Exam Question

Fuel injectors are critical components in a marine diesel engine, responsible for atomizing and injecting fuel into the combustion chamber at precisely the right time and pressure. Their continuous operation under extreme conditions of high pressure, high temperature, and corrosive combustion by-products inevitably leads to deterioration over time. Understanding this deterioration, its effects, and the tell-tale signs is crucial for maintaining engine efficiency, reliability, and safety.
**(a) Describe how fuel injector components deteriorate with time? (6 marks)**
Deterioration of fuel injector components is a cumulative process influenced by operational stress, fuel quality, and maintenance practices. The primary components susceptible to deterioration include the nozzle tip, needle valve, valve seat, and spring.
* **Nozzle Tip Erosion and Corrosion:**