Experimental aspects of a cam-follower contact

  • Giovanni Pugliese
  • Enrico CiulliEmail author
  • Francesco Fazzolari
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)


An experimental apparatus for investigations on cam-follower contacts is briefly described and some results related to a tested cam are presented. The apparatus is able to measure the film thickness and shape using optical interferometry and all components of the contact force through a system of nine annular load cells. The equations for the evaluation of the fundamental kinematic quantities of cam-follower pairs are reported. They are applied to the tested cam for detecting the angular positions of the most interesting conditions, as the points of maximum lift, velocity and acceleration, and the trend of the entraining velocity. The methodologies used for recording by a high speed camera connected to a microscope the interference images for the analysis of the lubricated contact are described. Some sample interference images recorded both at low and high magnification are presented showing the different conditions of the contact during a complete rotation of the cam and the capabilities of the experimental apparatus.


cam-follower experimental apparatus optical interferometry 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Dowson, D., Harrison, P., Taylor CM.: The lubrication of automotive cams and followers. In: Proc. of 12th Leeds–Lyon Symposium, pp. 305–322. Butterworths, Oxford (1986).Google Scholar
  2. 2.
    Bair, S., Griffioen, JA., Winer WO.: The tribological behavior of an automotive cam and flat lifter system. Trans. ASME J Trib. 108, 478–486 (1986).CrossRefGoogle Scholar
  3. 3.
    Soejima, M., Ejima, Y., Wakuri, Y., et al.: Improvement of lubrication for cam and follower. Trib. Trans. 42(4), 755–762 (1999).CrossRefGoogle Scholar
  4. 4.
    Gangopadhyay, A., Soltis, E., Johnson, MD.: Valvetrain friction and wear: Influence of surface engineering and lubricants. Proc. IMechE, Part J 218, 147–156 (2004).CrossRefGoogle Scholar
  5. 5.
    Kano, M.: Super low friction of DLC applied to engine cam follower lubricated with estercontaining oil. Trib. Int. 39, 1682–1685 (2006).CrossRefGoogle Scholar
  6. 6.
    Hamilton, GM.: The hydrodynamic of a cam follower. Trib. Int. 13, 113–119 (1980).CrossRefGoogle Scholar
  7. 7.
    van Leeuwen, H., Meijer, H., Schouten, M.: Elastohydrodynamic film thickness and temperature measurements in dynamically loaded concentrated contacts: Eccentric cam–flat follower. In: Proc. of 13th Leeds–Lyon Symposium, pp. 611–625. Elsevier, Amsterdam (1987).Google Scholar
  8. 8.
    Dowson, D., Harrison, P., Taylor, CM., et al.: Experimental observation of lubricant film state between a cam and bucket follower using the electrical resistivity technique. In: Proc. of Japan international tribology conference, pp. 119–124. Nagoya, Japan (1990).Google Scholar
  9. 9.
    Mufti, RA.: Experimental technique for evaluating valve train performance of a heavy duty diesel engine. Proc. IMechE 223 Part J, 425-436 (2009).CrossRefGoogle Scholar
  10. 10.
    Ciulli, E. , Stadler, K., Draexl, T.: The influence of the slide to roll ratio on the friction co-efficient and film thickness of EHD point contacts under steady state and transient conditions. Trib. Int. 42(4), 526-534 (2009).CrossRefGoogle Scholar
  11. 11.
    Ciulli, E., Draexl, T., Stadler, K.: Film thickness analysis for EHL contacts under steadystate and transient conditions by automatic digital image processing. Advances in tribology, Vol. 2008, Article ID 25187, 16 pages (2008).Google Scholar
  12. 12.
    Ciulli, E., Fazzolari, F., Piccigallo, B.: Experimental study on circular eccentric cam–follower pairs. Proc. Inst. Mech. Eng., Part J 228(10), 1088-1098 (2014).CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Università di PisaPisaItaly
  2. 2.Parker HannifinGessateItaly

Personalised recommendations