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EFEK PENGGUNAAN DOUBLE DAN SINGLE PISTON CALIPER TERHADAP WAKTU DAN JARAK TEMPUH PADA PENGEREMAN SEPEDA MOTOR 125 CC Sopiyan; Darwin Rio Budi Syaka; Muhammad Rafif Iqbal
Jurnal Konversi Energi dan Manufaktur Vol. 8 No. 1 (2023)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.8.1.3

This study aims to determine the distance and braking time on 125cc motorcycle vehicles by using two types of callipers, namely single-piston and double-piston callipers. The research method uses experimental methods. There this method will compare 2 variables to get the results of the study by sulking on SNI Braking. By varying the two callipers of different types and using the brake pressure gauge, stopwatch, and meter to find out the pressure, time, and distance when conducting the test, the results of the test are calculated by the formula of regularly changing straight motion force (GLBB) slowed down, braking force and braking efficiency formula in order to get more valid results. Based on the results of this research report, it was concluded that the 2-piston callipers are superior to the 1-piston callipers in terms of average mileage of 0.51 m (9.81 m – 9.30 m) in front wheel braking and average mileage of 0.42 m (4.63 m – 4.21 m) in rear wheel braking and average stopping time of 0.21 s (2.51 s – 2.30 s) with the average effect of braking efficiency value of 5% (57% - 52 %) on front wheel braking and the average time for 0.21 s (1.58 s – 1.37 s) with the average effect of efficiency value of 5 % (47 % - 42 %) on rear wheel braking. So that makes 2-piston callipers better used in 125 cc vehicles than 1-piston callipers in terms of braking aspects.

PENGARUH VARIASI BOBOT ROLLER WEIGHT CVT TERHADAP AKSELERASI SEPEDA MOTOR HONDA VARIO 150 Riyadi; Darwin Rio Budi Syaka; Arya Firmansyah
Jurnal Konversi Energi dan Manufaktur Vol. 8 No. 1 (2023)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.8.1.4

Based on the experience of automatic motorcycle users Honda Vario 150, the motorcycle has several weaknesses, but one of the weaknesses that often occurs is the slow acceleration of the motorcycle from low to medium speed. CVT transmission system (Continuously Variable Transmission) affects the slow acceleration of a motorcycle from low to medium speed. The purpose of this study is to analyze the results of testing the use of roller weights with standard weights (18 g), 16 mix standard, and 16 g to get the value of the best acceleration on a dead motorcycle c Honda Vario 150. The research method used is an experimental research method using two research methods, namely testing with a dynamometer and testing with acceleration measurements with logger pro software. The use of a standard roller weight (18 g) is the roller weight with the fastest acceleration on a Honda Vario 150 motorcycle. This is evidenced by an average acceleration of 2.98 m/s2 . While the roller weight of 16 mix standard and 16 g experienced a decrease in acceleration. For roller weight 16 mix standard, there was a decrease in acceleration of 15.44% with an average acceleration of 2.52 m/s2 . And on the 16 g roller weight, there is a decrease in acceleration of 28.86 % with an average acceleration of 2.12 m/s2.

