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Journal of Automotive and Mechanical Applied Technology
Published by Universitas Negeri Yogyakarta
ISSN : -     EISSN : 30897793     DOI : https://doi.org/10.21831/jamat.v1i1
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Focus and Scopes The Journal of Automotive and Mechanical Applied Technology (JAMAT) is dedicated to disseminating original research, reviews, and case studies that contribute to the advancement of automotive engineering and mechanical technology. The journal provides a platform for academics, researchers, and practitioners to share innovative ideas, methodologies, and applications in the fields of automotive and mechanical engineering. Scope Areas: Automotive Engineering Advanced vehicle design and development. Powertrain and propulsion technologies (internal combustion engines, hybrid, and electric vehicles). Automotive safety systems and crashworthiness. Autonomous and connected vehicle technologies. Vehicle dynamics, control systems, and diagnostics. Mechanical Engineering Applications Design, analysis, and manufacturing of mechanical systems. Thermodynamics, fluid mechanics, and heat transfer applications. Computational methods and simulations in mechanical engineering. Material science and advanced manufacturing techniques. Robotics and mechatronics. Applied Technologies Integration of Industry 4.0 in automotive and mechanical sectors. Sustainable and green technologies for mechanical and automotive systems. Maintenance and reliability engineering. Applications of AI and machine learning in automotive and mechanical fields. Focus: The journal accepts contributions from a wide range of sectors, including but not limited to: Academic research institutions. Automotive and mechanical industries. Governmental and non-governmental organizations involved in technology development. Articles can focus on theoretical studies, experimental research, applied projects, and reviews of emerging technologies. Submissions are encouraged to explore innovations, problem-solving techniques, and practical implementations that impact the industry and society.
Arjuna Subject : Teknik (semua kategori) - Teknik Otomotif
Articles 7 Documents
 1 
Search results for , issue "Vol. 2 No. 2 (2025): December" : 7 Documents clear
Design and Experimental Evaluation of a Light Cut-off (Baffle) Plate for Aftermarket LED Motorcycle Headlamps Dwi Prasetyo; Elky Fakhriza; Beni Setya Nugraha
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2462

Abstract

This study aims to determine the impact of replacing halogen lights with LED lights on two-wheeled vehicles, focusing on energy efficiency, light brightness levels, and operational temperatures of the lights to support road safety in areas with minimal road lighting, as well as on adjusting the light distribution of the applied LED lights. The method used was an experiment conducted on variables for which data were unavailable, necessitating manipulation of the research object. The experiment was conducted using a Honda Supra 125 FI motorcycle, with measurements of light intensity (lux), power consumption (watts), battery current (V), electric current (A), and operating temperature (°C). The known impact became a reference for regulating LED light distribution. The test shows that applying a barrier plate design to LED lights can provide focused lighting through its light distribution patterns. The application of the baffle plate design to LED lights provided focused lighting through its light distribution patterns. The use of LED lights provided a slightly higher intensity (6.4%) and an energy consumption efficiency 60% higher, with a reduction in operating temperature of 64%. The application results show that the light control plate successfully forms a bright-dark cut-off, with a uniform light distribution and consistent light intensity of 1854 lux. This indicates that the tested LED lamp maintains stable lighting performance without a decrease in brightness.
Optimization of Production Process Activities in an Effort to Increase the Production Capacity of BZ 020 Cover Housing Muhammad Syahrul Akmal; Orlanda Arya Hidayat; Moch Solikin
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2464

