Roller sliding in engine valve train: Effect of oil film thickness considering lubricant composition

Journal article

Muhammad Khurram, Riaz Ahmad Mufti, Muhammad Usman Bhutta, Naqash Afzal, Muhammad Usman Abdullah, Sami ur Rahman, Saif ur Rehman, Rehan Zahid, Khalid Mahmood, Mian Ashfaq and Muhammad Umar 2020. Roller sliding in engine valve train: Effect of oil film thickness considering lubricant composition. Tribology International. https://doi.org/https://doi.org/10.1016/j.triboint.2019.06.022
AuthorsMuhammad Khurram, Riaz Ahmad Mufti, Muhammad Usman Bhutta, Naqash Afzal, Muhammad Usman Abdullah, Sami ur Rahman, Saif ur Rehman, Rehan Zahid, Khalid Mahmood, Mian Ashfaq and Muhammad Umar
Abstract

In roller follower valve train, proper rolling of roller reduces the chances of fatigue failure and power losses. During engine operation, the roller does slip on the camshaft surface. The oil film thickness plays an important role on the roller sliding which necessitates experimental investigations.

A modern gasoline engine valve train has been instrumented using advanced sensors for real time measurement of oil film thickness and roller slip, simultaneously. Rise in oil film thickness at cam/roller interface increased the tendency of roller slip. Drag due to shear of lubricant and rise in contact loading at very high camshaft speeds resulted in reduction of roller sliding. Presence of anti-wear agents and friction modifiers increased the tendency of roller sliding.

KeywordsCam-roller interface ; Roller slip; Oil film thickness; Lubricant formulation; Cam operating cycle
Year2020
JournalTribology International
PublisherElsevier
ISSN0301-679X
Digital Object Identifier (DOI)https://doi.org/https://doi.org/10.1016/j.triboint.2019.06.022
Official URLhttps://www.sciencedirect.com/science/article/pii/S0301679X19303366
Publication dates
Online11 Jun 2020
Publication process dates
Accepted10 Jun 2019
Deposited27 Jul 2023
Output statusPublished
Permalink -

https://repository.canterbury.ac.uk/item/951v9/roller-sliding-in-engine-valve-train-effect-of-oil-film-thickness-considering-lubricant-composition

  • 84
    total views
  • 0
    total downloads
  • 1
    views this month
  • 0
    downloads this month

Export as

Related outputs

Experimental investigation of engine valve train friction considering effects of operating conditions and WPC surface treatment
Muhammad Usman Bhutta, Muhammad Huzaifa Najeeb, Muhammad Usman Abdullah, Samiur Rahman Shah, Muhammad Khurram, Riaz Ahmad Mufti, Kiyotaka Ogawa, Jawad Aslam, Rehan Zahid, Mian Ashfaq Ali and Muazzam Arshad 2023. Experimental investigation of engine valve train friction considering effects of operating conditions and WPC surface treatment. Materials. https://doi.org/10.3390/ma16093431
Corrosion mechanisms of 304L NAG in boiling 9M HNO3 containing Cr (VI) ions
Shagufta Khan, Adil Saeed, Mian Hammad Nazir, Muhammad Usman Abdullah and Zulfiqar Ahmad Khan 2023. Corrosion mechanisms of 304L NAG in boiling 9M HNO3 containing Cr (VI) ions. Sustainability. 15 (2), p. 916. https://doi.org/10.3390/su15020916
A multiscale overview of modelling rolling cyclic fatigue in bearing elements
Abdullah, U. and Khan, Z.A. 2022. A multiscale overview of modelling rolling cyclic fatigue in bearing elements. Materials. 15 (17), p. 5885. https://doi.org/10.3390/ma15175885
Further investigations and parametric analysis of microstructural alterations under rolling contact fatigue
Abdullah, U. and Khan, Z.A. 2022. Further investigations and parametric analysis of microstructural alterations under rolling contact fatigue. Materials. 15 (22), p. 8072. https://doi.org/10.3390/ma15228072
Friction and wear performance evaluation of bio-lubricants and DLC coatings on cam/tappet interface of internal combustion engines
Rehan Zahid, Muhammad Usman Bhutta, Riaz Ahmad Mufti, Muhammad Usman Abdullah, Haji Hassan Masjuki, Mahendra Varman, Muhammad Abul Kalam, Mian Ashfaq Ali, Jawad Aslam and Khalid Akhtar 2021. Friction and wear performance evaluation of bio-lubricants and DLC coatings on cam/tappet interface of internal combustion engines. Materials. 14 (23), p. 7206. https://doi.org/10.3390/ma14237206
Development of white etching bands under accelerated rolling contact fatigue
Muhammad U. Abdullah, Zulfiqar A. Khan, Wolfram Kruhoeffer, Toni Blass and Bernd Vierneusel 2021. Development of white etching bands under accelerated rolling contact fatigue. Tribology International. 164, p. 107240. https://doi.org/10.1016/j.triboint.2021.107240
Evaluation of dark etching regions for standard bearing steel under accelerated rolling contact fatigue
Muhammad U. Abdullah, Zulfiqar A. Khan and Wolfram Kruhoeffer 2020. Evaluation of dark etching regions for standard bearing steel under accelerated rolling contact fatigue. Tribology International. 152, p. 106579. https://doi.org/10.1016/j.triboint.2020.106579
A 3D finite element model of rolling contact fatigue for evolved material response and residual stress estimation
Muhammad U Abdullah, Zulfiqar A Khan, Wolfram Kruhoeffer and Toni Blass 2020. A 3D finite element model of rolling contact fatigue for evolved material response and residual stress estimation. Tribology Letters. 66 (122). https://doi.org/10.1007/s11249-020-01359-w
Tribological characteristics comparison of formulated palm trimethylolpropane ester and polyalphaolefin for cam/tappet interface of direct acting valve train system
Rehan Zahid, Masjuki Hj. Hassan, Abdullah Alabdulkarem, Mahendra Varman, Md Abul Kalam, Riaz Ahmad Mufti, Nurin Wahidah Mohd Zulkifli, Mubashir Gulzar, Muhammad Usman Bhutta, Mian Ashfaq Ali, Usman Abdullah and Robiah H Yunus 2018. Tribological characteristics comparison of formulated palm trimethylolpropane ester and polyalphaolefin for cam/tappet interface of direct acting valve train system. Industrial Lubrication and Tribology. https://doi.org/10.1108/ILT-06-2017-0156
Benefits of wonder process craft on engine valve train performance
M Usman Abdullah, Samiur Rahman Shah, M Usman Bhutta, Riaz Ahmad Mufti, Muhammad Khurram, M Huzaifa Najeeb, Waseem Arshad and Kiyo Ogawa 2018. Benefits of wonder process craft on engine valve train performance. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 233 (5), pp. 1125-1135. https://doi.org/10.1177/0954407018760935
Technique developed to study camshaft and tappet wear on real production engine
Waseem Arshad, Muhammad Adnan Hanif, Muhammad Usman Bhutta, Riaz Ahmad Mufti, Samiur Rahman Shah, Muhammad Usman Abdullah and Muhammad Huzaifa Najeeb 2017. Technique developed to study camshaft and tappet wear on real production engine. Industrial Lubrication and Tribology. 69 (2), pp. 174-181. https://doi.org/10.1108/ILT-06-2016-0135