Research of Limited and Unlimited Emission Effect on the Environment During the Burning of Alternative Fuels in Agricultural Tractors

Müllerová, D.; Jablonický, Juraj; Hujo, Ľubomír; Kosiba, Ján; Tkáč, Zdenko; Králik, Michal; Chrastina, J.

doi:10.5513/jcea01/14.4.1368

Cited by 4 publications

(2 citation statements)

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“…Corrected absorption coefficient is a value determined by the manufacturer and it is used for determining the maximum permissible value of smoke D MAX . The formula for calculating D MAX is the sum of corrected absorption coefficient and constant which is determined by guidance for the performance of emission control to the value of 0.5 m -1 [6,7].…”

Section: Regeneration Of Filter -Passive Vs Activementioning

confidence: 99%

Possible Solutions for Checking Particulate Matter Filters (DPF) in Motor Vehicles

Lenďák¹,

Jablonický

Uhrinová

et al. 2014

AMR

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Solid carbon (C) is produced during hydrocarbon fuels combustion by the molecules heat decomposition process in a local lack of oxygen. More reactive hydrogen consumed the part of oxygen in the zone of an oxygen-rich mixture, so carbon particles are not gaining access to oxygen. Solid carbon particles are bound to other various materials such as mechanical impurities, sulphates, condensates, and liquid fuel residues, some of them with high toxicity – such as polycyclic aromatic hydrocarbons (PAH). The cause of high solid carbon emissions is a significant inhomogeneity of the mixture up to the value λ = 0 inside the fuel droplets where oxygen absences up to λ = ∞ in the space where fuel does not even come. Therefore, solid carbon emissions highly depend on the quality of atomization of the fuel which is injected into the cylinder. The supply of oxygen required for oxidation is improved by increasing the total amount of the air in the cylinder. In Slovakia as well as in other countries (the Czech Republic, etc.), there have been recently multiple instances of removing catalysts from vehicles by services, deactivation of diesel particulate filters (DPF, SCR), or vehicle control units reprogramming (tuning), or a combination of the previous actions. From the perspective of a company and its interest, it is a large interference with vehicle design, and it also affects the relationship with the environment. From the perspective of society, it is irrelevant whether it is the individual's conduct or the conduct of certain groups. This article explores the possible solutions for checking the illegal diesel engines conversion due to deactivation of particulate matter filters in exhaust systems of diesel engines as well as the current legislation that covers this issue.

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Section: Regeneration Of Filter -Passive Vs Activementioning

confidence: 99%

Possible Solutions for Checking Particulate Matter Filters (DPF) in Motor Vehicles

Lenďák¹,

Jablonický

Uhrinová

et al. 2014

AMR

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“…Within the EU, emission limits are constantly monitored and newer emission standards are being implemented (Euro 6). Stricter emission limits are designed to minimize air pollution and thus there are greater environmental requirements on operation of diesel engines [1]. Due to stricter limits, current research and development of new diesel engines are oriented towards the increase of engine power per unit volume of the cylinder, towards the increase of engine efficiency and towards the reduction of energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Influencing of Combustion Ecology of Diesel Engines by their Intake Resistance

Záležák

Bernát

Kecskés

2014

AMR

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As it is generally known, diesel engines operate with air excess, i.e. lean mixtures. Intake resistances in intake manifolds of diesel engines negatively influence their ecological parameters. Based on these facts, we may conclude that less air in the intake manifold causes increased production of exhaust fumes and fuel consumption. One of the reasons of increased intake resistance is a blocked air filter. In the experiment, we have simulated the increased intake resistance and wished to point out possible consequences of pressure drop at the end of the compression stroke. The choking effect was realized by means of a throttle and scale, which was mounted on the air filter position. By using the dynamic method and obtained results, we found that choking at the rotation angle of 90° and 45° caused the difference of 0.16 MPa of the measured quantity during the maximum revs set on 2000 min-1. The difference in pressure at the end of the compression stroke with the rotation angle of 30° and 90° was by 0.86 MPa higher. Pressure drop in manifold showed the value 0.15 MPa. Manufacturers recommend regular replacement of air cleaners of combustion engines in service intervals; however, we must also keep in mind the environment in which the engine operates. In excessively dusty and otherwise polluted areas, it is necessary to replace cleaners a bit earlier.

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Analysis of the Influence of Fuel on Oil Charge and Engine Wear

Holúbek¹,

Pexa²,

Pavlů³

et al. 2019

Manufacturing Technology

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The combustion engine is a very widespread energy source for many machines and devices. Diesel, gasoline, LPG, CNG, as well as many biofuels such as ethanol, butanol, etc. are used as propellants at the present time. During the running of the internal combustion engine, some fuels penetrate into the crankcase and degrade the engine oil. This potentially reduces the lubricating ability of the oil and changes its degradation process. Submitted paper follows possible changes in lubricating capabilities of oil used in engines with specific fuels: n-butanol, LPG and diesel. Different type of fuel used in combination with an inappropriate operating mode might have a significant influence on the oil and consequently on the engine wear (monitored by a laser particle analyzer). This paper also deals with presence of various types of particles in the engine oil. Results demonstrate proceeding changes noticed in oil and also how was the degradation process effected.

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Research of Limited and Unlimited Emission Effect on the Environment During the Burning of Alternative Fuels in Agricultural Tractors

Cited by 4 publications

References 0 publications

Possible Solutions for Checking Particulate Matter Filters (DPF) in Motor Vehicles

Possible Solutions for Checking Particulate Matter Filters (DPF) in Motor Vehicles

Influencing of Combustion Ecology of Diesel Engines by their Intake Resistance

Analysis of the Influence of Fuel on Oil Charge and Engine Wear

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