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

The paper focuses on the evaluation of the quality of fillet welds produced robotically by the method of impulse synergic welding MAG. This welding technology is used in the automotive industry in the production of rear seat backs for passenger cars. In the process of automated production, the speed of the process, accuracy, and quality of the made joints are important. Several factors affect the accuracy and quality of welded joints. The paper presents the results of research where the influence of filleting of fillet welds on their quality was confirmed. Visual and capillary methods were used to determine the quality of welds, metallographic analysis for evaluation depth of weld root penetration, strength properties of welds were evaluated by static tensile test. Statistical ANOVA methods were used to process the obtained values. Experimental work confirmed that the depth of welding of the weld root into the base material has the greatest influence on the final quality of fillet welds. It is this parameter that results in the elimination of the weld and thus the entire produ ct.

The paper looks at the relation between the number of transport domains (cars, trucks, buses, ship, etc.) and the size of data, generated in fleet management software. Nowadays, such software is stored and run on a cloud and users do not need to care about the size limitation, just for the price. If using a solution on premises, the cost includes creating and supporting infrastructure and licences. Software developers should care for the scalability of the application time and also managing bottlenecks, that are likely to appear in data flow due to the size of the management program.

The electromagnetic fuel injectors automotive are the gasoline injection systems main elements. The injectors perform the gasoline injection and its time of open condition, i.e injection duration determines the fuel quantity per working cycle [1]. The injectors are activated by solenoid and inject the gasoline in the engine manifold at the system pressure [2]. The gasoline injectors ensure precise fuel metering according to engine work state. The injectors are controlled by control signals, whose parameters are defined by the engine management system. The control devices are power transistors (drivers) in the electronic control unit (ECU). The injectors synchronizing and speed activating has a special significance and influence upon the increasing of the power and efficiency and the decreasing of the harmful emissions of the automotive engines. The synchronization of the electromagnetic gasoline injectors is connected by one hand of the injection according engine work order and by the other – with equal fuel injection duration and injection quantity. Meanwhile the injectors work at such conditions, which imposed constant compensation and adaptation activities by the ECU. This circumstance is connected with requirements of speed activating, which is measured by indicators, such as minimal electromagnetic activating force and minimal opening and closing time. This paper is considered the method of calculating the electromagnetic parameters of the automotive electromagnetic gasoline injectors for manifold gasoline injection.

The objective of the present study is to experimentally investigate the thermal comfort inside a car cabin. During the experimental campaign the occupants filled out questionnaires on the thermal sensation vote. The questionnaire contained questions about the local and global state of comfort and were performed according to ISO 14505-3 / 2006 and ISO 10551 / 2001. Each experimental session lasted 30 minutes and each occupant completed four questionnaires as follows: a questionnaire at the entrance in the car cabin, and afterwards one questionnaire every 10 minutes.