Tag Archives: vehicle

1918–1926 M. Hruška
Assessment of luggage compartment parameters based on the preferences of a heterogeneous driver group
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Assessment of luggage compartment parameters based on the preferences of a heterogeneous driver group

M. Hruška

Czech University of Life Sciences, Faculty of Engineering, Department of Technological Equipment of Building, Kamýcká 129, CZ165 21 Praha 6, Czech Republic
*Correspondence: jabko@tf.czu.cz

Abstract:

This work deals with the assessment of driver preferences in the area of passenger car luggage compartments. The data collected is compared to that of real vehicles from the full range of passenger cars available on the European market. The data used for the research described in this work was obtained using a questionnaire survey on a large heterogeneous group of drivers in the Czech Republic. All of the research participants had three categories of vehicles available during testing – for better imagination and the possibility of personal comparison of parameters. The collected data was subsequently subjected to statistical evaluation, where mainly statistically significant dependencies in the preferences of individual drivers were sought out given their personal and anthropometric parameters. On the basis of the statistical evaluation of the obtained data, a difference was found in the preferences of the types and dimensions of the individual luggage compartments for the individual respondents depending on the selected parameters. The results of this work can be used in the process of designing luggage compartments of passenger cars, in particular with regard to the specific needs of drivers. The results of the work could thus contribute to improving the safety in handling cargo in the luggage compartments of vehicles and to improving health protection.

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1017-1024 J. Hart and V. Hartová
Testing of ISM band at remotes for unlocking vehicles
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Testing of ISM band at remotes for unlocking vehicles

J. Hart¹* and V. Hartová²

¹Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings, Kamýcká 129, CZ165 00 Prague, Czech Republic
²Czech University of Life Sciences Prague, Faculty of Engineering, Department of Vehicles and Ground Transport, Kamýcká 129, CZ165 00 Prague, Czech Republic
*Correspondence: janhart77@gmail.com

Abstract:

Every modern car has a remote control for wireless unlocking. Wireless drivers for unlocking the vehicle using frequency in the ISM bands. ISM bands are unlicensed bands. They are usually used for industrial, medical and scientific purposes. The question is whether wireless transmission parameters are sufficient and do not violate defined range of ISM band. Another important aspect is the security of the wireless transmissions and any other signal interference. The problem of interference plays an important role in ensuring the quality and safety of wireless communications, especially when wireless networks can be found everywhere. The issues of remote control vehicles is very important due to the resulting security of a guarded vehicle. One of the major risks that may occur are data transmission that the signal is blocked by another signal and the end user does not notice. In this case, does not lock the vehicle nor ensuring its securing security system. Tests which were performed accurately determined the bandwidth of broadcast remote control for each vehicle. Vehicles for which the tests were conducted are standard vehicles used to frequent occurrence. These are the following types: Alfa Romeo, Hyundai, Mercedes, Škoda and Toyota. Subsequently, the analysis was performed of transmission compared with standard broadcast of jammers. All test drivers worked in the band ISM433. These tests clearly demonstrated that not every manufacturer strictly observes ranges of ISM band. This may affect traffic on surrounding licensed bands.

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533–539 H. Marušková and K. Pluhař
Quantitative research SME and STK in the Czech Republic
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Quantitative research SME and STK in the Czech Republic

H. Marušková* and K. Pluhař

Czech University of Life Sciences Prague, Faculty of Engineering, Department of
Vehicles and Ground Transport, Kamýcká 129, CZ 165 21 Prague 6, Czech Republic
*Correspondence: maruskova@tf.czu.cz

Abstract:

The article deals with the emission control stations (SME) and technical inspection stations (STK) in the Czech Republic. The increasing number of vehicles and their operational age has significant impact on these stations. The nowadays situation in the both stations does not react adequately to the changing conditions. The use of quantitative research, which was conducted through an Internet poll in September 2015, obtained responses from SME and STK staff, as well as from the public. The questionnaire didn’t show substantial dissatisfaction with the current controls on SME and STK and there is no urgent need for immediate and major changes, but rather the need for continuous improvement and better control on SMEs, at least as at STK, i.e. the introduction of a central information database (preferably shared by STK and SME) and a camera system for better control. The cardinal question is not whether the existing emission checks on vehicles in no-load mode of the engines are able to detect all faults.

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1601-1608 M. Hruška and P. Jindra
Ability to Handle Unfamiliar Systems in Passenger Cars According to Driver Skills
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Ability to Handle Unfamiliar Systems in Passenger Cars According to Driver Skills

M. Hruška¹* and P. Jindra²

¹Czech University of Life Sciences, Faculty of Engineering, Department of Technological Equipment of Building, Kamýcká 129, CZ 16521 Praha 6, Czech Republic
²Czech University of Life Sciences, Faculty of Engineering, Department of Vehicles and Ground Transport, Kamýcká 129, CZ 165 21 Praha 6, Czech Republic
*Correspondence: jabko@tf.czu.cz

Abstract:

This paper addresses the ability of drivers to intuitively control special passenger car systems that they have as yet not encountered in the course of their driving practice and therefore have no experience of them. The study described in this paper was conducted on a sample group of drivers without any prior experience of the tested model or of any other model of the same brand, and the functions and systems selected for testing were unique for the brand and model in question. The reason for conduction of this study was the endeavour to recreate the common situation in which a driver is forced to drive a car with whose controls he/she has not yet had the opportunity to become acquainted. Based on statistical evaluation of the obtained data, it proved that the initial hypothesis claiming the existence of a correlation between driver parameters such as age, gender or length and quality of driver experience and his/her ability to adapt to completely unknown car control systems could be confirmed. The results in this paper may be applied in the cabin and car control system design process, thereby enhancing the user-friendliness of passenger car controls, thereby also indirectly increasing road traffic safety.

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1332-1341 M. Kotek, P. Jindra and J. Mařík
Speed limits and their impact on emissions production and fuel consumption
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Speed limits and their impact on emissions production and fuel consumption

M. Kotek, P. Jindra* and J. Mařík

Czech University of Life Science Prague, Faculty of Engineering, Department of Vehicles and Ground Transport, Kamýcká 129, CZ16521 Prague, Czech republic
*Correspondence: jindrap@tf.czu.cz

Abstract:

The article deals with emissions and fuel consumption of road vehicles in real traffic conditions. The aim of this study was to prove or disprove correctness of the decision of Prague city government to change the speed limits from 70 km h-1 to 50 km h-1 on the parts of one main road leading to/from Prague. For measurements in real traffic conditions was used 2 typical Czech cars Skoda with manual transmission (Fabia 1.2 MPI with petrol engine and Octavia 2.0 TDI with diesel engine). Measurements were performed on both of directions on defined road segment.

At speed 50 km h-1 the measurement was repeated 5 times at 3rd and 5 times on 4th gear. Similarly at speed 70 km h-1 the measurement was repeated 5 times at the 4th and 5th gear. The aim was to operate the vehicle in the normal engine loads.
The results demonstrate the fundamental assumption that at the higher allowed vehicle speed the engine is more loaded and therefore produces a higher amount of emissions, but according to a higher vehicle speed the emissions are produced on the defined segment for the shorter time. A similar trend is evident even in fuel consumption. The results also indicate the depending on the power reserve of specific vehicle. When the vehicle is more powerful, higher permitted speed is preferable.

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