International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

National and international transport of dangerous goods in Slovakia is exercised by the European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR). All shipments covered by this agreement remain subject to national and international road traffic regulations, international road transport and international trade.

The article is about the possibilities to diagnose the technical state of transfer mechanism of road motor vehicles. The diagnostic is done on a performance dynamometer, which measures the resistance of transfer mechanism during the coasting of rolling mass. The resistance makes itself felt like power losses by the movement of vehicle, which afects directly dynamical characteristics and fuel consumption. By the measurement we can quantify its value, what is the sign of the technical state of the mechanism.

Automobile shock absorbers are an important part of the vehicle suspension, which directly affect the driving comfort and maneuverability. Therefore, they direct impact on the safety of their operations. Wrong technical condition of the car shock absorbers can cause extension of braking distance by up to 20%. In actual service station practice, the automotive shock absorbers are diagnosed by several methods. This article presents the results of measurements of automotive shock absorbers on various diagnostic devices. During testing, on the vehicle there were replaced shock absorbers and they were compared with the results of the technical condition before and after the exchange.

Fuel consumption is one of the most important operating characteristics of road vehicles. In operation of road vehicles there we usually express fuel consumption in l/100 km for driving performance, or l/h when the car engine is idling. The fuel consumption can be quantified by several methods, and it affects a number of factors (driver, vehicle, and environment). It can be considered as a posteriori consumption, i.e. operational consumption. The priori fuel consumption (inserted, pre-defined) based on the construction properties of respective engine. Most often it is the priori fuel consumption expressed by measuring the effective consumption, which defines the amount of fuel consumed per unit of effort and time. It is usually quantified at a time when the engine is mounted to the vehicle itself. The contribution presents a practical example of measuring the effective fuel consumption in operation of road vehicles.

The fuel consumption of road vehicles is influenced by many factors. One of them is the acclerator position. Measurment of the fue lconsumption on a rollingstand was done for the quantification of this effect. The tested vehicle was Kia Cee´d with a petrol engine. The measurments were done in laboratory condiditons to give higher accuracy. The results describe the degree of the effect of the accelerator position. They can be used for the determination the position considering to the actual output power of the engine and for the detrmination of the correctly driver behavour. The correctly usage of the accelerator contributes to the reduction of environmental burden of transport.