Abstract

The objectives of this study are: (1) To optimize the production process activities of Cover Housing BZ 020 production by implementing an 8-step improvement to increase production capacity. (2) To determine the comparison of the production capacity value of Cover Housing BZ 020 before and after the improvement. (3) To determine the activities that can be optimized to increase the production capacity of Cover Housing BZ 020 production. The method used in this research is the 8-step improvement research method approach. The data collection techniques used are (1) Observation and (2) Documentation. Meanwhile, the research instruments used are (1) Logbook, (2) Observation Sheet, and (3) Cellphone. The data analysis used is descriptive, comparing production capacity and operator activities. The results of this study indicate that: (1) Implementation of the 8-step improvement can be done at PT. Gemala Kempa Daya and is in accordance with the applicable standard SOP. (2) The results obtained after the improvement of production capacity are from 360 units/hour to 468 units/hour, or an increase of 30%. As a result of this improvement, the company also recorded a profit of IDR 55,800,000.00 per year. (3) By adding an extension conveyor, it can shorten the duration of two of the four operator work activities. The decrease in cycle time from 10 seconds to 8 seconds is due to optimizing work activities.
Design of an Electronic Control System for Automating the GMAW Welding Process Taufik Fajar; Rafge Cahya Pramana; I Wayan Adiyasa
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2465

Abstract

This study aims to design and implement an electronic control system to automate the GMAW welding process, focusing on precise regulation of travel speed and travel length to improve repeatability, safety, and weld consistency. The methodology is organized into four stages: (1) needs analysis to define functional requirements, user constraints, and operating ranges; (2) system design covering hardware architecture, sensor and actuator selection, and embedded control logic; (3) implementation through microcontroller-based integration of a motion drive, user interface, and parameter-setting features; and (4) testing to verify accuracy, stability, and performance under realistic operating conditions. The results demonstrate that the system regulates welding speed with an accuracy of 92.54%–99.44%, while maintaining a maximum time standard deviation of 0.038 seconds, indicating stable motion over repeated trials. For welding length control, the system achieves an average absolute error of 0.35–0.5 mm, a percentage error of 0.17%–0.7%, and a standard deviation of 0.051 mm or less, supporting consistent endpoint positioning. In real-world welding tests, the actual weld length deviation ranges from 0.20 to 1.71 mm. It remains within ISO 13920 Class D tolerance limits, confirming practical applicability for general fabrication. The developed controller enables precise parameter control over a speed range of 100–800 mm/min and a length range of 50–300 mm, reducing the need for direct operator intervention and limiting human-induced variability. Overall, the system supports safer, more consistent welding operations and provides a scalable platform for integrating additional monitoring or adaptive control functions. Suitable for training, prototyping, and routine production trials. Future work will address adaptive control diagnostics.
Design and Development of a Low-Power Motorcycle Camshaft Copying Machine: Feasibility and Accuracy Evaluation Raynaldi Prima Kurnia Putra; Muhammad Iqbal Prihanto; Sudarwanto
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2466

Abstract

This research aims to design, develop, and evaluate the feasibility and accuracy of a motorcycle camshaft copy machine as an alternative to protect the privacy of modified camshafts from copying or duplication. This research used the ADDIE development model, involving: (1) problem analysis and needs analysis, which then produced a motorcycle camshaft copy machine; (2) the design phase, resulting in a Safety Factor of 1.23 with a load of 22.046 lb force or 10 kg; (3) the development phase, including the process of cutting the frame steel, welding to make the frame, drilling to make holes in the frame steel, assembling the motorcycle camshaft copy machine components, and painting; (4) the implementation phase, consisting of a feasibility test with a result of "very feasible," suggesting that the motorcycle camshaft copy machine can be used in workshops; and (5) the evaluation phase, which resulted in good accuracy of the camshaft copy machine. The results of this study indicate that: (1) the motorcycle camshaft copy machine has dimensions of 60 cm in length, 50 cm in width, and 75 cm in height, weighs 26.5 kg, and has a power of 245 watts. (2) The motorcycle camshaft copy machine is declared "very feasible", with a value of 89.23%. (3) The motorcycle camshaft copy machine has good accuracy with an accuracy of ± 0.13 mm.
Development and Performance Evaluation of a Car Brake Bleeding Tool to Reduce Labor and Service Time at PT. UMC Suzuki Ahmad Yani Surabaya Raihan Ramadhani; M. Khaniful Annas; Yoga Guntur Sampurno
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2467

