SOME NEW RESULTS CONCERNING PARAMETERS INFLUENCING PISTON SLAP IN RECIPROCATING MACHINERY

Oil film pressure was measured on the surface of the piston skirt throughout the cycle and its relationship to piston movement investigated. The effects of piston ring installation conditions and offset of the gudgeon pin on cylinder wall vibration were also experimentally studied. Oil film pressure had a significant effect on piston movement, particularly on the motion of the lower part of the piston skirt. It was concluded that sufficient oil injection may prevent piston slap, a major source of noise in diesel engines. Ring-groove friction was found to slow piston movement and thus decrease piston-slap-induced vibrations. Offset of the gudgeon pin to the nonthrust side reduced the piston slap just after top dead center.

• Supplemental Notes:
  • Also published in HS-029 137 (IMechE-CP-1979-10), "Noise and Vibrations of Engines and Transmissions," Bury St. Edmunds, 1979 pp 33-8. Presented at conference, Cranfield Institute of Technology, England, 10-12 July 1979.
• Corporate Authors:

  Institution of Mechanical Engineers

  1 Birdcage Walk
  London SW1H 9JJ,   England 

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Fujimoto, Yuusuke
  • Suzuki, T
  • Ochiai, Y
• Publication Date: 1979

Media Info

• Features: References;
• Pagination: p. 33-38

Subject/Index Terms

• TRT Terms: Diesel engines; Motion; Noise; Pistons
• Subject Areas: Environment; Safety and Human Factors;

Filing Info

• Accession Number: 00386098
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: IMechE-C120/79, HS-029 142, SAE-MEP-109
• Files: HSL, USDOT
• Created Date: Jun 28 1984 12:00AM