scholarly journals Prototype model of diesel engine vibration and noise generation

1981 ◽  
Vol 69 (S1) ◽  
pp. S87-S87
Author(s):  
Allan D. Pierce ◽  
Emillos Dimitriadis
Keyword(s):  
Diesel Engine ◽  
Prototype Model ◽  
Noise Generation ◽  
Engine Vibration

scholarly journals Diesel engine vibration monitoring based on a statistical model

2018 ◽  
Vol 211 ◽  
pp. 03007
Author(s):  
Suzana Lampreia ◽  
José Requeijo ◽  
Victor Lobo
Keyword(s):  
Diesel Engine ◽  
Statistical Model ◽  
Environmental Conditions ◽  
Control Charts ◽  
Vibration Monitoring ◽  
Fuel Quality ◽  
Sea State ◽  
Engine Vibration ◽  
The Right ◽  
Engine Power

There are various causes for vibrations on diesel engines. The engine vibrations depend not only on the present state of the engine, but also on the fuel quality, the environmental conditions (sea state in the case of shipborne engines), type of casing, other equipment in the vicinity, etc. The engines used for this study are installed aboard a ship, and the main aim is to use modified control charts to assess the condition of the engine and recommend corrective measures when necessary. An important issue to do this correctly is choosing the right places to measure vibration. The collected data is vibration at various engine power levels, measured at various points. The engine’s fault history is taken into consideration, but proved to be almost irrelevant. By using modified control charts, the engine vibrations can be estimated, and faults can be detected and classified so as to take corrective actions. In this study we followed a methodology that is slightly different from our previous work, and achieved good results.

Identification of Mechanical Sources of Noise in a Diesel Engine: Sound Emitted from the Valve Mechanism

1966 ◽  
Vol 181 (1) ◽  
pp. 437-451 ◽  
Author(s):  
B. J. Fielding ◽  
J. Skorecki
Keyword(s):  
Diesel Engine ◽  
Vibration Analysis ◽  
Noise Signal ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Single Frequency ◽  
Noise Generation ◽  
Valve Mechanism ◽  
Standard Methods ◽  
Valve Gear

The sound emitted from the valve mechanism of a diesel engine was investigated by standard methods of sound and vibration analysis augmented by correlation of incidence of individual transient components. This latter technique makes use of information obtained from the tuned output of the noise signal focusing attention on the incidence of single-frequency transients. Three distinct sources of noise were exposed: valve-gear transmission mechanism, valve impact, and the flow of air through the valve gaps. The characteristics, relative contributions, and effects of these sources are discussed in detail, and insight is gained into the mechanism of noise generation and radiation.

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