2nd ICAI 2022

International Conference on Automotive Industry 2022

Mladá Boleslav, Czech Republic

period). Following this procedure is simpler, however, it can be taken for only one data record, • spread the measured load range into the selected number of levels and provide schematization into these levels. Following this method, this procedure is somewhat more laborious, but it will allow us to create partial schematizations provided for different periods, for example, in our case, for partial car routes taken under different conditions (in town, on a motorway…). Subsequently, it will allow us to combine these sub-routes and re-calculate one equivalent load value for the selected route combination. It will also make it possible to evaluate and compare the damaging effects of sub-entries. The following text describes the procedure following this point. The principle of schematization for the force record is shown in a simple example in Figure 5. In the first step, it is necessary to determine the total scope of the record, which is here ranging from +9.6 kN to -8.1 kN. Therefore, the total range for the schematization was chosen as ±10 kN and 20 moment levels, as in this case, one layer has a range of 1 kN. The next, schematization is performed by determining the number of occurrences of a sample recorded in each level (for example, on the range of (level) 2.000…2.999 kN, 9 occurrences of measured samples were found).

Figure 5: The principle of level schematization

Source: own elaboration (2022)

3. Problem Solution The above procedures can be used only if we know the real load spectrum, i.e., the actual load on the component from the actual (or simulated) operation of the given machine. Therefore, an experiment was carried out in which the load spectra of a passenger car drive system were determined. 3.1 Obtaining a load spectrum A Škoda Fabia 1.4 TDi 55 kW passenger car was used for the measurements. On the driving half-shafts, strain-gauge torque sensors were installed together with antennas for contactless signal transmission produced by the company ESA Messtechnik (Fig. 6). This system also included a magnetic sensing of the revolution of the current

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