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

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; Muhammad Umar

doi:10.1016/j.triboint.2019.06.022

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

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, Muhammad Umar

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

12 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
Article number	105829
Journal	Tribology International
Volume	149
DOIs	https://doi.org/10.1016/j.triboint.2019.06.022
Publication status	Published - Sept 2020

Bibliographical note

Publisher Copyright:
© 2019

Keywords

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

Access to Document

10.1016/j.triboint.2019.06.022

Handle.net

Persistent link

Cite this

@article{e91e8516469344f8950dc677a8232fb2,

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

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2020",

month = sep,

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

language = "English",

volume = "149",

journal = "Tribology International",

issn = "0301-679X",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Roller sliding in engine valve train

T2 - Effect of oil film thickness considering lubricant composition

AU - Khurram, Muhammad

AU - Mufti, Riaz Ahmad

AU - Bhutta, Muhammad Usman

AU - Afzal, Naqash

AU - Abdullah, Muhammad Usman

AU - Rahman, Sami ur

AU - Rehman, Saif ur

AU - Zahid, Rehan

AU - Mahmood, Khalid

AU - Ashfaq, Mian

AU - Umar, Muhammad

PY - 2020/9

Y1 - 2020/9

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

UR - http://www.scopus.com/inward/record.url?scp=85067303629&partnerID=8YFLogxK

U2 - 10.1016/j.triboint.2019.06.022

DO - 10.1016/j.triboint.2019.06.022

M3 - Article (Academic Journal)

AN - SCOPUS:85067303629

SN - 0301-679X

VL - 149

JO - Tribology International

JF - Tribology International

M1 - 105829

ER -

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

Abstract

Bibliographical note

Keywords

Access to Document

Handle.net

Other files and links

Fingerprint

Cite this