کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
560848 | 875206 | 2008 | 16 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Monitoring of diesel engine combustions based on the acoustic source characterisation of the exhaust system Monitoring of diesel engine combustions based on the acoustic source characterisation of the exhaust system](/preview/png/560848.png)
Acoustic methods are among the most useful techniques for monitoring the condition of machines. However, the influence of background noise is a major issue in implementing this method. This paper introduces an effective monitoring approach to diesel engine combustion based on acoustic one-port source theory and exhaust acoustic measurements. It has been found that the strength, in terms of pressure, of the engine acoustic source is able to provide a more accurate representation of the engine combustion because it is obtained by minimising the reflection effects in the exhaust system. A multi-load acoustic method was then developed to determine the pressure signal when a four-cylinder diesel engine was tested with faults in the fuel injector and exhaust valve. From the experimental results, it is shown that a two-load acoustic method is sufficient to permit the detection and diagnosis of abnormalities in the pressure signal, caused by the faults. This then provides a novel and yet reliable method to achieve condition monitoring of diesel engines even if they operate in high noise environments such as standby power stations and vessel chambers.
Journal: Mechanical Systems and Signal Processing - Volume 22, Issue 6, August 2008, Pages 1465–1480