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

Usman Abdullah; Muhammad Khurram; Riaz Ahmad Mufti; Muhammad Usman Bhutta; Naqash Afzal; Sami ur Rahman; Saif ur Rehman; Rehan Zahid; Khalid Mahmood; Mian Ashfaq; Muhammad Umar

doi:10.1016/j.triboint.2019.06.022

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

Usman Abdullah
, Muhammad Khurram
, Riaz Ahmad Mufti
, Muhammad Usman Bhutta
, Naqash Afzal
, Sami ur Rahman
, Saif ur Rehman
, Rehan Zahid
, Khalid Mahmood
, Mian Ashfaq
, Muhammad Umar

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

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.

Original language	English
Journal	Tribology International
DOIs	https://doi.org/10.1016/j.triboint.2019.06.022
Publication status	Published - 11 Jun 2020

Keywords

Cam operating cycle
Cam-roller interface
Lubricant formulation
Oil film thickness
Roller slip

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10.1016/j.triboint.2019.06.022

Cite this

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title = "Roller sliding in engine valve train: Effect of oil film thickness considering lubricant composition",

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.",

keywords = "Cam operating cycle, Cam-roller interface, Lubricant formulation, Oil film thickness, Roller slip",

author = "Usman Abdullah and Muhammad Khurram and Mufti, \{Riaz Ahmad\} and Bhutta, \{Muhammad Usman\} and Naqash Afzal and Rahman, \{Sami ur\} and Rehman, \{Saif ur\} and Rehan Zahid and Khalid Mahmood and Mian Ashfaq and Muhammad Umar",

year = "2020",

month = jun,

day = "11",

doi = "10.1016/j.triboint.2019.06.022",

language = "English",

journal = "Tribology International",

issn = "0301-679X",

publisher = "Elsevier Inc.",

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TY - JOUR

T1 - Roller sliding in engine valve train: Effect of oil film thickness considering lubricant composition

AU - Abdullah, Usman

AU - Khurram, Muhammad

AU - Mufti, Riaz Ahmad

AU - Bhutta, Muhammad Usman

AU - Afzal, Naqash

AU - Rahman, Sami ur

AU - Rehman, Saif ur

AU - Zahid, Rehan

AU - Mahmood, Khalid

AU - Ashfaq, Mian

AU - Umar, Muhammad

PY - 2020/6/11

Y1 - 2020/6/11

N2 - 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.

AB - 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.

KW - Cam operating cycle

KW - Cam-roller interface

KW - Lubricant formulation

KW - Oil film thickness

KW - Roller slip

U2 - 10.1016/j.triboint.2019.06.022

DO - 10.1016/j.triboint.2019.06.022

M3 - Article

SN - 0301-679X

JO - Tribology International

JF - Tribology International

ER -

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

Abstract

Keywords

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