Abstract

The objectives of this research are: (1) Designing a brake bleeding tool that will be used for the process of bleeding car brakes at the UMC Suzuki Ahmad Yani Surabaya workshop, (2) Knowing the effectiveness of the brake bleeding tool when used at the UMC Suzuki Ahmad Yani Surabaya workshop, (3) Finding out work efficiency after work is carried out using the brake bleeding tool at the UMC Suzuki Ahmad Yani Surabaya workshop. The design of the car brake bleeding tool was developed through analysis, design, development, implementation, and evaluation, resulting in a specialized tool that enhances the mechanic's work at the PT UMC Suzuki Ahmad Yani Surabaya workshop. This tool helps mechanics bleed car brakes, which previously required conventional tools and at least 2-3 additional mechanics. With the developed brake bleeding tool, mechanics only need to work with one person. This tool can also reduce the time required for brake bleeding, which is usually 17 minutes, to just 9 minutes. The development of a brake bleeding tool proved very effective in expediting brake bleeding maintenance at the UMC Suzuki Ahmad Yani Surabaya workshop. With this tool, manual bleeding tools are no longer required, making work more effective without additional labor. This tool produces a time efficiency of 55%. This tool makes the brake bleeding process more accurate and reliable, providing consistent quality assurance and, overall, increasing the productivity and effectiveness of workshop operations.
Optimizing the Exhaust System to Improve Air Quality in Vehicle Service Repair Shops Hernanda Iqbal Zainul Muttaqin; RR LAKSISTYA RANIA NUR PRITA MAIRA; Kurniawan Sigit Wahyudi
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2470

Abstract

Air pollution from vehicle emissions, including NO₂, SO₂, O₃, TSP, and CO, negatively impacts workers' health and reduces work efficiency and productivity. This study aims to (1) develop an exhaust system at the Nissan Mlati ATPM workshop, and (2) determine the effectiveness of the exhaust system. The process of optimizing the exhaust system to improve air quality in the vehicle service repair stall was carried out through a comprehensive design and development project, including design and development phases and tool use. Then, metric volume (theoretical), actual use, and performance efficiency calculations were used. The results of the study show that optimizing the exhaust system at the Nissan Mlati ATPM workshop has been proven effective in increasing airflow capacity, maintaining air quality, and improving performance efficiency. This system can reduce the concentrations of pollutants such as Carbon Monoxide (CO) and Total Suspended Particulate (TSP) and increase workshop productivity without requiring structural design changes. The overall percentage results show a 51.03% increase in value after exhaust system optimization. This exhaust system not only improves air quality but also increases work productivity, which is crucial in the automotive industry's competition.
Design and Finite Element Analysis of a Portable Bus Service Ramp to Reduce Dependence on Service Pits Novian Dhamas Ramadhan; Muhammad Alfarizi; Agus Widyianto
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2479

Abstract

This study aims to: (1) design and analyze a portable ramp to improve bus repair efficiency at PT. United Tractors Semarang Branch, (2) with a focus on facilitating repairs and reducing dependence on service pits. (3) This portable ramp is expected to overcome access constraints to the underside of buses, speed up repair time, and improve work safety for mechanics. This study uses the DMADV (Define, Measure, Analyze, Design, Verify) method to develop portable ramps. These stages include problem discovery, technical data collection, analysis of materials, 3D model design using SolidWorks, and verification using Finite Element Analysis (FEA) to ensure structural strength and compliance with safety standards. This study successfully designed and analyzed a portable ramp for bus repairs, capable of withstanding an operational load of 88,750 Newtons with a safety factor≥ 3.0, a maximum deformation of ≤ 5 mm, and a safe von Mises stress distribution. The selection of ASTM A36 Carbon Steel resulted in optimal strength and weight, as well as cost efficiency. The ramp design also meets workshop operational needs and improves repair process efficiency. This research successfully designed an optimal portable ramp for the PT. United Tractors Semarang Branch Workshop, considering operational efficiency and safety, ASTM A36 Carbon Steel was selected as the best material based on strength, weight, and cost. It is recommended to implement this portable ramp, along with technician training, maintenance system development, and expansion to other branches, to improve bus repair efficiency.

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