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In recent years, the development of computer-aided design systems and manufacturing changes significantly the method of structural and technological works. Method that allows for the rapid introduction of a new product on the market is concurrent engineering. Due to the high costs of hardware and software and the lack of appropriate staff this method is not available to many, especially small manufacturing...
The article describes the impact of toxic components of exhaust gases on the environmental pollution and the resulting problems that have a direct impact on human health. It presents the legal regulations in force in the European Union which oblige vehicle manufacturers not to exceed the limit values for emissions of toxic exhaust components. It shows the influence of the motor vehicle speed on the...
The paper presents the results of a statistical analysis of real-world driving cycles recorded in the Poznan agglomeration. The analysis was carried out in order to find out possible relationships between the average speed and other statistics describing speed profiles at the level of individual road sections (e.g. average speed, average acceleration/deceleration, number of stops etc.) in order to...
This paper presents methodology to determine the contribution of each motion resistance in mechanical energy demand based on real life speed profiles. Example results are also shown based on data obtained in different traffic conditions: urban, highway, extra urban. Article includes theoretical basics of calculation of mechanical energy demand, means to obtain data by means of a Smartphone, and description...
The results resistance of loss motion diesel engine for different temperatures of lubricating oil is presented in the paper. Tests were performed to evaluate the effect of lubricating oil temperature of friction losses in engine. In addition to friction losses in the bearings of the crankshaft and a group of piston rings – piston – cylinder, the friction loss due to charge exchange in the cylinder...
Vibro-thermography is a new Non-Destructive Inspection method that can be applied to the diagnosis of aircraft fuselage parts and wind turbine propeller blades. In this method, the ultrasound source of energy is used to excite internal particles of the examined composite material damaged by an impact to induce thermal differences between the solid part of material and the damaged area. The results...
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