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Manufacturing of Ceramic Valve Discs and their Use in a Rotor CAM Engine

  • Jesper Brandt
  • Lars Kahlman
  • Robert Pompe
  • Karl-Erik Lindblad
Chapter

Abstract

Valve discs of Si3N4 to be used as a vital part in a recently developed rotor cam engine have been manufactured. Si3N4 ceramic has been selected because of its combination of high thermal shock resistance, high wear resistance, low friction coefficient and dimensional stability — all these properties being essential to the optimal running function of the engine. The discs have been produced by the NPS (Nitrided Pressureless Sintering)technique. Design, material selection, processing procedure, engine test results as well as further design and processing development will be discussed. The rotor cam engine with the ceramic valve disc assembled has been successfully test run for more than 80 hours.

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References

  1. 1.
    K E Lindblad, Patent, nr 8803791-6, PCT nr SE 89/00582, Sweden.Google Scholar
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    H Ishii, F Honda and K Nakajima, “Effect of Soot Interposed Between the Sliding Ceramic Surfaces”, Proc. Jap. Int. Trib. Conf., Nagoya (1990).Google Scholar
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    R Pompe, L Hermansson and R Carlsson, “Development of Commercially Advantageous Techniques for Fabrication of Low Shrinkage Si3N4-Based Materials”, Sprechsaal 115, 1098–1101 (1982).Google Scholar
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    L K L Falk, R Pompe and G L Dunlop, “Development of Microstructure During the Fabrication of Si3N4 by Nitridation and Pressureless Sintering of Si:Si3N4 Compacts”, J. Mater. Sci., 20, 3445–56 (1985).CrossRefGoogle Scholar
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    J Heinrich, “Nitridation of Silicon under High Pressure”, Adv. Cer. Mat., 2 (3A) 239–242 (1987).Google Scholar

Copyright information

© Elsevier Science Publishers Ltd and MPA Stuttgart 1992

Authors and Affiliations

  • Jesper Brandt
    • 1
  • Lars Kahlman
    • 1
  • Robert Pompe
    • 1
  • Karl-Erik Lindblad
    • 2
  1. 1.Swedish Ceramic Institute (SCI)GöteborgSweden
  2. 2.Kesol Produktion ABAlingsåsSweden

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