Cylinder pressure generated noise of medium speed diesel engine

Lasse Lamula, Kari P. Saarinen, Johannes Hyrynen, Kari Saine

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Ranking of noise generation mechanisms is essential for designing low noise diesel engines. Engine noise is caused by several excitations or sources of noise, such as combustion, turbo charger, piston slap, valve mechanism, fuel pumps, gears and inertia forces. Noise generated by the cylinder pressure was studied using multipoint coherent power analysis. Cylinder pressure probes were mounted in all cylinders. Partial coherence functions were used to analyze the contribution of the cylinder pressures to the measured engine surface velocities. The effect of different fuels, diesel and gas, was studied comparing cylinder pressures and measured vibrations and sound power levels. It is already known that a gas engine is more silent than a similar diesel engine. The reasons for the disparity are differences in combustion processes and absence of the fuel pumps in gas engines. The fuel pump causes impulsive excitations via the cam shaft to the driving gear. The importance of these phenomena was studied using a dual fuel engine.
Original languageEnglish
Title of host publicationProceedings of Joint Baltic-Nordic Acoustics Meeting 2008
Subtitle of host publicationAbstracts and Papers
Place of PublicationReykjavik
Publication statusPublished - 2008
MoE publication typeB3 Non-refereed article in conference proceedings
EventJoint Baltic-Nordic Acoustics Meeting 2008, BNAM - Reykjavik, Iceland
Duration: 17 Aug 200819 Aug 2008

Conference

ConferenceJoint Baltic-Nordic Acoustics Meeting 2008, BNAM
Abbreviated titleBNAM
CountryIceland
CityReykjavik
Period17/08/0819/08/08

Fingerprint

Engine cylinders
Diesel engines
Fuel pumps
Gas engines
Gears
Dual fuel engines
Engines
Shafts (machine components)
Gas fuels
Cams
Diesel fuels
Pistons
Vibrations (mechanical)
Acoustic waves

Keywords

  • engine noise
  • cylinder pressure

Cite this

Lamula, L., Saarinen, K. P., Hyrynen, J., & Saine, K. (2008). Cylinder pressure generated noise of medium speed diesel engine. In Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008: Abstracts and Papers Reykjavik.
Lamula, Lasse ; Saarinen, Kari P. ; Hyrynen, Johannes ; Saine, Kari. / Cylinder pressure generated noise of medium speed diesel engine. Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008: Abstracts and Papers. Reykjavik, 2008.
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title = "Cylinder pressure generated noise of medium speed diesel engine",
abstract = "Ranking of noise generation mechanisms is essential for designing low noise diesel engines. Engine noise is caused by several excitations or sources of noise, such as combustion, turbo charger, piston slap, valve mechanism, fuel pumps, gears and inertia forces. Noise generated by the cylinder pressure was studied using multipoint coherent power analysis. Cylinder pressure probes were mounted in all cylinders. Partial coherence functions were used to analyze the contribution of the cylinder pressures to the measured engine surface velocities. The effect of different fuels, diesel and gas, was studied comparing cylinder pressures and measured vibrations and sound power levels. It is already known that a gas engine is more silent than a similar diesel engine. The reasons for the disparity are differences in combustion processes and absence of the fuel pumps in gas engines. The fuel pump causes impulsive excitations via the cam shaft to the driving gear. The importance of these phenomena was studied using a dual fuel engine.",
keywords = "engine noise, cylinder pressure",
author = "Lasse Lamula and Saarinen, {Kari P.} and Johannes Hyrynen and Kari Saine",
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booktitle = "Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008",

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Lamula, L, Saarinen, KP, Hyrynen, J & Saine, K 2008, Cylinder pressure generated noise of medium speed diesel engine. in Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008: Abstracts and Papers. Reykjavik, Joint Baltic-Nordic Acoustics Meeting 2008, BNAM, Reykjavik, Iceland, 17/08/08.

Cylinder pressure generated noise of medium speed diesel engine. / Lamula, Lasse; Saarinen, Kari P.; Hyrynen, Johannes; Saine, Kari.

Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008: Abstracts and Papers. Reykjavik, 2008.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

TY - GEN

T1 - Cylinder pressure generated noise of medium speed diesel engine

AU - Lamula, Lasse

AU - Saarinen, Kari P.

AU - Hyrynen, Johannes

AU - Saine, Kari

N1 - Project code: 13756

PY - 2008

Y1 - 2008

N2 - Ranking of noise generation mechanisms is essential for designing low noise diesel engines. Engine noise is caused by several excitations or sources of noise, such as combustion, turbo charger, piston slap, valve mechanism, fuel pumps, gears and inertia forces. Noise generated by the cylinder pressure was studied using multipoint coherent power analysis. Cylinder pressure probes were mounted in all cylinders. Partial coherence functions were used to analyze the contribution of the cylinder pressures to the measured engine surface velocities. The effect of different fuels, diesel and gas, was studied comparing cylinder pressures and measured vibrations and sound power levels. It is already known that a gas engine is more silent than a similar diesel engine. The reasons for the disparity are differences in combustion processes and absence of the fuel pumps in gas engines. The fuel pump causes impulsive excitations via the cam shaft to the driving gear. The importance of these phenomena was studied using a dual fuel engine.

AB - Ranking of noise generation mechanisms is essential for designing low noise diesel engines. Engine noise is caused by several excitations or sources of noise, such as combustion, turbo charger, piston slap, valve mechanism, fuel pumps, gears and inertia forces. Noise generated by the cylinder pressure was studied using multipoint coherent power analysis. Cylinder pressure probes were mounted in all cylinders. Partial coherence functions were used to analyze the contribution of the cylinder pressures to the measured engine surface velocities. The effect of different fuels, diesel and gas, was studied comparing cylinder pressures and measured vibrations and sound power levels. It is already known that a gas engine is more silent than a similar diesel engine. The reasons for the disparity are differences in combustion processes and absence of the fuel pumps in gas engines. The fuel pump causes impulsive excitations via the cam shaft to the driving gear. The importance of these phenomena was studied using a dual fuel engine.

KW - engine noise

KW - cylinder pressure

M3 - Conference article in proceedings

BT - Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008

CY - Reykjavik

ER -

Lamula L, Saarinen KP, Hyrynen J, Saine K. Cylinder pressure generated noise of medium speed diesel engine. In Proceedings of Joint Baltic-Nordic Acoustics Meeting 2008: Abstracts and Papers. Reykjavik. 2008