Analysis of the Wear Behavior of Combustion Engine Components Using Radionuclide-Technique

Gergye, Tamás; Dreyer, Mathias Roman; Kehrwald, Bernhard; Optatzy, Wolfgang

doi:10.1007/978-3-642-33841-0_13

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…George et al [23] at the Department of Internal Combustion Engines and Propulsion Technology at Széchenyi István University compared the wear on the timing chain of a gasoline engine using new and used oil (15,000 km) and at different operating temperatures in a series of tests. The series of experiments has shown that chain wear increased in proportion to engine speed and load.…”

Section: Wear Measurement On Timing Chains Using the Radionuclide Tec...mentioning

confidence: 99%

Timing chain wear investigation methods: Review

Paulovics¹,

Rohde-Brandenburger²,

Tóth-Nagy³

2022

FME Transactions

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Several methods are used for investigating timing chain wear, from fired engine dynamometer tests through tribological model tests to simulations. Research over the past decade has shown that component or tribometer tests can replace expensive engine dynamometer tests in many cases. Simulation methods can further reduce the cost and time of development. Simulation models require experimentally defined input parameters; therefore, experiment-based methods cannot be completely avoided. However, a comprehensive comparison or validation of the various experimental and simulation techniques is difficult, as the literature on the topic is relatively scarce. This study aims to give a systematic comparison of the results of several investigation methods of timing chain wear, supported by data measured at Széchenyi István University, such as fired engine dynamometer tests, cold dynamometer tests, component tests, and tribometer tests, presenting their benefits and limitations, where possible through examples and results. The study also provides an insight into the compatibility of different measurement methods.

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Section: Wear Measurement On Timing Chains Using the Radionuclide Tec...mentioning

confidence: 99%

Timing chain wear investigation methods: Review

Paulovics¹,

Rohde-Brandenburger²,

Tóth-Nagy³

2022

FME Transactions

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“…In the field of engine development, long-term engine tests and radionuclide technology (RNT) wear measurements are used to test chain wear [4] [5], but due to the high cost and time required of these test methods, a compromise must always be made in the measurement program. This means that the number of variations of engine working point and oil quality is limited.…”

Section: Introductionmentioning

confidence: 99%

Development of comparative investigation method for timing chain wear analysis using oscillating tribometer

Paulovics

Kuti

Rohde-Brandenburger

et al. 2021

Acta Tech. Jaurinensis

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This paper presents the development of a test procedure to investigate timing chain components under abrasive stress on a tribometer. Engine developers use cost and time expensive engine dynamometer tests to investigate timing chain life expectancy under different conditions. Tribometer tests are fast and cost effective, but these use standardized specimen material and geometry that greatly differ from the original tribological system of the timing chain. Manufacturing specimens from the original chain material using the original technology is complicated; surface quality and hardness properties cannot be guaranteed. The aim of research was to develop a test method for rapid and cost-effective comparison of engine lubricants, timing chain materials or coatings, as well as to assess the wear resistance of the chain to contaminants. Various uncontaminated and carbon black blended lubricants were compared using standard-based ball-on-disc tribometer tests to tribometer tests using actual timing chain components (bush-on-pin test) of a Diesel engine. Lubricants were ranked in terms of coefficient of friction and wear. Results showed that bush-on-pin tests were comparably suitable for testing lubricants when evaluated against standard ball-on-disc tribometer tests.

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Investigating the morphology and nanostructure of carbon black dispersed in lubricant oils and their impact on chain wear as a proxy of marginally lubricated components

Pacino,

La Rocca,

Kirkby

et al. 2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Excessive soot concentration in the lubricant promotes excessive wear on timing chains. The relationship between chain wear and soot concentration, morphology, and nanostructure, however, remains inconclusive. In this work, a chain wear test rig is used to motor a 1.3 L diesel engine following the speed profile of a Worldwide Harmonized Light Vehicle Test Cycle (WLTC). The lubricant oil was loaded with 3% carbon black of known morphology. The chain length is measured at regular intervals of 20 WLTC cycles (i.e. 10 hours) and the wear is expressed as a percentage of total elongation. Oil samples were collected and analysed with the same frequency as the chain measurements. Carbon black morphology and nanostructure were investigated using Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM). DLS data revealed carbon black particle size did not change substantially in the first 10 hours, however, during the remaining test cycles a reduction in agglomerates size over time was observed. The wear results show that adding carbon black to the lubricating oil promotes chain elongation by up to 0.10%. Significant chain elongation occurred within the first 10 hours (+0.06%), with further increase in elongation occurring in the remaining 40 hours (+0.04%) but under a reduced wear rate. The overall results suggest that dynamically changing carbon black size distributions and nanostructure could be linked changes over time.</div></div>

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Analysis of the Wear Behavior of Combustion Engine Components Using Radionuclide-Technique

Cited by 3 publications

References 1 publication

Timing chain wear investigation methods: Review

Timing chain wear investigation methods: Review

Development of comparative investigation method for timing chain wear analysis using oscillating tribometer

Investigating the morphology and nanostructure of carbon black dispersed in lubricant oils and their impact on chain wear as a proxy of marginally lubricated components

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