PELATIHAN DIAGNOSA DAN PERBAIKAN RINGAN AIR CONDITIONER (AC)UNTUK MENINGKATKAN KEMANDIRIAN MASYARAKAT DESA Darwin Rio Budi Syaka; Nugroho Gama Yoga
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 3 (2022): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract The topography of the Leading Assisted Area of the Faculty of Engineering, UNJ, is in Pantai Mekar Village, Muara Gembong District, Bekasi Regency, West Java, which is located at the mouth of a river, causing the area to have hot and humid weather. This condition encourages local people to use air conditioning devices or better known as air conditioners (AC). AC users often neglect regular maintenancewhich in turn causes a decrease in performance in this AC system. In general, this decrease in performancecan be corrected by the AC user himself if he knows the cause (diagnosis). Therefore, it is important to equip people who usually operate this air conditioner, through training to increase the independence of thevillage community so that they can diagnose and carry out minor repairs of their own air conditioning system. The training was carried out by providing material in the form of an understanding of air conditioning, basic theory of air conditioning and how to diagnose and repair home air conditioners. Aftercompleting the provision of material, then the next practice of diagnostics and light repair of home air conditioners. The results of the training which were measured qualitatively showed that the trainees gainedadditional knowledge about AC theory and also AC fault diagnosis which can be used as additional knowledge in increasing the independence of the village community. Abstrak Topografi Wilayah Binaan Unggulan Fakultas Teknik UNJ yaitu di Desa Pantai Mekar Kecamatan Muara Gembong, Kabupaten Bekasi, Jawa Barat yang berada di muara sungai menyebabkan daerah itu memiliki cuaca yang panas dan lembab. Kondisi ini mendorong masyarakat setempat menggunakan alat pengkondisian udara atau yang lebih dikenal dengan AC (air conditioner). Pengguna AC kerap mangabaikan perawatan secara berkala yang pada akhirnya menyebabkan terjadi penurunan kinerja pada sistim AC ini. Pada umumnya penurunan kinerja ini dapat diperbaiki oleh pengguna AC itu sendiri apabilamengetahui penyebabnya (diagnosis). Oleh karena itu penting untuk membekali masyarakat yang biasa mengoperasikan AC ini, melalui pelatihan untuk meningkatkan kemandirian masyarakat desa agar dapat mendiagnosa dan melakukan perbaikan ringan sistem AC-nya sendiri. Pelatihan dilakukan dengan pemberian materi berupa pengertian tentang AC, teori dasar AC dan cara diagnosa dan perbaikan ringan AC rumah. Setelah selesai pemberian materi maka dilanjutkan praktik diagnosa dan perbaikan ringan ACrumah. Hasil pelatihan yang diukur secara kualitatif menunjukkan bahwa peserta pelatihan mendapatkanpengetahuan tambahan tentang teori AC dan juga diagnosa kerusakan AC yang dapat dijadikan tambahanpengetahuan dalam meningkatkan kemandirian masyarakat desa.

Analisis rugi kalor selama proses pemanasan pada semi-spherical plenum stainless steel 316 berdasarkan perubahan setting suhu pemanasan Zavi Indasyach Moreno; Ronald Akbar; Almira Citra Amelia; Hilman Adrian; Jeff Michael Johanes; Putut Hery Setiawan; Hyundianto Arif Gunawan; Ragil Sukarno; Darwin Rio Budi Syaka; Mulya Juarsa
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.498

Reactor core melting in a semi-spherical geometry has released heat during severe accidents in nuclear reactors, where the heat-dissipating characteristics need to be studied. So, the study aims to determine the temperature distribution phenomenon and the heat loss rate in stainless steel 316 semi-spherical. This study used a semi-spherical plenum to simulate nuclear reactor debris by experimental methods. Experiments were carried out using four temperature variations from 50oC, 100oC, 150oC, and 200oC. The measuring instrument used is a K-type thermocouple that has been installed at 14 predetermined points. Data taken are the process of increasing and decreasing the temperature in the semi-spherical plenum and the value of the heat loss rate. Based on the experimental results, it was found that the characteristics of the increase and decrease in temperature during the heating and cooling processes at each thermocouple point tended to be the same. Heat loss values that were obtained at temperatures of 50oC, 100oC, 150oC, and 200oC were 354.235 watts, 670.714 watts, 1442.303 watts, and 2064.727 watts. The value of the heat loss will increase in proportion to the size of the setting temperature. The heat loss rate value for all experiments exceeds 50%.

The Influence of Fuel Pump Pressure Variations on the Performance of 2-Stroke Gasoline Direct Injection Engines Darwin Rio Budi Syaka; I Wayan Sugita; Nugroho Gama Yoga; Muhammad Riangga Widanarko
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5354

The direction of technological development in 2-stroke gasoline direct injection engines is to improve engine performance and reduce exhaust gas pollution, where the solution to achieve this is to use a high-pressure electric fuel pump that produces stable fuel pressure and is practical in its application. This research aims to determine the influence of variations in fuel pressure on the performance, especially torque and power, of a 2-stroke gasoline direct injection engine. Tests were carried out on a 110 cc 2-stroke gasoline direct injection motorcycle engine using Research Octane Number (RON) 90 fuel at varying fuel pressures of 7.5 Bar, 8 Bar, and 8.5 Bar on a chassis dynamometer to obtain engine performance data in the form of torque and power. The results of this research show that increasing fuel pressure will increase the atomization of fuel particles so that it will influence increasing the performance of this engine, where maximum torque and power of 6.20 Nm and 2.00 kW are achieved at 3250 rpm, at a pressure of 8.5 Bar.

