Designing technological marketing mix (TM-MIX) in differenttraffic, transport and telecommunication systems has abasic feature of a 'decision-making problem' (DMP ). The paperdiscusses mathematical constructs and procedures applicablein developing TM alternatives and in the choice of the bestcombination (composition) ofTM-mix. Algorithm for solving a'General Choice Problem' is presented. Expert Choice Softwareand other decision-support tools have substantial theoreticalsupport in the denoted concepts, procedures and algorithms.

Wo Treibsto.ffe verbrannt werden, entstehen auch Emissionen.In der aktuellen Situation gehoren also Fahrzeugemissionenzu den Hauptthemen. Die Hauptanteile der Abgasemissionenentstehen bei den heutigen katalytischen Abgasnachbehandlungen wiihrend des Kaltstarts und der Kaltlaufphase,solange der Katalysator seine optimale Betriebstemperaturnoch nicht erreicht hat. Dies gilt besonders fur die HC-Emissionen./m Bemiihen, die Luftqualitiit in den europiiischen Uindemund vor allem in den GrojJstiidten zu verbessern und den Vorgabender Weltgesundheitsorganisation (WHO) anzupassen,entwickelt die Kommission der EU eine Serie von Direktivenzur Senkung der Schadstoffemissionen der Strassenfahrzeuge.Um dieses Ziel zu erreichen, hat die Kommission vor etwa zweiJahren zusammen mit den Verbiinden der europiiischen Automobil-und Mineralolindustrie ein gemeinsames Programm(das 'European Programme on Emissions, Fuels & Engine technologies' EPEFE) aufgestellt. Dieses beinhaltet gemeinsameForschungsprogramme, Abgastests sowie Kosten-Nutzen-Analysen.

This paper deals with the model for determining the capacityof a river port. The basic parameters of the model are determinedby the size of the aquatorium and the possibilities of locatingquays in the dock basin as well as their number. Thenumber of quays and the static and dynamic capacity of theport - harbour depend on the sizes of the vessels planned fordocking. The analysis considers the push tows Europe 1 and 2and the Danube barges on the basis ofwhich the length of theoperative coastline is determined which in turn is related to the/,ength of the railway tracks, roads, and cargo depots.

The paper studies the regeneration possibilities of Dieselexhaust particle filters, as well as the resulting problems.The application of exhaust particle filters is more and morerequired, because of the increasingly severe limitations imposedon the exhaust emissions of the Diesel engine vehicles.They are particularly necessary on lorries and buses. The particlestrapped in filters increase the counterpressure in the exhaustgases and reduce the engine performance. The most suitablemethod for perfO!ming regeneration is to bum the combustibleparticles trapped in the filter.The temperature of the Diesel engine exhaust gases in thementioned vehicles is not high enough to ignite the particles.To reach the temperatures higher than 550°C, certain measureshave to be undertaken. There are efficient measures outsidethe engine or their combination with measures within theengine.The paper deals especially with measures undertaken outsidethe engine, such as heating the filter using a burner, electricheater or microwave energy, use of fuel additives or applicationof a catalyser.

Basic requirements related to fuel injection system of upgradedturbocharged articulated truck diesel engines are listedand discussed. An example of the FIE matching approach toupgrading of a heavy duty diesel engine is presented. The applicationof hollow cam fuel injection pump may offer a furtherextension of its use in order to uprate diesel engine peiformance.

There are more than 100 million cars driving on the roadsof Europe, and as many as 40 million only in Germany. Theaverage driving life of an automobile is 13 years. In Gemwnyabout 2.8 million cars are discarded annually, and in Europemore than 10 million passenger cars.In taking care of the old cars, the question is whether toseparate the precious metals from the catalytic converters, as itis known that the car manufacturers have had to install catalyticconverters in the cars in the EC countries starting from JS'April 1993, in order to reduce the harmful exhaust emissions.Collecting of catalytic converters and retrieving of preciousmetals has first started in Europe in 1971. By the year 1994 thequota was estimated at about 450 kg of platinum and 90 kg ofrhodium, and these numbers are expected to increase gradually.A car is not a homogeneous thing. By disassembling it, themetal elements reach the foreseen quota of reusability. There isa greater problem with non-metals, one part of which ends upat the dumping place. The car users take out from the old carpartly the propelling fluid and the cars are disassembled intosingle parts that are being sold directly or recycled. Takingcare of cars has not been organized up to now. The owner hadto pay taxes for that, according to the car type.The system of providing for the cars in the future should bea network one. A network system achieves in cooperation withthe existing car owners a regionally demarcated disassemblingnetwork. The network system takes over, apart from networkdistribution, also the future coordi1wtion net and forms a connectingpoint for the car manufacturers and the recycling ofsecondary raw materials.

ELGREGO SYSTEM startet den Dieselmotor bei extremniedriegen Temperaturen, sogar bis -30°C als wi:iren Sie in denTropen bei +30°C.Stellen Sie sich das Starten eines Dieselmotors bei -30°Cvor. Frost, zugefrorene Leitungen, zehjl.Ussiger Treibstoff,schwache Baterie und vor lhnen nnoch viele Kilometer bis zumZiel.In weniger als 10 Minuten erwi:irmt das ELGREGO SYSTEMden Dieseltreibstoff auf ungefi:ihr- 1 C und ermoglicht soden sofortigen Start des Motors.104Das ELGREGO SYSTEM verhindert das Zufrieren vonLeitungen, Verdickung des Treibstoffs oder das Zufrieren vomWasser bei niedrigen Temperaturen so das die Batterie denMotor mit Leichtigkeit starten.LKWs, Busse, Traktoren, Buldoser und andere lndustriemaschinendie Dieseltreibstoff verbrauchen, werden Dank desELGREGO SYSTEM auch bei niedrigen Temperaturen problemlosstarten und fahren.Des ELGREGO SYSTEM garantiert einen minimalenstromverbrauch von nurl3,5 A.M it dem ELGREGO SYSTEM sparen Sie Zeit, Geld, Treibstoffund lhre Nerven, den lhr Motor und Leute werden rechtzeitigmit der Arbeit beginnen.

