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A diesel engine equipped with a high-pressure common rail (HPCR) fuel system cranks normally but will not start. Which of these could be the cause?

Answer :

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DavidWilson78 DavidWilson78 · Answer 1 · 2025-04-08T21:19:54-04:00

Final answer:

A diesel engine with a high-pressure common rail fuel system may fail to start due to issues with the fuel delivery system, poor fuel quality, a failing ignition system, or mechanical faults with the engine itself.

Explanation:

If a diesel engine with a high-pressure common rail (HPCR) fuel system cranks normally but will not start, several factors could be the cause. One, issues with the fuel delivery system, such as blockages or leaks, could prevent the diesel fuel from reaching the engine properly. Two, the diesel fuel itself may be contaminated or of poor quality, which can prevent efficient ignition. Three, the ignition system, which is responsible for compressing the air in the cylinder to a temperature above the ignition temperature of the fuel, might be failing.

Additionally, mechanical faults with the engine itself, such as problems with the formation of the ideal diesel cycle, could prevent the engine from starting. Reminder that the ideal diesel cycle consists of five strokes including intake, compression, power, exhaust, and additional exhaust. Correct identification and rectification of the underlying issue are necessary to get the diesel engine running again.

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