Visualisation of fuel‐lubricant interaction on the cylinder surface in the combustion chamber of SI engines

Kovács, Anita

doi:10.1002/ls.3010070204

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…Peralta (MIT) [14] found fuel dilution levels of 1-4% (by mass) in a fully warmed up Saturn four-cylinder gasoline engine. Similarly, Kovacs et al [15] found typical fuel dilution rates of 1.2% in a fully warmed up single cylinder 398 cm 3 displacement Kohler engine. Frottier et al (PSA/Peugeot/Citroen) [16] also found fuel dilution levels of 1.35% (by mass) in a Saturn engine after an 18-h long test.…”

Section: Fuel Dilution Levels In Vehiclesmentioning

confidence: 76%

Fuel-Lubricant Interactions: Critical Review of Recent Work

Taylor

2021

Lubricants

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A critical review of recent work on fuel lubricant interactions is undertaken. The work focusses on liquid fuels used in diesel and gasoline vehicles. The amount of fuel that contaminates the lubricant depends on driving conditions, engine design, fuel type, and lubricant type. When fuel contaminates a lubricant, the viscosity of the lubricant will change (it will usually decrease), the sump oil level may increase, there may be a tendency for more sludge formation, there may be an impact on friction and wear, and low speed pre-ignition could occur. The increased use of biofuels (particularly biodiesel) may require a reduction in oil drain intervals, and fuel borne additives could contaminate the lubricant. The move towards the active regeneration of particulate filters by delayed fuel post-injection and the move towards hybrid electric vehicles and vehicles equipped with stop-start systems will lead to increased fuel dilution. This will be of more concern in diesel engines, since significant fuel dilution could persist at sump oil temperatures in the range of 100–150 °C (whereas in gasoline engines the more volatile gasoline fuel will have substantially evaporated at these temperatures). It is anticipated that more research into fuel lubricant interactions, particularly for diesel engines, will be needed in the near future.

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Section: Fuel Dilution Levels In Vehiclesmentioning

confidence: 76%

Fuel-Lubricant Interactions: Critical Review of Recent Work

Taylor

2021

Lubricants

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show abstract

“…Peralta (MIT) [14] found fuel dilution levels of 1 to 4% (by mass) in a fully warmed up Saturn four-cylinder gasoline engine. Similarly, Kovacs et al [15] found typical fuel dilution rates of 1.2% in a fully warmed up single cylinder 398 cm 3 displacement Kohler engine. Frottier et al (PSA/Peugeot/Citroen) [16] also found fuel dilution levels of 1.35% (by mass) in a Saturn engine after an 18-hour long test.…”

Section: Fuel Dilution Levels In Vehiclesmentioning

confidence: 76%

Fuel-Lubricant Interactions: Critical Review of Recent Work

Taylor¹

2021

Preprint

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A critical review of recent work on fuel lubricant interactions is undertaken. The work focusses on liquid fuels used in diesel and gasoline vehicles. The amount of fuel that contaminates the lubricant depends on driving conditions, engine design, fuel type and lubricant type. When fuel contaminates a lubricant, the viscosity of the lubricant will change (it will usually decrease), the sump oil level may increase, there may be a tendency for more sludge formation, there may be an impact on friction and wear, and low speed pre-ignition could occur. The increased use of biofuels (particularly biodiesel) may require a reduction in oil drain intervals, and fuel borne additives could contaminate the lubricant. The move to active regeneration of particulate filters by delayed fuel post-injection and the move to hybrid electric vehicles, and vehicles equipped with stop-start systems will lead to increased fuel dilution. This will be of more concern in diesel engines, since significant fuel dilution could still persist at sump oil temperatures in the range 100-150C (whereas in gasoline engines the more volatile gasoline fuel will have substantially evaporated at these temperatures). It is anticipated that more research into fuel lubricant interactions, particularly for diesel engines, will be needed in the near future.

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“…Laser-induced fluorescence, a technique based on the photoexcitation of a fluorophore or a fluorescent dye, has been extensively used as a general-purpose display tool in one-, two-, and three-dimensional applications. 1,2 However, it is used mainly as a tracer for qualitative purposes [3][4][5] and has seen only limited use as a quantitative tool. This limitation stems primarily from the fact that fluorescent intensity is dependent on the intensity of the exciting light.…”

Section: Introductionmentioning

confidence: 99%

Excitation nonlinearities in emission reabsorption laser-induced fluorescence techniques

2004

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The effects of the nonlinear behavior of fluorescent intensity with excitation intensity on emission reabsorption laser-induced fluorescence (ERLIF) are investigated. Excitation nonlinearities arise mainly as a consequence of the depletion of the ground-state population stemming from the finite lifetime of molecules in the excited state. These nonlinearities hinder proper suppression of the excitation intensity information in the fluorescence ratio, degrading measurement accuracy. A method for minimizing this effect is presented. This method is based on the approximation of the fluorescence intensity nonlinearities by a power law. Elevating the two-dimensional fluorescent intensity maps to the appropriate exponent allows for proper suppression of excitation intensity in the fluorescence ratio. An overview of the principles and constitutive equations behind ERLIF film-thickness measurements, along with a characterization of the fluorescence's nonlinear behavior, is presented. The power law approximation and processing scheme used to mitigate this behavior are introduced. Experimental proof of the validity of the approximation and processing scheme is provided.

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Visualisation of fuel‐lubricant interaction on the cylinder surface in the combustion chamber of SI engines

Cited by 5 publications

References 10 publications

Fuel-Lubricant Interactions: Critical Review of Recent Work

Fuel-Lubricant Interactions: Critical Review of Recent Work

Fuel-Lubricant Interactions: Critical Review of Recent Work

Excitation nonlinearities in emission reabsorption laser-induced fluorescence techniques

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