Transport and Communications

Permanent URI for this communityhttps://drepo.uniza.sk/handle/hdluniza/254

Transport and Communications is an scientific journal intended to bring together the information in different areas of transport and communications. The aim of this journal is to combine theory and practice in the field transport and communications and thus advancement of transport and communications sciences. It will provide a platform for academicians, researchers and engineers to share their experience and solution to problems.Journal is indexed in database Index Copernicus.

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Author: search.filters.author.Rievaj, VladimírStart date: 2017

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Now showing 1 - 5 of 5
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    Driver Training
    (University of Zilina, 2018) Rievaj, Vladimír; Gaňa, Ján; Figlus, Tomasz
    Road transport has become a very important part of supply chain management. The large number of vehicles in op-eration requests large number of qualified person to operate them. The lack of young person interested in this job and obstacles in the training and qualification process result in current labour market state when large number of person are missing.
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    The Impact of Using Trailers on the Fuel Consumption
    (University of Zilina, 2018) Synák, František; Rievaj, Vladimír; Semanová, Štefánia; Palúch, Ján
    The amount of fuel consumed may also be influenced by driving style, speed as well as by the need for the use of passenger car trailers. This paper deals with the impact of using such trailers on the amount of fuel consumed. Measurement of the impact of the passenger car trailer on fuel consumption was carried out during driving at constant speed and during acceleration. The measurements were performed by driving test on a flat road. The first part of the paper deals with the driving resistances which influence fuel consumption during driving at constant speed and during acceleration on the flat road. The second part describes the vehicle used for measurements and measuring equipment. The conclusion of the paper includes the principles to reduce the impact of passenger car trailers on the amount of fuel consumed.
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    The impact of roof box on fuel consumption
    (University of Zilina, 2017) Synák, František; Rievaj, Vladimír
    Passenger vehicles are major petroleum consumers and contributors of greenhouse gas and criteria pollutant emissions in many countries around the world. The amount of fuel consumed affects the environment, status of health of human population as well as financial costs that are associated with vehicle operation. The roof box is one of the often used vehicle attachments. The aim of the paper is to measure the increase of fuel consumption affected by an installed roof box. The impact of roof box on the increase of fuel consumption is measured at the speeds of 50 km.h-1, 90 km.h-1 and 130 km.h-1. The introduction of the paper describes particular harmful constituents of exhaust gases and their effects. Another part of the article includes the methodology of measurement and its results. The last part of the article involves the evaluation of results and recommendations relating to reduction of the increase of fuel consumption affected by roof box.
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    Temperature of the brakes and the Braking Force
    (University of Zilina, 2017) Rievaj, Vladimír; Mokričková, Lenka; Synák, František
    The kinetic energy of the braking vehicle is changed into heat and the resulting heat increases the temperature of each part of brakes. The changed temperature affects the coefficient of friction between the brake lining and brake drum of brake disc. Unless the brakes are actuated hydraulically there is the warning brake pads and brake fluid. Object of examination in this article is the impact of repetitive braking to change of these parameters and the impact of time to change the boiling point of the brake fluid.
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    Measurement of Impact of Air Filter Cleanness on a Change of Engine Speed Characteristics
    (University of Zilina, 2017) Synák, František; Rievaj, Vladimír
    The paper is focused on the impact of clogged air filter on a change of speed characteristics of spark-ignition engine 1.4 MPI, 16V, 74 kW. The clogged air filter can cause deterioration in engine charging. Less air means the possibility of burning smaller amount of fuel, and thus less energy brought to the engine. This should cause a change in the size of engine torque and its power.