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

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