Discriminating Tests for Automotive Engine Air Filters

Ptak, T. J.; Richberg, Puenpit; Vasseur, Thierry

doi:10.4271/2001-01-0370

Cited by 3 publications

(4 citation statements)

References 18 publications

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“…SiO 2 67-69 According to the author of the paper [107], the engine wear, depending on the concentration of dust in the air increases exponentially. At the dust concentration s = 20-30 mg/m 3 the wear becomes 1000 times higher than at the concentration s = 1-2 mg/m 3 , which is 10 times lower.…”

Section: Components Of Dust Percent By Weight [%]mentioning

confidence: 99%

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A Study on the Effect of Inlet Air Pollution on the Engine Component Wear and Operation

Dziubak

2022

Energies

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This paper systematically reviews the research progress in the field of the influence of air pollutants in the engine inlet on the accelerated wear of the elements of the association: piston, piston rings, cylinder liner (P-PR-CL), and plain bearing (journal–panel). It was shown at the outset that the primary component of air pollution is road dust. Its main components are dust grains of hard minerals (SiO2, Al2O3), which penetrate the oil film area between two frictionally mating surfaces causing their abrasive wear. Therefore, the effect of three dust parameters (grain size and hardness, and dust concentration in air) on the accelerated wear of the friction pair: piston, piston rings, cylinder liner(P-PR-CL), and plain bearing (journal–pan) is presented extensively. It was noted that the wear values of the same component were obtained by different researchers using different testing techniques and evaluated by different indices. It has been shown that the greatest wear of two frictionally cooperating surfaces is caused by dust grains with sizes equal to the thickness of the oil film at a given moment, which in typical combustion engine associations assumes varied and variable values in the range of 0–50 µm. The oil film thickness between the upper ring and the cylinder liner varies and depends on the crankshaft rotation angle, engine speed and load, and oil viscosity, and takes values less than 10 µm. It was shown that the maximum wear of the cylinder liner, resulting from the cooperation with the piston rings, occurs in the top dead centre (TDC) area and results from unfavorable (high temperature, low piston speed) operating conditions of these elements. From the extensive literature data cited, it follows that abrasive wear is caused by dust grains of specific dimensions, most often 5–20 µm, the greater the wear the greater the hardness of the grains and the sulfur content of the fuel. At the same time, it was shown that the main bearing, crankshaft bearing, and oil ring experienced maximum wear by a different range of particle size, respectively: 20–40, 5–10, and 20–80 μm. It was shown that the mass of dust that enters the engine cylinders and thus the wear of the components is determined by the concentration of dust, the value of which is definitely reduced by the air filter. However, it was pointed out that the low initial filtration efficiency and the presence of large dust grains in the purified air in the initial period of the filter operation (after replacement of the filter element with a new one) may have an impact on the accelerated wear of mainly (P-PR-CL) association. The next stage of the paper presents the effects of excessive wear of the cylinder liner and piston rings of the engine, resulting from actual vehicle operation and bench tests on the decrease in compression pressure and engine power, increase in the intensity of exhaust gas blow-by into the oil sump and increase in oil consumption and exhaust gas toxicity. This paper addresses the current problem of the effect of engine inlet air contaminants on the performance of the air flow meter, which is an essential sensor of the modern internal combustion engine. The phenomenon of deposition of contaminants (mineral dust, salt, carbon deposit, and moisture) on the measuring element (wire or layer anemometer) of the air flow meter has been analyzed. The empirical results presented show that the mineral dust layer on the measuring element of the air flow meter causes a 17.9% reduction in output voltage, and the dust and oil layer causes a 46.7% reduction in output voltage. This affects the decrease in engine power and exhaust toxicity.

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Section: Components Of Dust Percent By Weight [%]mentioning

confidence: 99%

“…For an air filter with a certain filtration efficiency, a higher dust concentration in the air results in a greater mass of dust entering the engine cylinders. Several studies have shown that engine wear increases significantly as the concentration of dust taken in with the air by the engine increases [94,96,103,[106][107][108].…”

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confidence: 99%

A Study on the Effect of Inlet Air Pollution on the Engine Component Wear and Operation

Dziubak

2022

Energies

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“…Of all the forces, it was reported that the viscous dissipative force and the capillary force are the most dominating for hindering the bounce of particles upon impact. The viscous dissipative force, F vis, p , which is acting during penetration and emergence, is mathematically given by equations ( 7) and (8). Equation ( 7) is applicable for the viscous force F vis, p, ∞ when the distance between the particle and the filter surface, d, is very high.…”

Section: Gravimetric Filtration Efficiencymentioning

confidence: 99%

“…This leads to poor engine life, remarkable performance loss, high oil consumption, increased operation cost, enhanced air pollution, and greater CO 2 emission. [5][6][7][8] The modern automotive engine intake air filters are expected to comply with filtration performance as laid down in the following relevant specifications under all operating conditions. The filtration efficiency should be greater than or equal to a minimum specified efficiency.…”

Section: Introductionmentioning

confidence: 99%

Liquid-mediated particle capture by nonwoven filter media for automotive engine intake air filtration

Yadav

Das

2021

Journal of Industrial Textiles

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This article reports on development, characterization, and performance of liquid-treated nonwoven air filter media for automotive engine intake application. A polypropylene fiber-based needle-punched nonwoven fabric was prepared for treatment with four viscous liquids (glycerol, SAE 20W/50 engine oil, PEG 400, and deionized water) by liquid spraying technique. The filtration performance was evaluated in terms of initial and final gravimetric filtration efficiencies, fractional filtration efficiency, evolution of pressure drop, and dust holding capacity. The liquid-treated filter media registered higher gravimetric as well as fractional filtration efficiency and higher dust holding capacity as compared to the untreated ones. The initial and final gravimetric filtration efficiencies were found to be directly related to liquid add-on via a power law relationship. The liquid-treated filter media also exhibited higher fractional filtration efficiency than their untreated counterparts for all sizes of tested particles. Interestingly, the increase of fractional efficiency was more for smaller particles as compared to larger ones. This was explained quantitatively through single fiber efficiency due to adhesion. The viscosity of liquid was found to be a very crucial parameter as the dust deposition morphology was contingent to the flow of liquid onto the filter media. The stickiest liquid yielded highest filtration efficiencies, displayed slowest rise of pressure drop, and exhibited highest dust holding capacity.

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Optimization Methodology for Flow & amp; Acoustics Performance of Air Induction System

Dixit¹,

Mudgal²,

Gandhe³

2018

SAE Technical Paper Series

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Discriminating Tests for Automotive Engine Air Filters

Cited by 3 publications

References 18 publications

A Study on the Effect of Inlet Air Pollution on the Engine Component Wear and Operation

A Study on the Effect of Inlet Air Pollution on the Engine Component Wear and Operation

Liquid-mediated particle capture by nonwoven filter media for automotive engine intake air filtration

Optimization Methodology for Flow & amp; Acoustics Performance of Air Induction System

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