scholarly journals Experimental research on filtering fibers in a cyclone–porous barrier system

2014 ◽  
Vol 158 (3) ◽  
pp. 45-55
Author(s):  
Tadeusz DZIUBAK ◽  
Sebastian SZWEDKOWICZ
Keyword(s):  
Granulometric Composition ◽  
Motor Vehicles ◽  
Air Filter ◽  
Filtering Method ◽  
Air Cleaners ◽  
Porous Barriers ◽  
Materials Used ◽  
Filtering Element ◽  
Filtering Rates ◽  
Dust Absorption

Properties of filtering materials used as porous barriers in air cleaners of motor vehicles have been analyzed in the paper. Relations that determine the filter life have been analyzed and the coefficient of dust absorption km of the filtering material has been determined. Methodology of research has been presented of a study air filter element made of filtering fiber used as a second filtering stage downstream of a single continuous cyclone. The results of the investigations into the characteristics of efficiency, accuracy and drag of the filtering fiber for different filtering rates have been discussed. Dust absorption coefficients km have been determined. Changes in the granulometric composition of dust downstream of the investigated filtering element have been presented. Benefits resulting from the application of a two-stage air filtering method have been indicated.

scholarly journals Experimental research of intake air filtering fibers in motor vehicle engines

2013 ◽  
Vol 155 (4) ◽  
pp. 33-43
Author(s):  
Tadeusz DZIUBAK ◽  
Sebastian SZWEDKOWICZ
Keyword(s):  
Experimental Research ◽  
Motor Vehicle ◽  
Filter Element ◽  
Filter Life ◽  
Air Cleaners ◽  
Porous Barriers ◽  
Selection For ◽  
Materials Used ◽  
Filtering Rates ◽  
Dust Absorption

Properties of filtering materials used as porous barriers in filter elements of motor vehicle air cleaners have been analyzed. Criteria of fiber and paper selection for the filter elements have been presented. A relation showing the filter life and a coefficient of dust absorption km of filtering materials have been presented. A methodology of research of the fiber filter element characteristics has been developed. Results of investigations of the characteristics of efficiency, filtering accuracy and drag of the filtering fiber operating at different filtering rates have been presented. The coefficients of dust absorption km of the filtering fiber have been determined. Changes in the granulometric properties of dust in the airflow downstream of the filtering fiber and paper have been presented.

scholarly journals Operating properties of air inlet filters in a sports car engine

2017 ◽  
Vol 66 (2) ◽  
pp. 123-144
Author(s):  
Tadeusz Dziubak ◽  
Yuriy Yendzheyovskyy
Keyword(s):  
Absorption Coefficient ◽  
Flow Resistance ◽  
Motor Vehicles ◽  
Test Results ◽  
Particle Fraction ◽  
Air Filters ◽  
Air Filter ◽  
Air Inlet ◽  
The Impact ◽  
Dust Absorption

There are presented design solutions and operation properties of air inlet filters of motor vehicles and sports cars. An analysis of the impact of the use of a sports car air filter in a passenger car was performed. The effect of this change on the increase in power and torque in several car engines was shown. The conditions and methodology of sports car air filter studies have been developed. A research stand with a particle counter was presented. The test results on the characteristics of efficiency and accuracy filtration and flow resistance of two sports air filters were presented. Each filter was tested at a different filtration rate. The dust absorption coefficient of the sport filter was determined. The dust particle fraction in the air purified behind the filter was calculated. Keywords: engine, air filter, sports filter, filtration efficiency and filtration accuracy, flow resistance, dust absorption coefficient, particle size

scholarly journals Assessment of logistical support for road maintenance to manage road accidents in Vhembe district municipalities

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
Peter Bikam
Keyword(s):  
Service Providers ◽  
Road Accident ◽  
Motor Vehicles ◽  
Road Maintenance ◽  
Road Accidents ◽  
Deficit Model ◽  
Technology Innovations ◽  
Operations And Maintenance ◽  
Materials Used ◽  
Vhembe District

This article discusses the problems of logistical support for road maintenance to manage road accidents in Vhembe district municipalities. A budget deficit model was used to explain the level of inadequate logistics support to manage operations and maintenance of municipal roads as a preventative measure against road accident and disaster risks. A hypothetical road maintenance deficit model informed by current literature on road maintenance was used to explain how cost of road maintenance increases exponentially if initial maintenance was not undertaken when the facility was newly constructed to draw the link between road maintenance and the risk of road accidents. Inadequate logistical support to address road maintenance backlogs in Vhembe district municipalities has been on the increase over the last 10 years. Current studies show that inadequate road maintenance can lead to the development of potholes – a major cause of road accidents and damages to motor vehicles. Literature on logistics support emphasises a comprehensive approach to road maintenance to provide a balance between funding, routine maintenance, quality of materials used for maintenance, use of stipulated specifications, the required maintenance technology, innovations and employment of qualified service providers to ensure quality roads and reduction of accidents on municipal roads.

