Time filter

Source Type

Belgrade, Serbia

Knezevic D.,University of Belgrade | Tomic M.,University of Belgrade | Stajic V.,University of Belgrade | Petrovic V.,IMR Institute | Bulatovic Z.,Military Technical Institute Belgrade
Thermal Science | Year: 2015

Biodiesel is one of the promising renewable, alternative, and environmentally friendly biofuels that can be used in Diesel engine with little or no modification in the engine. The present paper investigates the combustion characteristics of single cylinder, naturally aspirated, air cooled, Diesel engine fueled with pure (100%) methyl ester of rapeseed oil, comparing to the corresponding characteristics when it was driven by diesel fuel. Combustion process analysis for both fuels was done at constant engine speed and at two load levels corresponding to the mean effective pressure of three and six bar. It was also concluded that the test engine can operate without problems, both with that fuel and with a lot of other biofuels and their mixtures that were used during long laboratory research.

Petrovic V.S.,IMR Institute | Jankovic S.P.,University of Novi Sad | Tomic M.V.,University of Belgrade | Jovanovic Z.S.,University of Belgrade | Knezevic D.M.,University of Belgrade
Thermal Science | Year: 2011

This review paper considers possible instrumentation for diesel engine fine par-ticles exhaust emission evaluation. The modern diesel engines have extremely low particles emission almost at the level of measurement error of existing gravime-tric measurement method. Since coarse particles are eliminated by new engine technologies, fine particles, with very negative effects on human health, dominate in the emission of current diesel engine. Therefore, it is necessary not only to measure mass of emitted particles but also to investigate other important particle characteristics as: particles number, particle size, particle number and mass dis-tribution, particle active surface, particle composition, etc. Therefore, existing measurement technologies used in aerosol science can be used also to study di-esel engine particles properties. This most common instrumentation in aerosol technique is shortly reviewed in the paper with special attention on candidate in-struments included in EU program on portable emissions measurement systems.

Petrovic V.,IMR Institute | Bracanovic Z.,IMR Institute | Grozdanic B.,IMR Institute | Petrovic S.,University of Belgrade | And 2 more authors.
FME Transactions | Year: 2015

An appropriate type of dilution tunnel is chosen, based on the international standards, user's needs and the manufacturer's requirements. During the design process, a number of restrictions specified in the standards for emission and Venturis were taken into account. The data required to address basic concepts were obtained from numerous emission tests performed at the IMR Institute. A short algorithm of calculation of the critical flow Venturi (CFV) is also presented. Specific attention is paid to the problems of the measurement of particulate emissions using the dilution method, which does not allow us to use the unique thermodynamic and flow parameters. A method of evaluation of particulate emissions for two extreme cases which were expected during the tests was adopted. Using the results of calculations, a full flow dilution tunnel with CFV was manufactured and tested at the IMR Institute. © Faculty of Mechanical Engineering, Belgrade.

Jankovic S.,Faculty o Technical Science M. Pupin | Kleut D.,Faculty o Technical Science M. Pupin | Blagojevic I.,University of Zagreb | Petrovic V.,IMR Institute | Sinik V.,Faculty o Technical Science M. Pupin
SISY 2011 - 9th International Symposium on Intelligent Systems and Informatics, Proceedings | Year: 2011

The implementation of various electronic subsystems in different kinds of on-road and off-road vehicles is constantly expanding. Accordingly, the new vehicles, instead of being mechanical systems, become advanced mechatronics systems whose development and testing call for a new approach. The possibility of using data available on vehicle network presents itself as an extremely powerful tool. This paper deals with a new approach for service load data measurement and acquisition as a helpful tool in developing and testing of different mechatronics vehicles' systems. The new approach is based on hardware and software platform oriented to main vehicle controllers with the task to acquire relevant transmission service load data. The said hardware as well as software utilities have to enable computer based monitoring of the vehicle systems behaviour and in that way to be the tool for new vehicles' development. The new system was tested in real service. The system significantly lessened time of vehicle instrumentation before testing and enabled accurate data acquisition. © 2011 IEEE.

Discover hidden collaborations