EXPERIMENTS ON CYLINDER PRESSURE PULSATION AND DISTRIBUTION IN A SWIRL-CHAMBER-TYPE AUTOMOTIVE DIESEL ENGINE: IDLING KNOCKING NOISE INDUCED BY NON-UNIFORMLY DISTRIBUTED CYLINDER PRESSURE PULSATION
The generation mechanism of the knocking-like, characteristic engine noise in a swirl-chamber-type, automotive engine was investigated. This characteristic engine noise was particularly dominant in cold weather and at idling conditions. It was found that in cold weather, cylinder pressure pulsations of significant amplitude can be induced in the main chamber by the cavity resonance of the swirl chamber and throat, but the pulsations distribute non-uniformly on the piston top surfaces. Collisons between the pistons and the cylinder liners were induced by the pulsating, non-uniformly distributed cylinder pressure, therefore engine structure noise was generated.
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Supplemental Notes:
- A Worldwide View of Diesel Combustion Emissions and Analysis, P-130. International Off-Highway Meeting and Exposition Milwaukee, Wisconsin, September 12-15, 1983.
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- Okamura, H
- Furubayashi, M
- Publication Date: 1983-9
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 137-149
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Serial:
- Publication of: Arbetarskyddsfonden
- Publisher: Arbetarskyddsfonden
Subject/Index Terms
- TRT Terms: Diesel engines; Engine idling; Engine knock; Pistons; Pulses
- Old TRIS Terms: Cylinder pressure; Idling; Pulsation; Swirl chambers
- Subject Areas: Safety and Human Factors;
Filing Info
- Accession Number: 00382409
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Files: HSL, USDOT
- Created Date: Mar 30 1984 12:00AM