Impact factors for the degradation of engine oil causing carbonaceous deposits in the piston’s grooves of Diesel engines

Diaby, Moussa; Singhal, Piyush; Ousmane, M.; Sablier, Michel; Negrate, A. Le; Fassi, M. El; Zymla, Victor

doi:10.1016/j.fuel.2012.12.021

Cited by 12 publications

(7 citation statements)

References 30 publications

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“…Whereas no change has been noticed at layer thickness, a trend to higher amounts of aromatic compounds at higher pressures was observed in the deposits. Although a lot of studies refer to engine malfunctions as a result of the introduction of high-pressure common rail diesel injectors, there are only a few concentrated on pressure influence on deposit formation. ,,,, In these studies, other substance classes, such as alkanes and cycloalkanes, which are not accessible with REMPI–MS, were found in the deposits beside aromatics. The result at higher fuel injection amount is less surprising because aromatic compound quantity correlates with it.…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Analysis of Internal Common Rail Injector Deposits via Thermodesorption Photon Ionization Time of Flight Mass Spectrometry

et al. 2015

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Increasing reports about malfunctions in Common Rail Injector (CRI) systems lead to a more intensive research on diesel fuel injection systems, which are working under higher pressures and temperatures. Under these conditions, deposits were formed and they deteriorated the injector performance. Therefore, it is necessary to investigate the formed deposits in order to avoid injector sticking. Previous studies have identified different substance classes such as alkanes, carboxylic salts and aromatic hydrocarbons in the deposits. In particular, aromatics and polycyclic aromatic hydrocarbons (PAH) are suspected to produce insoluble solid precipitates. In this study, thermodesorption resonance-enhanced multiphoton ionization time-of-flight mass spectrometry (REMPI-ToF-MS) as a novel analytical technique for direct measurements of aromatic containing deposits on injector parts was performed. Experiments were carried out in a self-made test bench, where the CRI were installed. Influence of temperature, injection pressure, injection amount of used fuel and fuel composition on the tendency to form deposits on the metal surface of commercial CRI parts, especially its ring, was investigated. In most cases, the rings were directly analyzed by the aromatic selective REMPI-technique without any sample preparation. The temperature program of the used Carbon Analyzer (CA) helps to separate the desorbing material into volatile and non-volatile organic matter during the pyrolysis under helium atmosphere within the oven of the CA. The results concentrate on volatile organic matter desorbing step and indicate a strong influence of temperature and fuel composition on the amount of analyzed aromatic compounds. They were not equal with the results of thickness layer measurements in individual cases. Comprehensive analytical methods such as single photon ionization (SPI) are needed for further information.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Analysis of Internal Common Rail Injector Deposits via Thermodesorption Photon Ionization Time of Flight Mass Spectrometry

et al. 2015

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“…In region III, the rate of matter loss showed by the derivative thermogravimetric (DTG) curve in Figure 2 is much higher than that in Figure 1, which indicates some components can be oxidized to gas in this region. The similar matter loss under two different atmospheres in the first two regions can be interpreted as the evaporation of light compounds, including water and organics [22]. They comprised about 35% of the content in the carbonaceous deposit.…”

Section: Compositionmentioning

confidence: 91%

“…The similar matter loss under two different atmospheres in the first two regions can be interpreted as the evaporation of light compounds, including water and organics [22]. They comprised about 35% of the content in the carbonaceous deposit.…”

Section: Organic and Inorganic Components In The Depositmentioning

confidence: 91%

“…It can be observed that the formation time of the deposits in the end-of-life engines is much longer than the deposits in the above studies. As the composition and structure of the carbonaceous deposits will vary with their growth processes [21][22][23], it is necessary to study the carbonaceous deposits, particularly in end-of-life engines.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Carbonaceous Deposits on an End-of-Life Engines for Effective Cleaning for Remanufacturing

Wang

Jia

et al. 2021

Sustainability

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Remanufacturing is one of the most effective strategies to achieve sustainable manufacturing and restore the performance of end-of-life products. However, the lack of an effective cleaning method to clean carbonaceous deposits severely hampers the remanufacturing of end-of-life engines. To explore an appropriate cleaning method, it is necessary to first study the characterization of the carbonaceous deposits. A broad range of analyses including X-ray fluorescence spectrometry, thermogravimetric analysis, 1H-nuclear magnetic resonance study, X-ray diffraction analysis, and scanning electron microscopy were performed to conduct an in-depth characterization of the carbonaceous deposits. The results showed that a hybrid structure composed of organics and inorganics is the most distinguishing feature of the carbonaceous deposit in end-of-life engines. The inorganics form the skeleton on which organics get attached, thereby resulting in a strong adhesion of the deposit and increasing the difficulty of cleaning. Therefore, a method in which several cleaning forces can be simultaneously applied is more suitable for the present purpose. Molten salt cleaning was chosen to verify the feasibility of this proposal. This method was shown to have the potential to effectively clean the carbonaceous deposit. This finding could contribute towards promoting the effective remanufacturing of end-of-life engines.

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Thermal oxidation of aviation lubricating oil: Mechanism, influencing factors, evaluation methods, and antioxidants

Zhang,

Huang,

et al. 2024

Asia-Pacific J Chem Eng

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Aviation lubricating oil, as the “blood of machine operation”, plays an important role in the lubrication, cooling, cleaning, sealing, rust prevention, and other aspects of aero‐engines, thereby ensuring the safe and stable long‐term endurance of aero‐engines under high‐speed and high‐temperature conditions. The thermal oxidation of aviation lubricating oil leading to decay is the most important factor causing lubricating oil failure, which will seriously affect the performance of aero‐engines and endanger flight safety. Here, we comprehensively summarize the oxidation mechanism of aviation lubricating oil, factors affecting thermal oxidation of aviation lubricating oil, evaluation methods for thermal oxidation of aviation lubricating oil, and antioxidants that inhibit thermal oxidation of aviation lubricating oil. We hope that this review can enhance readers' understanding of the thermal oxidation of aviation lubricating oil, stimulate broader interest, and promote more exciting development in this promising field.

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Impact factors for the degradation of engine oil causing carbonaceous deposits in the piston’s grooves of Diesel engines

Cited by 12 publications

References 30 publications

Analysis of Internal Common Rail Injector Deposits via Thermodesorption Photon Ionization Time of Flight Mass Spectrometry

Analysis of Internal Common Rail Injector Deposits via Thermodesorption Photon Ionization Time of Flight Mass Spectrometry

Characterization of Carbonaceous Deposits on an End-of-Life Engines for Effective Cleaning for Remanufacturing

Thermal oxidation of aviation lubricating oil: Mechanism, influencing factors, evaluation methods, and antioxidants

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