Trans Motauto World
Vol. 11 (2026), Issue 2

Table of Contents

  • TRANSPORT TECHNICS. INVESTIGATION OF ELEMENTS. RELIABILITY

    • Dynamic analysis of hoist elevator for the case of load lifting

      pg(s) 50-54

      The paper examines a specific type of industrial elevator known as the hoist elevator that is used for lifting and lowering various materials. These elevators are used in various construction yards and usually are mounted close to the building being constructed. The elevator consists of many mechanical and electrical parts, and besides lifting and lowering the loads and the cage, it needs to stop at a certain height to unload. The vertical motion process is controlled by the operator on the ground. The work operation analyzed in this paper is load lifting from the ground up to a certain height. During this process, the elevator is heavily loaded, and oscillations will appear due to the lifting process. The type of analysis is dynamic analysis, and the methodology consists of 3D modeling of the elevator and carrying simulations with SimWise 4D software. This enables analysis of the lifting dynamics and identification of the nature and extent of forces, torques, and stresses on the elevator parts and the form and intensity of the oscillations. Results will be presented in graphical form and discussed. Conclusions from this study will be useful for motion dynamics, strength of elevator parts, and safety at work. The Hoist elevator is modeled based on the technical data from the manufacturer.

    • Evaluation of Adhesively Bonded Joints for Repair of Exterior Automotive Plastic Parts

      pg(s) 55-61

      This paper deals with the possibility of renovating exterior plastic automotive components using adhesive bonding technology. The research focuses on the evaluation of the shear strength of adhesive joints formed using adhesive systems commonly applied in automotive repair practice. The experimental investigation was carried out using selected adhesives, and the shear strength of the bonded joints was evaluated. To simulate real operating conditions of vehicles, accelerated laboratory tests were performed in which the bonded joints were exposed to various degradation environments. Subsequently, changes in the shear strength of the adhesive joints were evaluated after their exposure to these conditions. The study also examined the influence of road de-icing agents commonly used in winter road maintenance on the quality and integrity of the adhesive joints. Based on the analysis of fracture surfaces, the failure mechanisms of the joints were identified and classified as adhesive or cohesive failure. The obtained results provide a basis for assessing the applicability of adhesive bonding technology for the renovation of exterior plastic automotive components and contribute to the optimization of repair procedures used in automotive maintenance practice.

    • Application of SPC statistical process control method and measurement analysis of welded steel components in the motorcycle industry

      pg(s) 62-67

      Variability is a fact of industrial production. Every process produces products that are not exactly the same. For successful quality control and management, several different methods of preventive quality assurance have been developed in the early stages of the product development process. The SPC method is used in conditions from the initial process batches and in the stages of serial production. The SPC statistical process control method is indispensable for a modern, future-oriented manufacturing company. In this paper, I would like to present the SPC statistical method on a practical example from the motorcycle industry, with measurement results under the conditions of the first pre-series of a complex welded steel component.

  • TRANSPORT. SAFETY AND ECOLOGY. LOGISTICS AND MANAGEMENT

    • A new paradigm for analyzing the work of transport operators based on sEMG and MyoMotion studies

      pg(s) 68-71

      The article presents a new paradigm for analyzing the work of transport system operators, based on the use of surface electromyography (sEMG) and the MyoMotion motion analysis system. The proposed approach is illustrated through the example of a paramedic performing a selected medical procedure in a medical ambulance. The conducted study enabled the identification of working postures adopted during the execution of the selected medical procedure under real working conditions. The analysis included simultaneous measurement of muscle activity and recording of movement kinematics, allowing for a comprehensive assessment of biomechanical loads. The obtained results indicate the high utility of the proposed approach in identifying risk factors associated with musculoskeletal overload and provide a basis for developing more effective ergonomic interventions in the working environment of transport operators.

    • Methodological foundations for the organization of local transport systems in Georgia

      pg(s) 72-74

      The development of market economic relations in Georgia requires the application of management principles that take into account the interests of management objects. Consequently, there is an objective need to apply logistics management methods at both micro and macro levels. In this study, a transport-logistics polygon has been investigated. The initial study of the transport-logistics polygon demonstrated that, at the initial stage of analysis, it is necessary to determine the possible combinations of logistics channels constituting the transport-logistics polygon. Since market relations provide a wide variety of transport service forms, the selection of potential local transport systems represents a search process. An algorithmic block diagram for studying the transport services market has been developed, along with recommendations for planning and organizing technological processes of local transport systems in Georgia.

