Technique developed to study camshaft and tappet wear on real production engine

Journal article

Waseem Arshad, Muhammad Adnan Hanif, Muhammad Usman Bhutta, Riaz Ahmad Mufti, Samiur Rahman Shah, Muhammad Usman Abdullah and Muhammad Huzaifa Najeeb 2017. Technique developed to study camshaft and tappet wear on real production engine. Industrial Lubrication and Tribology. 69 (2), pp. 174-181. https://doi.org/10.1108/ILT-06-2016-0135
AuthorsWaseem Arshad, Muhammad Adnan Hanif, Muhammad Usman Bhutta, Riaz Ahmad Mufti, Samiur Rahman Shah, Muhammad Usman Abdullah and Muhammad Huzaifa Najeeb
Abstract

Purpose
This paper aims to present a technique that has been developed to study the wear in the camshaft and tappet. The engine manufacturers use the most suitable materials, lubrication additives and surface coatings to minimize friction in all the components of the engine. Reduced friction results in less wear of critical engine components. The researchers are constantly trying to find an improved lubrication formula which reduces the wear and friction coefficient at a considerably low price. In this regard, the cam follower interface is of much importance because most of the wear occurs in this interface.

Design/methodology/approach
The tappets and the cam lobes are analyzed to determine wear. A two-dimensional optical surface profilometer is used to measure the tappet wear, and a high-resolution linear variable differential transformer is used for the measurement of cam lobes. Tests are conducted on Mercedes Benz engine OM 646 under constant camshaft speed, constant inlet lubricant temperature and constant lubricant pressure to study the oil rheology on cam tappet wear.

Findings
The results show that the wear occurs on the cam tappet interface, which is almost a linear phenomenon, and it increases with use.

KeywordsCamshaft; Production engine; Tappet wear
Year2017
JournalIndustrial Lubrication and Tribology
Journal citation69 (2), pp. 174-181
PublisherEmerald
ISSN0036-8792
Digital Object Identifier (DOI)https://doi.org/10.1108/ILT-06-2016-0135
Official URLhttps://www.emerald.com/insight/content/doi/10.1108/ILT-06-2016-0135/full/html
Publication dates
Online13 Mar 2017
Publication process dates
Deposited27 Jul 2023
Output statusPublished
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https://repository.canterbury.ac.uk/item/951vw/technique-developed-to-study-camshaft-and-tappet-wear-on-real-production-engine

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