The effect of damage to the fuel injector on changes of the vibroactivity of the diesel engine during its starting

Damage to fuel system components of combustion engines significantly contributes to the deterioration of their operation dynamics, accelerates their wear and worsens the emission of toxic components of exhaust fumes. Measurements and calculations of the level of vibration and noise of a diesel engine with a damaged common rail system injector were conducted as part of the study. The impact of damage to the fuel system injector on the change in the vibroactivity of the engine during its starting was evaluated based on the calculations carried out. Time and frequency distributions of signals of vibration and noise were also calculated in order to evaluate the impact of the injection system damage on the frequency structure of vibroacoustic signals emitted by the engine.