Experimental investigation of engine valve train friction considering effects of operating conditions and WPC surface treatment

Journal article


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
AuthorsMuhammad 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
Abstract

Reduction in friction ensures fuel economy, control on emissions and durability of components in internal combustion engines. A modern gasoline internal combustion engine was instrumented to determine the friction values at the cam–roller interface considering the effects of surface treatment and engine operating state. A series of tests under different operating speeds and lubricant inlet temperatures were undertaken using both an original surface roller and a Wonder Process Craft (WPC) surface-treated engine roller. The results clearly revealed a substantial reduction in friction magnitude for the WPC surface-treated engine roller in comparison to the original roller while operating under similar conditions, indicating their strong potential for employment in engines. An increase in friction with the rise in temperature was also observed for both types of rollers, whereas increased lubricant entraining velocity due to higher operating speed had the opposite impact. A considerable reduction in frictional drive torque ranging from 8% to 28% was observed by employing the WPC-treated roller in comparison to original/untreated roller at various operating conditions, which signifies the strong potential for employment of WPC surface treatment in the roller/follower valve train engines.

KeywordsEngine valve train ; Cam–roller interface; Friction; WPC; Camshaft speed; Operating temperature
Year2023
JournalMaterials
PublisherMDPI
ISSN1996-1944
Digital Object Identifier (DOI)https://doi.org/10.3390/ma16093431
Official URLhttps://www.mdpi.com/1996-1944/16/9/3431
Publication dates
Online28 Apr 2023
Publication process dates
Accepted15 Dec 2022
Deposited26 Jul 2023
Publisher's version
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Output statusPublished
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https://repository.canterbury.ac.uk/item/951v2/experimental-investigation-of-engine-valve-train-friction-considering-effects-of-operating-conditions-and-wpc-surface-treatment

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