    • Simulation Modeling of Vehicle Passage Over a Road Irregularity for Forensic Accident Reconstruction

      pg(s) 75-79

      A planar dynamic model of a vehicle is proposed, incorporating a radial-spring tire model that accounts for the longitudinal component of the elastic force arising from tire deformation. The model enables the analysis of vehicle response when either the left or right wheels encounter a road irregularity, thereby allowing the assessment of its impact on handling and stability. Although relatively simple, the proposed model provides sufficient accuracy for applications in car accident reconstruction. The model has been validated and has been applied to an actual road situation.

    • Analysis of the Effectiveness of Remediation of Identified Hazardous Locations in the Republic of Croatia

      pg(s) 79-82

      The safety of road network users is a fundamental goal of a modern transportation system. Safety is most commonly assessed by the number of traffic accidents and the severity of their consequences. In the Republic of Croatia, hazardous locations on the road network are continuously identified, and their remediation plays an important role in reducing the number of traffic accidents and mitigating their consequences. This paper analyzes the extent to which the processes of identifying and remediating hazardous locations have contributed to reducing the number of traffic accidents. The research includes a comparative analysis of a three-year period before and a three-year period after the implementation of remediation measures, with the objective of providing relevant insight into the effectiveness of the applied measures and their contribution to increasing road safety.

  • VEHICLE ENGINES. APPLICATION OF FUELS TYPES. EFFICIENCY

    • Development of a methodology for improving the performance of diesel engines using the acoustic emission method

      pg(s) 83-85

      The main concept concerns the application of the acoustic emission (AE) method to develop a methodology for real-time monitoring and diagnosis of the technical condition of diesel engines, which will reduce the time required for repair and maintenance. The investigation of new signal-processing tools is one of the most topical research areas in the contemporary signal-processing community. The approach adopted is consistent with acoustic emission methods, in which the principal diagnostic parameter is the temporal evolution of event intensity, including analysis of the slope of the cumulative-event curve. The practical application of the results of this study will help optimize diesel-engine monitoring and maintenance while simultaneously reducing the associated costs. AE-based monitoring can serve as an effective diagnostic and prognostic tool, improving safety, energy efficiency, and environmental performance. In the study, AE sensors were installed at specified locations on the engine, and AE signals were recorded using two different AE systems. The results were analyzed to determine the sources of the AE signals.

    • Experimental Analysis of Diesel Engine Performance Using the Intelligent Common Rail CR/EDC15 Injection System

      pg(s) 86-92

      Modern diesel engines are increasingly equipped with intelligent electronic control systems aimed at improving engine performance, optimizing fuel consumption, and reducing exhaust gas emissions. This paper analyses the “Common Rail Diesel Injection System – CR/EDC15” controlled by the Bosch EDC15 electronic control unit. The research was conducted using the AutoEDU laboratory platform installed in the Automotive Mechatronics Laboratory at the Faculty of Mechanical Engineering. The platform enables real-time monitoring of engine operating parameters, OBDII diagnostics, and analysis of intelligent sensors and actuators used in modern diesel engines. The study investigates the influence of the electronic control system on fuel injection optimization, acceleration response improvement, combustion efficiency, and emission reduction. The obtained results show that the CR/EDC15 system provides higher engine performance, improved operational stability, lower fuel consumption, and reduced environmental pollution compared to conventional mechanical injection systems.

    • Impact of Ammonia Fuel on Waste Heat Availability in Marine Engines

      pg(s) 93-97

      The transition to low-carbon fuels introduces new challenges for the design of energy systems based on internal combustion engines. This paper addresses the effects of ammonia as one of the prime fuels for highly efficient two-stroke engines, e.g., based on MAN high-pressure injection technology. Even if these prime movers can maintain a high effective efficiency over a wide load range, the thermodynamic features of the ammonia combustion have a strong impact on the waste heat pattern. The analysis indicates that the lower adiabatic flame temperature and the chemical composition of the exhaust gases reduce the exhaust temperature, while variations in the specific heat capacity of the exhaust mixture reduce the exergy. This phenomenon is directly related to a reduced potential of working fluid generation in waste heat recovery (WHR) systems. The paper concludes that to maintain high overall plant energy efficiency, advanced technologies, such as organic Rankine cycles (ORC), have to be applied to compensate for the loss of the thermal potential, especially at off-design load conditions.