Current Issue : July-September Volume : 2025 Issue Number : 3 Articles : 5 Articles
Objective Analyze the hazards, status, and protective facilities of formaldehyde in the spraying position of a certain automobile manufacturing painting workshop in recent years, and understand the improvement measures after exceeding the standard in the spraying position. Methods Conduct occupational health on-site investigation on the spraying position in the painting workshop of automobile manufacturing enterprises, and detect formaldehyde in the air of their workplace. Results After improvement, the formaldehyde concentration in the spraying position has been decreasing year by year and finally controlled. Conclusion Formaldehyde in the spraying position of the painting workshop is prone to exceeding the standard. After screening raw and auxiliary materials, appropriately increasing the air volume of the exhaust system, and cleaning and maintaining the exhaust system, the harm of formaldehyde in the spraying position can be controlled through source control and measures to improve and clean the exhaust system. At the same time, strengthen occupational health knowledge training and education, enhance workers' personal protection, and carry out pre employment, on-the-job, and post employment occupational health examinations....
This article deals with the technical and official possibilities of changing the official data on vehicle fuel consumption in the Slovak Republic. This case study analyzes various methods of measuring fuel consumption, including the use of a fuel flowmeter, OBD devices and calculation based on emission tests. The tests took place in laboratory conditions using the roller dynamometer on the Kia Ceed mildhybrid vehicle. Based on the Real Drive Emission requirements, five 1.5 h cycles were repeated in urban, suburban and highway conditions. Using multi-criteria analysis, the methods used to measure fuel consumption are evaluated from the point of view of efficiency, accuracy, and economy. This study contains a real view of the performance of these exams in the conditions of the Slovak Republic. The fuel consumption measured by the OBD device compared to the volumetric flowmeters was at a relative difference of −4.94%. The fuel consumption calculated through exhaust gas emissions was +2.83% compared to the volumetric flowmeters....
Electrification and modularity are emerging as key trends in off-road vehicle development, prompting the need for innovative solutions in steering and modular coupling. This study presents an electromechanical connection and steering joint, conceived to replace traditional hydraulic systems and offer enhanced steering precision, modular adaptability, and system efficiency. By eliminating hydraulic components, the design reduces fluid leakage risks, lowers maintenance requirements, and improves energy integration with the vehicle’s electric drivetrain. The joint enables independent module articulation, including steering and controlled tilting, to optimize vehicle stability across diverse terrains. A prototype was built and tested under real-world conditions, assessing functional reliability, ease of integration, and operational performance. The findings demonstrate that electromechanical steering substantially boosts system flexibility compared to conventional hydraulic setups....
The net power of an automobile engine is one of the important indicators for measuring engine performance, which reflects the power output capacity of the engine under actual working conditions. In this paper, a natural gas engine is selected. Based on the test procedure and measurement method, a mathematical model of net power is established. The standard uncertainties of parameters such as measurement repeatability, measured engine torque, measured engine speed, atmospheric pressure, intake humidity, and intake temperature in the model are analyzed. Finally, the evaluation result of measurement uncertainty of net power is obtained....
The automobile sector faces major challenges in reducing greenhouse gas (GHG) emissions, with the shift to electric mobility raising concerns about resource sustainability. Although circular economy (CE) strategies are suggested as complementary solutions, their long-term effectiveness is questioned due to rapid vehicle electrification. This study examines whether evolving energy scenarios affect the effectiveness and priority of CE strategies in Japan’s and China’s automobile sectors. Under moderate vehicle electrification scenario, CE strategies could reduce cumulative resource extraction by 2.4 Gt in Japan and 49 Gt in China, with GHG reductions of 0.28 Gt and 6.1 Gt, respectively, by 2050. Under more aggressive electric vehicle scenarios, resource savings rise to 3.1 Gt (Japan) and 52 Gt (China), although GHG reductions decrease to 0.21–0.25 Gt in Japan and 5.2–5.6 Gt in China, depending on the energy mix. Over 50% of remaining GHG emissions in Japan and China will be tied to vehicle manufacturing, especially lithium-ion battery (LIB) production. Reducing vehicle ownership remains the most impactful strategy, with vehicle downsizing and enhanced material recycling offering notable benefits, especially in China. Policy measures such as shared mobility services, subsidies for durable and fuel-efficient vehicles, and advanced LIB recycling systems are critical to addressing resource demands and environmental impacts. While the GHG mitigation potential of CE strategies may decrease as grids decarbonize, their role in conserving critical resources remains indispensable. These findings highlight the need for holistic, life-cycle approaches that integrate CE strategies with decarbonization policies to achieve net-zero goals. Lessons from Japan’s and China’s experiences provide actionable insights for other regions, emphasizing the enduring relevance of CE strategies in reducing resource consumption and mitigating environmental impacts in a rapidly electrifying automobile industry....
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