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
N1 - Publisher Copyright:
© 2019
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 -