An Evaluation and Optimization of Lubricants for Turbocharged Gasoline Engines

Kagaya, Mineo; Ishikawa, Sakae

doi:10.4271/840261

Cited by 9 publications

(6 citation statements)

References 3 publications

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“…Although the formation of deposits is inevitable in gas engines operating under high temperature conditions, it needs to be minimised as much as possible. Engine oil is known to have a considerable influence on deposit formation [8], especially under high power density conditions [9]. As already reported in other contexts [10][11][12], the base oil of a lubricant plays an important role in additive expression and effectiveness, and should not be disregarded when attempting to optimise a lubricated system.…”

Section: Introductionmentioning

confidence: 89%

“…In the case of a significant reduction (to 7%), however, a negative influence on the engine oil performance was detected. Formulating an optimal lubricant for a specific application is a challenging task, in which many aspects must be addressed, as was illustrated by Kagaya et al [8] for the case of an engine oil for turbocharged engines. Clearly, there are many factors to consider regarding gas engine oil formulation, many of which were not treated in this work.…”

Section: Formulation Considerationsmentioning

confidence: 99%

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Assessing the High-Temperature Deposit Formation of Paraffinic and Naphthenic Oil Blends Using the Oil Chute Method

et al. 2022

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Due to the demand for higher efficiency, gas engine designs are changing in that gas engine oils are exposed to higher thermal stress and face challenges regarding the prevention of deposits. In this work, the “oil chute” laboratory test was used to study the high-temperature deposit-formation tendency of various paraffinic and naphthenic base oil blends. The oil chute is a setup that circulates oil through two different temperature zones, the hot zone being a heated metal chute that triggers deposit formation. In addition, the thermo-oxidative stability of the oil blends was investigated using an artificial alteration method. The results showed that naphthenic base oils have the capability of substantially reducing high-temperature deposit formation. However, they tend to degrade faster under thermo-oxidative stress. Therefore, finding the right balance between paraffinic and naphthenic base oil components will allow the formulation of gas engine oils that provide the right properties to cope with the higher stress levels they are subjected to in modern gas engines.

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Section: Introductionmentioning

confidence: 89%

Section: Formulation Considerationsmentioning

confidence: 99%

Assessing the High-Temperature Deposit Formation of Paraffinic and Naphthenic Oil Blends Using the Oil Chute Method

et al. 2022

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“…leading to lubrication failure. Among the methods proposed to reduce deposits, use of optimal additives [19][20][21][22][23][24] and reduction of temperature are considered to be effective [25]. Though rarely reported, desorption of deposits from metal surfaces also needs to be addressed, as it could cause secondary damage.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Carbonaceous Deposit Formation Caused by Lubricating Oil on High Temperature Metal Surfaces

Yokoyama

Iwama

2014

Tribology Online

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While formation of deposits in machinery used under high temperature conditions is inevitable, it needs to be minimized as much as possible. Desorption of deposits, though rarely reported, also needs to be addressed, as it could cause secondary damage. There have been a number of reports on the formation of high-temperature deposits and the effects of additives, none of which, however, addresses the desorption phenomenon as part of the deposit formation mechanism. Paying attention to the polar properties of lubricating oils and evaluating the formation, dissolution, and desorption of deposits by lubricating oils, the formation mechanism of high-temperature deposits was considered. Taking notice also of the changes in polar characteristics of oils with the progress of oxidative degradation of oil, we examined the influence of oxidative degradation of oils on the tendency to form high-temperature deposits. Furthermore, the countermeasure to prevent from deposit formation is also considered.

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“…And sticky deposits caused by engine oil and fuel oil are formed in a piston land and the ring back in marine diesel engine [6]. The organic compound contained in lubricating oil or fuel oil is main constituent, and these deposits can be reduced by application of optimal formulated oils [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Hard Solid Deposit Formation on Turbine Housing, Nozzle and Blades in Marine Use Turbocharger at the Elevated Temperature

et al. 2014

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Hard solid deposit formation has been inevitable problem in marine use turbocharger, and many engineers have struggled with it for years. It is due to low quality fuel, and the deposit results in the deterioration of the performance. In addition, the deposit is hard so that it is difficult to be removed at periodical maintenance. However, hard solid deposit formation has not been reported and understood. In this study, the deposit in actual service turbocharger was analyzed, and the dependency of operation condition on the deposit formation was investigated. And the deposit formation was demonstrated using newly designed test method, vapor phase coking deposit evaluation test. Furthermore, the countermeasure to prevent from deposit formation is considered, and it was found the deposit formation is largely influenced by ingredient of metal.

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An Evaluation and Optimization of Lubricants for Turbocharged Gasoline Engines

Cited by 9 publications

References 3 publications

Assessing the High-Temperature Deposit Formation of Paraffinic and Naphthenic Oil Blends Using the Oil Chute Method

Assessing the High-Temperature Deposit Formation of Paraffinic and Naphthenic Oil Blends Using the Oil Chute Method

Mechanism of Carbonaceous Deposit Formation Caused by Lubricating Oil on High Temperature Metal Surfaces

Hard Solid Deposit Formation on Turbine Housing, Nozzle and Blades in Marine Use Turbocharger at the Elevated Temperature

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