Influencing of Combustion Ecology of Diesel Engines by their Intake Resistance

2014 ◽  
Vol 1059 ◽  
pp. 105-110
Author(s):  
Zoltán Záležák ◽  
Rastislav Bernát ◽  
Norbert Kecskés
Keyword(s):  
Pressure Drop ◽  
Diesel Engines ◽  
Rotation Angle ◽  
Intake Manifold ◽  
Measured Quantity ◽  
Air Filter ◽  
Compression Stroke ◽  
Exhaust Fumes ◽  
Air Cleaners ◽  
The Difference

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.

scholarly journals Testing Photovoltaic Pavers for Roadway Applications

2019 ◽  
Vol 4 (2) ◽  
pp. 86 ◽  
Author(s):  
Ronald A. Coutu, Jr. ◽  
David Newman ◽  
James Crovetti ◽  
Ashish Kumar Mishra ◽  
Mohiuddin Munna ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Construction Materials ◽  
Extreme Temperature ◽  
Cost Savings ◽  
Motor Vehicles ◽  
Safety Standards ◽  
Pavement Materials ◽  
Roadway Construction ◽  
Materials Used ◽  
Dynamic Loading Conditions

<p><em>Concrete and asphalt are the primary materials used to construct roadways for motor vehicles, bike paths for pedestrians and bicyclists, and runways for aircraft. Solar Roadways®, Inc. (SR) in Sandpoint, ID, proposed using robust, Solar Road Panels (SRPs) as an alternative roadway material due to the potential for creating a modular, multi-functional infrastructure product with cost-savings, user-safety, power-generation, and a better alternative in terms of environmental sustainability when compared to contemporary pavement materials. Typical roadway construction materials, on average, need to be replaced every 10-15 years while also requiring regular annual maintenance to maintain proper safety standards. SR’s novel roadway material is intended to extend roadway replacement timelines, lower annual maintenance costs, and provide energy to the power grid. In this study, we tested the mechanical properties of the “SR3” model prototype SRP and evaluated its suitability as a replacement roadway material with the added benefit of generating electric power. Specifically, we tested this unique pavement material in submerged water environments, under extreme temperature conditions, and under dynamic loading conditions.</em></p>

scholarly journals HYDROPHOBIZATION OF FINE CHALK

2021 ◽  
Vol 6 (6) ◽  
pp. 63-70
Author(s):  
Y. Krivenko ◽  
A. Vezentsev
Keyword(s):  
Calcium Carbonate ◽  
Carboxylic Acids ◽  
Granulometric Composition ◽  
Gas Adsorption ◽  
Cumulative Effect ◽  
Differential Distribution ◽  
Technical Literature ◽  
Grinding Method ◽  
Materials Used ◽  
The Moment

Natural fine chalk (calcium carbonate) is widely used functional filler for composite materials used in many industries. The development of in-depth studies of the physicochemical properties of hydrophobic chalk contributes to the expansion of its application. The analysis of scientific and technical literature has shown that at the moment there are no studies of the parameters of the porous structure and textural parameters of natural chalk of various granulometric composition, especially superficially treated (hydrophobized) with fatty carboxylic acids. Carboxylic acids of C17 to C20 fractions are practically applied for hydrophobization of calcium carbonate that is conditioned by presence of these acids with enough long hydrocarbon chains and reactive carboxyl group. The treatment of chalk with hydrophobizing additive gives it the following advantages over untreated chalk: prevention of moisture accumulation, absence of caking and improvement of technological properties (flowability, compatibility with polymer and others). The paper presents the results of chemical and mineralogical analyses of natural chalk from the Sheinsky deposit, data on the differential distribution of particles, the degree of hydrophobicity, and the study of the textural characteristics of natural and hydrophobized fine chalk. The influence of the grinding method on the granulometric composition is evaluated and the cumulative effect of the grinding method and hydrophobization on the texture characteristics of chalk is revealed. It is established that the surface treatment of chalk particles with fatty acids (C18 content not less than 65 wt%) affects the process of nitrogen gas adsorption

scholarly journals Operational properties of performance engine intake air cleaners

2018 ◽  
Vol 172 (1) ◽  
pp. 25-34
Author(s):  
Tadeusz DZIUBAK
Keyword(s):  
Flow Resistance ◽  
Fundamental Property ◽  
Filtration Efficiency ◽  
Filter Element ◽  
Laboratory Research ◽  
Air Filter ◽  
Engine Torque ◽  
Air Cleaners ◽  
Filtration Properties ◽  
The Impact

The paper presents an analysis of the design of air cleaners in performance vehicles. The paper confirms that their fundamental property is a much lower flow resistance compared to standard air cleaners. The consequences of replacing a standard air filter element with a performance one have been described. The impact of this modification i.e. an increase (decrease) in the engine torque and power output has been shown. A need to perform tests related to the filtration properties of performance air cleaners has been indicated. A methodology of laboratory research has been developed for performance vehicle air cleaners. The results of the research on the filtration efficiency and accuracy characteristics have been presented along with the flow resistance of air filter elements/air cleaners depending on the dust absorbance coefficient km. The accuracy of the filter element has been evaluated following a Pamas particle counter measurement.

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