This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Automotive Diesel Engine Noise and Its Control
Annotation ability available
Sector:
Language:
English
Abstract
There is now a growing interest in every means of reducing the noise of current diesel engines and designing even quieter engines for the future, perhaps as awareness of noise as a social problem becomes widespread. This paper discusses the production of engine noise, its transmission through the structure, and its subsequent radiation as a sequence of events.
Diesel engine noise can originate from several mechanical sources such as piston slap, timing gear rattle, etc. as well as from the sharp rise in cylinder pressure which attends combustion. The relative importance of these sources is affected by clearances between the working parts which are dictated by design and manufacturing constraints. If reduction of noise at source is contemplated, it is necessary to diagnose which of these sources are primarily responsible for the noise, bearing in mind that the relative importance of the sources varies with engine load and speed. The diagnosis of sources can be based upon measurements of combustion spectra at various engine conditions.
Engine noise may be reduced either at source or by reducing the vibration of the external surfaces of the engine. If reduction of noise by treatment of the surface panels and covers is contemplated, it is generally necessary to treat all the thin section areas (for example, crankcase, water jacket, sump, valve gear covers, etc.). However it is useful to be able to locate any areas which do not contribute significantly to the overall noise. Techniques to find the important noise-radiating areas of the engine surface are discussed prior to a brief consideration of noise reduction measures.
Recommended Content
Journal Article | Sources of UHC Emissions from a Light-Duty Diesel Engine Operating in a Partially Premixed Combustion Regime |
Ground Vehicle Standard | Overcenter Clutch Spin Test Procedure |
Technical Paper | Recovery of Fault Signatures in Diesel Engines |
Authors
Topic
Citation
Russell, M., "Automotive Diesel Engine Noise and Its Control," SAE Technical Paper 730243, 1973, https://doi.org/10.4271/730243.Also In
References
- Austen A. E. W. Priede T. “Noise of Automotive Diesel Engines: Its Causes and Reduction.” SAE Transactions 74 1966 paper 650165
- Priede T. Grover E. C. Lalor N. “Relation between Noise and Basic Structure Vibration of Diesel Engines.” Paper 690450 presented at SAE Mid-Year Meeting Chicago May 1969
- Thien G. E. Paper 1/63 presented to 14th FISITA Congress London June 1972
- Ungar E. E. Ross D. “Piston Slap as a Source of Engine Noise.” ASME paper 65-OGP-10 1965
- Laws A. M. Parker D. A. Turner B. “Piston Movement as a source of Engine Noise.” Paper 1/29 presented to the 14th FISITA Congress London June 1972
- Ungar E. E. Ross D. “Vibrations and Noise due to Piston Slap in Reciprocating Machinery.” Journal of Sound and Vibration 2 2 1965 132 146
- Russell M. F. “Reduction of Noise Emissions from Diesel Engine Surfaces.” Paper 720135 presented at SAE Automotive Engineering Congress Detroit January 1972
- Khan I. M. “Factors Affecting Emissions of Smoke, Gaseous Pollutants from Direct Injection Diesel Engines and a Method of Calculation.” Paper 730169 presented at SAE Automotive Engineering Congress Detroit January 1973