AFFECTING DIESEL ENGINE NOISE BY THE PISTON
Since it is not possible to measure piston noises at their origin this paper deals with the methods of affecting the piston movements and the impact of the piston, as it hits the cylinder wall, by means of measurements with pistons whose pins are not offset i.e. on which the axis of piston and pin coincide. Moreover measurements are described with positively and negatively offset pins, whereby the pin axis is slightly displaced with respect to the piston axis. After describing various designs of pistons with controlled thermal expansion and of the articulated piston, which allows to reduce the fitting clearance as compared with one-piece full-skirt pistons, this paper reports on noise measurements with such pistons and on the influence of skirt coatings on piston noise.
- Proceedings from the Diesel Engine Noise Conference, SP-397.
Warrendale, PA United States 15096
- Rohrle, M D
- Publication Date: 1975-8
- Pagination: p. 51-67
- TRT Terms: Acoustic measuring instruments; Acoustics; Automotive engineering; Diesel engines; Engines; Noise; Noise control; Pistons (Engines)
- Old TRIS Terms: Acoustic measurement; Engine noise
- Subject Areas: Environment; Highways; Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00133468
- Record Type: Publication
- Report/Paper Numbers: SAE #750799 Proceeding
- Files: TRIS
- Created Date: Jun 5 1976 12:00AM