CAVITATION IN THE FUEL INJECTION SYSTEM OF A DIESEL ENGINE AND ITS PREVENTION

Cavitation erosion recently experienced in a fuel injection system of a highly rated diesel engine greatly deteriorates the engine performance and reliability. The cavitation phenomena in a high pressure line and feed line of fuel injection system were investigated theoretically and experimentally. New methods of eliminating cavitation are proposed. The results of the investigation are summarized as follows: (1) Cavitation in high pressure line in a fuel injection system is mainly caused by the excess retraction capacity of a delivery valve of the fuel injection pump and by the excess area of the fuel injection nozzle. (2) The usual methods for eliminating cavitation in the high pressure line are liable to cause a secondary injection. (3) For eliminating cavitation as well as a secondary injection, it is necessary to control the retraction velocity of the delivery valve adequately. (4) Cavitation in the feed line of a fuel injection system is caused by a negative pressure wave in the line and the very high speed of the spill flow through the spill port from the plunger chamber of the injection pump.

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  • Corporate Authors:

    Mitsubishi Heavy Industries Limited

    5-1 Marunouchi, 2-chome, Chiyoda-Ku
    Tokyo 100,   Japan 
  • Authors:
    • Tateishi, M
    • Fukuyoshi, T
    • Nagae, Y
  • Publication Date: 1974-10

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Filing Info

  • Accession Number: 00080062
  • Record Type: Publication
  • Source Agency: Mitsubishi Heavy Industries Limited
  • Report/Paper Numbers: Series No. 31
  • Files: TRIS
  • Created Date: May 1 1975 12:00AM