The contens, activities and practical methods of the programmreliability of the vehicle are showed. The programmcovers all the phases in the development of the vehicle: concept,design, testing, production and documentation. The programmis based on the relevant parameters of reliability andmaintainability of the vehicle which we can use to define'weakly places', colective Loading and there duration. The programm reliability is made on the form of diagramm flowwhere we have defined requirements of the users, flow and thecontens of the programm activities, expected effects, controlpoints, ...

Vectored propulsion is a new concept of aircraft attitudecontrol by engines jet-deflection. Thrust vectoring researchhas become actualized during the last ten years, mainly formilitary application.The carried out experimental projects confirm the effectivenessof the thrust-vectoring systems in both conventionalaircraft attitude control and post-stall maneuverability enhancement.Apart from military aviation, the results of thrust-vectoringresearch are applicable in civil aviation, especially in STOLand VTOL aircraft design.

In the production of motor vehicle assemblies, as well as ofentire motor vehicles, apart from taking into consideration andadopting a whole range of regulations, standards, conditions,etc., it is ve1y important to carry out the designing and productionin such a way as to enable greater uniformity and replaceabilityof elements and assemblies in a possibly greaternumber of other assemblies and entire vehicles.Greatly increased production of motor vehicles in manycountries of the world, together with the total increase in thenumber of produced vehicles, as well as the frequent change ofmake, result in an incredibly large number of items, components,in the production.Standardization and unification of production to typicalsamples would result in huge savings, at the same time providinghigher quality, reliability and life time of the product. Moreeasily applicable and less expensive automation would providegreater productivity. Basically, the product would be technicallyeasier to use, maintain, and overhaul. Less rime and lesseffort would be needed for the qualified staff to be trained inthe maintenance and overhaul operations.

The article deals with the problem of assessing the optimalvolume and period for the replacement of ship equipment. Theintroduction analyses the character and the volume of technicalmaintenance and the repair of the ship equipment, certainassemblies and elements of that equipment. Possible tasks andvarious ways in which they can be solved are defined. The statisticalmodelling of random processes is particularly stressed.Eventually, the numerical example of statistical modelling oftechnical maintenance and the assessment of the optimal replacementperiod of the ship pump bearing is given.

The objective of all the braking systems fitted in vehicles isto reduce the speed, as well as to keep them at a standstill. Inorder to increase the active road traffic safety, the experts inthe leading vehicle manufacturer companies are trying from day to day to find a more efficient solution of the highest possiblequality. Braking problems, i.e. problems of stopping the vehiclesare closely related to time, forces, momentum, mass andother physical quantities. This is best seen in the braking ofheavy duty vehicles, trucks, buses, where the braking efficacyis questionable due to high inertia forces caused by heavyweight and more recently relatively high speeds. Such vehiclesare fitted with system of brakes that operate on compressed airor combination of pneumatics and hydraulics, since the driverhas not got enough power to achieve appropriate braking effect.However, the biggest problems occur by trucks runningdownhill, when the braking system is operated continuously fora longer period of time. This causes heating and overheating ofthe system elements ('fading'), thus reducing the braking effect.In extreme cases, particularly if the system is poorly maintained,it can eventually fail completely.Because of the mentioned reasons for difficulties in brakingof trucks, such vehicles have been recently fitted with anauxiliary slow-down system. This system is completely independentfromthe main one on the wheels and is used exclusivelyfor slowing down or for maintaining of speed.

In the article is given some acceptable metodology for projectingand designing of complex mechanical systems as like asvehicle, construction and other, ... with consideration of themaintenance and vehicle maintenability. The analysis is orderedon the problem of bilding the structure of product andtheir functional or designing decomose. At the same time it wasdiscused about level of the structure regarding to requirementsto easy maintenance. The modularity structure of a vehicle isthe condition of modern and effectivenes approach to maintenancewith complitly infOimation support.

Respecting the requirements for preservation and protectionof the environment, the present day is marked by implementation of legislative regulations in order to reduce the adverseeffects of transport vehicles.The increasingly strict eco-regulations in air traffic areaimed at reducing the aircraft engine emissions and gradualelimination of noise producing aircraft.Apart from the USA, operational restrictions have been announcedalso by other ICAO members, such as the ECACcountries, Australia, Japan and New Zealand.In spite of a good geo-traffic position and the tendency ofintegration into the European and world traffic routes, Croatiahas found itself, due to the process of gaining independence,defending its vital national interests and organization of civilaircraft authorities, lagging behind with the implementation ofthe present international regulations regarding environmentalprotection criteria in aircraft operations.

Among all auxilimy units of the air cooled diesel engine acooling fan is the noisiest. One of the noise generation mechanismsis the blade interaction with the vortices occurring in theradial and axial clearances of the fan due to the pressure differencebetween the pressure and suction side of the rotorblade. This mechanism of noise generation is especially distinctif the fan is operating in a heavily loaded condition, i.e.,at partial flow rate, when the pressure differences are greater._In this paper the effects of radial and axial clearances betweenthe rotor and stator of the fan on the emitted noise and performances of the fan will be presented and discussed. The experimentalresults have shown that the radial and axial clearancehave its optimum with regard to the best value of emittednoise, performances, dimensions and technology of productionof the fan.