CORRECTION OF ENGINE PERFORMANCE

The paper discusses the effects on diesel engine performance of ambient temperature, humidity and barometric pressure. The authors make new proposals for the application of correction factors to engine ratings in accordance with atmospheric conditions. They describe experiments made, in A decompression chamber, on seven engines at the Motor Industry Research Association. Results are given relating engine power to fuel consumption and exhaust smoke density for changes in inlet/exhaust air pressure and inlet air temperature. The results are discussed in relation to existing standard correction methods. Two correction methods are proposed: one is based on smoke limited derating, A modification of the method of b.s. 649; the other is A constant fuel rate correction and is given in graphical form. Graphs are also given for water vapour compensation and for correction of exhaust smoke density readings. The ranges of temperatures and pressures covered are those suggested in the new S.A.E. Code J 816. An example is given showing the use of the graphs. /TRRL/

  • Authors:
    • Fosberry, RAC
    • Holubecki, Z
  • Publication Date: 1963-8

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Filing Info

  • Accession Number: 00127762
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 14 1976 12:00AM