CONDITION MONITORING: LONG TERM OR SHORT TERM?

Referring particularly to large Diesel engines, the Author (of Grandi Motori Trieste) emphasises the importance of short-term monitoring. In addition to long-term preventive-maintenance monitoring (in which phenomena such as fuel-nozzle and liner wear develop at a constant rate), there is a real need for monitoring rapidly developing conditions such as piston-ring wear and other "non-linear" phenomena which can lead to failure in a very short time, perhaps in minutes. By far the most important parameter in this short-term monitoring is exhaust-gas temperature, a "cumulative" parameter embracing the fuel-injection equipment, combustion process, value phasing, heat exchangers, and other factors. Other important parameters are bearing temperature and (another cumulative parameter) crankcase over-pressure. These three parameters are briefly discussed, some relevant experiences with engines in service are described, and brief information is given on some monitoring equipment for GMT engines. It is mentioned that, in FIAT-TGMT two-stroke engines, in which the pistons are visible from outside the engine, leaks past the piston rings are easily detected by the presence of smoke puffs; the rings can be inspected through the exhaust ports. Order from: BSRA as No. 47,339.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00366099
• Supplemental Notes:
  • This paper was presented at the Condition Monitoring Conference of ICMES (International Co-operation on Marine Engineering Systems), held in Paris in 1977.
• Corporate Authors:

  Wyt & Zonen B.V.

  Pieter de Hoochweg 111
  Rotterdam,   Netherlands 
• Authors:
  • Mollo, M
• Publication Date: 1977-9-2

Media Info

• Features: References;
• Pagination: 4 p.
• Serial:
  • Schip en Werf
  • Volume: 44
  • ISSN: 0036-6099

Subject/Index Terms

• TRT Terms: Diesel engines; Engines; Monitoring; Piston rings; Vehicle maintenance; Wear
• Uncontrolled Terms: Condition monitoring
• Old TRIS Terms: Diesel maintenance; Diesel monitoring; Engine maintenance; Engine monitoring
• Subject Areas: Maintenance and Preservation; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00173033
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Apr 12 1978 12:00AM