Investigation on low-speed pre-ignition from the quantification and identification of engine oil droplets release under ambient pressure conditions

Tormos, Bernardo; García-Oliver, José M; Bastidas, Sophia; Domı́nguez, Beatriz; Oliva, Fermín; Cárdenas, Dolores

doi:10.1016/j.measurement.2020.107961

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…Furthermore, the sulfur-and-phosphorus-based compound that is contained in lube oil poisons precious metals in aftertreatment catalysts, which lowers their service life. The remaining oil droplets in the combustion chamber could cause combustion anomalies, such as preignition, which result in the knocking of an engine [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics

Vareka

Rossegger²,

Novotny-Farkas³

et al. 2022

Lubricants

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Because of the impact of lubrication on the efficiency and the lifecycle cost and emissions, the lubricating-oil consumption (LOC) is one of the key indicators in the research and development of internal combustion engines. State-of-the-art methods for LOC measurement are based on the use of a certain tracer to track the oil consumption. However, all of the currently available tracers have their downsides (e.g., the use of a radioactive tracer, corrosive emissions, etc.). Therefore, in the course of this research project, a new tracer substance that is based on a stable nonradioactive isotope of hydrogen—deuterium—was developed and tested thoroughly. The LOC is monitored by a hydrogen/deuterium isotopic ration in the exhaust gas by using an isotopic water analyzer. Tribologically important properties, such as the viscosity, stability, and compatibility of the tracer were investigated by laboratory experiments by using several tools, such as infrared spectroscopy, gas chromatography, thermogravimetry, etc. The properties relevant to the applicability of the method, such as the accuracy and the reproducibility, were investigated by engine test-bench experiments. Finally, long-term stability tests of the tracer were conducted with a field test.

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Section: Introductionmentioning

confidence: 99%

Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics

Vareka

Rossegger²,

Novotny-Farkas³

et al. 2022

Lubricants

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show abstract

“…Помимо этого, слишком тонкая масляная пленка позволяет более мелким частицам загрязнений, которые, возможно, прошли через фильтр, непосредственно соприкасаться с движущимися металлическими поверхностями, также вызывая абразивный износ. Образование эмульсий в смазочном материале может привести к образованию шлама и отложений, которые могут вызвать повышенный износ насосов и засорить отверстия, сопла, форсунки и фильтрующие элементы очистки масел [13,14,15,16,17].…”

Section: Introductionunclassified

The i̇nfluence of water on the change i̇n engi̇ne oi̇l quali̇ty i̇ndi̇cators

Корнеев

2021

Vestn. SibADI

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Introduction. One of the main types of deposits in an internal combustion engine is an emulsion or sludge formed by water, decomposition of fuel residues and solid residues. The sludge usually settles on the colder surfaces of the engine, such as the bottom of the crankcase pan, valve chambers and upper boards. The main problem is that this type of deposits can be collected by the engine oil and transferred to areas such as the oil pump, intake valve or oil channels, where the sludge can interfere with the flow of oil and cause a failure of the lubrication mode. In addition to the disruption in the operation of the above-mentioned systems, the engine oil quality indicators are also undergoing changes for the worse.Materials and methods. To monitor the condition of the engine oil, it is necessary to determine the characteristics of its performance, such as: kinematic viscosity at 40 oC and at 100 oC, acid number, base number and determine the number of elements – indicators of additives and wear products contained in the engine oil. The viscosity was determined using a Stabinger SVM 3000 viscometer. It measures the dynamic viscosity and density of oils and fuels in accordance with ASTM D7042 and automatically calculates the kinematic viscosity, viscosity index and outputs the measurement results. The acid and base numbers were determined using an automatic titrator TitroLine alpha plus, and the presence of indicator elements in engine oil using an inductively coupled plasma optical emission spectrometer of the iCAP 7000 series, designed for analysis and determination of the number of indicator elements in liquid and solid samples.Results. The dynamics of changes in the performance characteristics of the Gazpromneft Diesel Ultra 10W-40 engine oil with an extended replacement interval, which is applicable for equipment operating in severe conditions, depending on the water content in the samples of this lubricant, was analyzed.Conclusion. The consequences that may occur due to water entering the engine oil are indicated.

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Numerical matching of supercharger for gasoline engine based on three-line working condition method

Shang

Zhang

et al. 2023

Case Studies in Thermal Engineering

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Investigation on low-speed pre-ignition from the quantification and identification of engine oil droplets release under ambient pressure conditions

Cited by 9 publications

References 27 publications

Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics

Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics

The i̇nfluence of water on the change i̇n engi̇ne oi̇l quali̇ty i̇ndi̇cators

Numerical matching of supercharger for gasoline engine based on three-line working condition method

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