Noise of Diesel Engines Under Transient Conditions

Diesel engines accelerating under full load conditions radiate more noise from their surfaces than when they are run at steady speed with the same fuelling. This is particularly marked in urban driving conditions as engines are accelerated after running for long periods at idling or at part load, wh...

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Bibliographic Details
Published in:SAE transactions 1980-01, Vol.89, p.1589-1597
Main Authors: Head, H. E., Wake, J. D.
Format: Article
Language:English
Subjects:
Combustion
Combustion temperature
Cylinders
Diesel engines
Engine noise
Engines
Fuel combustion
Ignition
Noise temperature
Pistons
Online Access:Get full text
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Summary:Diesel engines accelerating under full load conditions radiate more noise from their surfaces than when they are run at steady speed with the same fuelling. This is particularly marked in urban driving conditions as engines are accelerated after running for long periods at idling or at part load, when the inlet manifold and piston temperatures are lower than they are at steady speed full load conditions. The work reported in this paper shows that the increase in noise originating from the combustion process is due to the lower temperature of the air charge. It is also shown how mechanical noise from piston slap increases under acceleration conditions.
ISSN:0096-736X
2577-1531