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Combustion Noise from High Speed Direct Injection Diesel Engines
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English
Abstract
A simple technique has been developed for measuring the noise radiated by diesel engine surfaces in response to combustion excitation. Results using this technique correlate well with the established computer-based analysis technique. Combustion noise measurements from a direct injection engine show increases of 3dB(A) as fuel cetane number is reduced from 50 to 40CN. Combustion noise in high speed direct injection engines is much greater than in comparable indirect injection engines, and a fundamental study is described which indicates the rate of heat release diagrams required to minimise and optimise combustion noise. This work is supported by engine results with pilot injection which gave reductions of 5 to 8dB(A).
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Authors
Citation
Russell, M. and Haworth, R., "Combustion Noise from High Speed Direct Injection Diesel Engines," SAE Technical Paper 850973, 1985, https://doi.org/10.4271/850973.Also In
References
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- Herbert A J Russell M F “Measurement of Combustion Noise in Diesel Engines” Mech Eng Tech (I Mech E) April 1982 34 39
- Head H E Wake J D “Noise of Diesel Engines under Transient Conditions” SAE Paper 800404 Soc. Auto. Engrs. Congress Detroit Feb 1980
- Head H E Wake J D “Noise made by Direct Injection Engines as they Accelerate” Proc (UK) Inst of Acoustics 1981 Meeting
- Lyn W T “Calculations of the Effect of Rate of Heat Release on the Shape of Cylinder Pressure and Cycle Efficiency” Proc Auto. Dir. I.Mech.E. 1960-61 1 34 62
- Russell M F “Recent CAV Research into Noise Emissions and Fuel Economy of Diesel Engines” SAE Paper 770257 Soc. Auto Engrs. Int. Congress Detroit Feb 1977