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Impact of the cam and follower cooperation and of lubrication on the cam wear

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Purpose: The paper provides an analysis of the reasons for excessive wear of the cam/follower system components based on physical and mathematical models developed to describe the impact of selected material, technological and operational factors. Owing to the comparison between the calculation results obtained and the actual cam wear values, it was possible to asses the correctness of the wear models taken into consideration. Design/methodology/approach: The research in question included preparation of a mathematical cam wear model developed by way of dimensional analysis as well as finite element (FEM) based structural models for a cam/follower system. The aforementioned FEM models were noted in a parametrical form using macro commands of the COSMOS/M system, and hence it was possible to analyse contact problems in various cam positions and change the selected analytical parameters (e.g. dimensions, material parameters). Findings: The main reasons for excessive cam wear include inferior quality of the cam and follower frictional couple lubrication as well as edge-type cooperation between the cam and the cam follower. At the same time, a significant impact on the wear is exerted by hardness of the cam and its follower. Research limitations/implications: Wear of cams and cam followers operating in timing gear systems of vehicle combustion engines takes place as an effect of friction occurring in presence of lubricant. During standard operation, components of the cam/follower system may be subject to an excessive or accelerated wear process. This study is an attempt to establish the reasons for this phenomenon to occur in order to control such cases. Originality/value: In order to counteract the phenomenon of accelerated wear of cams, one should consider increasing the required hardness of their working surfaces.
Słowa kluczowe
Rocznik
Strony
158--163
Opis fizyczny
Bibliogr. 11 poz.
Twórcy
autor
  • Faculty of Transport, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland
autor
  • Faculty of Transport, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland
  • Faculty of Transport, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland
autor
  • Faculty of Transport, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland
autor
  • Faculty of Transport, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland
autor
  • Faculty of Transport, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland
Bibliografia
  • [1] J. Cypko, E. Cypko, Fundamentals of technology and organisation of mechanical vehicle repair, WKŁ, Warsaw, 1989 (in Polish).
  • [2] W. Zwierzycki et al., Selected aspects of material wear in slide friction pairs, PWN, Warsaw-Poznań, 1990 (in Polish).
  • [3] A. Ciesiołkiewicz, S. Postrzednik, Study and analysis of service wear of camshaft cams in combustion engines, Proceedings of the International Conference TRANSPORT‘97 Ostrava-Katowice (1997) 93-100 (in Polish).
  • [4] E. Tasak, Analysis of the reasons for camshaft defects, research no. M-1/707/93, “TECHMATEKS” Office of Expertise and Technical Consulting, Cracow, 1993 (in Polish).
  • [5] R. Janik, J. Winogrodzki, A. Dziendziel, Analysis of the phenomenon of excessive wear of camshafts and valve lifters in type 170A.000 used in Cinquecento, OBR/698/BH/162/93, Research and Development Centre for Compact Cars, Bielsko-Biała, 1993 (in Polish).
  • [6] A. Suchecki, J. Bobrek, Study of wear of camshaft cams in type 170A.046 engines (CC 704 cm3) in accordance with the B.001 research standard of 22 July 1992, OBR/1208/BH/189/96, Research and Development Centre\ for Compact Cars, Bielsko-Biała, 1996 (in Polish).
  • [7] S. Rigoni, G. Ariaudo, Diagnosi anomalia in clientele (usura): Albero distribuzione - punterie, Modello Micro 704, 095/93, Fiat Auto S.p.A., 1993.
  • [8] G. Siwiec, J. Botor, B. Machulec, The surface tension determination through the estimation of the parameters of the sessile drop equation, Archives of Metallurgy 48/2 (2003) 209-221.
  • [9] B. Oleksiak, G. Siwiec, A. Blacha, J. Lipart, Influence of iron on the surface tension of copper, Archives of Materials Science and Engineering 44/1 (2010) 39-42.
  • [10] R. Burdzik, Z. Stanik, J. Warczek, Method of assessing the impact of material properties on the propagation of vibrations excited with a single force impulse, Archives of Materials and Metallurgy 57/2 (2012) 409-416.
  • [11] L. Blacha, Untersuchungen der antimon entfernungs geschwindigkeit aus blisterkupfer im prozess der vakuumraffination, Archives of Materials Science and Engineering 50/4 (2005) 989-1002.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-3ec9f347-58ef-495b-a3b0-b05ccf098cbf
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