Performance Analysis of H2O-LiBr Absorption Refrigeration Systems for Future Cars Darwin Rio Budi Syaka; Ragil Sukarno; Jeff Michael Johanes; Gaguk Margono
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8142

There has been an increase in the development of electric cars in recent decades, driven by the global need to reduce greenhouse gas emissions and air pollution. The use of refrigeration systems in electric cars is one of the largest consumptions of electric power. Therefore, this study used an absorption refrigeration system with a working fluid in the form of a combination of water as a refrigerant and lithium bromide salt as an absorption compound (H2O-LiBr) as an alternative refrigeration system.However, the use of water as a refrigerant leads to the required components being larger. This study focuses on analyzing the work performance of absorption refrigeration systems. The results of the analysis of the performance of the absorption refrigeration system state that to get the optimal performance value in operating the designed H2O-LiBr absorption refrigeration system, the generator outlet temperature is required to be a minimum of 75°C, which produces a performance stated in COP of 0.705. In the meantime, the analysis of the generator outlet temperature's impact on the refrigeration system's performance value revealed that the higher the generator outlet temperature, the higher the performance value.

Optimizing Performance of a 4 kW BLDC Motor in Go-Kart Through Load and Speed Testing Hesti Hermawati; Darwin Rio Budi Syaka; Rani Anggrainy
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.9073

The development of electric go-karts involves overcoming challenges related to efficiency across different driving conditions. A key issue is the reduction in efficiency caused by changes in speed and the driver’s weight, both of which impact the motor’s power demands. This study focuses on examining how variations in driver weight (55 kg, 65 kg, and 75 kg) and speed (40 km/h, 50 km/h, and 60 km/h) affect the efficiency of a 4 kW BLDC motor in an electric go-kart. The research employed a quantitative experimental approach, conducting field tests on a 300-meter flat track. Key data, including voltage, current, and torque, were measured to calculate the motor’s input and output power, with efficiency determined by the power ratio formula. Analysis using a Two-Way ANOVA test revealed that both driver weight and speed, as well as their interaction, had a significant effect on efficiency (p<0.001). The highest efficiency recorded was 95.45% at 55 kg and 40 km/h, while the lowest was 62.49% at 75 kg and 60 km/h. These findings align with previous research, confirming that increased load and speed decrease efficiency. Such insights can guide strategies to optimize electric vehicle performance.

The Influence of Fuel Pump Pressure Variations on the Performance of 2-Stroke Gasoline Direct Injection Engines Darwin Rio Budi Syaka; I Wayan Sugita; Nugroho Gama Yoga; Muhammad Riangga Widanarko
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5354

The direction of technological development in 2-stroke gasoline direct injection engines is to improve engine performance and reduce exhaust gas pollution, where the solution to achieve this is to use a high-pressure electric fuel pump that produces stable fuel pressure and is practical in its application. This research aims to determine the influence of variations in fuel pressure on the performance, especially torque and power, of a 2-stroke gasoline direct injection engine. Tests were carried out on a 110 cc 2-stroke gasoline direct injection motorcycle engine using Research Octane Number (RON) 90 fuel at varying fuel pressures of 7.5 Bar, 8 Bar, and 8.5 Bar on a chassis dynamometer to obtain engine performance data in the form of torque and power. The results of this research show that increasing fuel pressure will increase the atomization of fuel particles so that it will influence increasing the performance of this engine, where maximum torque and power of 6.20 Nm and 2.00 kW are achieved at 3250 rpm, at a pressure of 8.5 Bar.

Innovative Pickup Car Cooling System Based on Thermoelectric Coupled With Heat Pipe Sink: Innovative pickup car cooling system based on thermoelectric coupled with heat pipe sink Ragil Sukarno; Muhammad Rafael; Nugroho Gama Yoga; Darwin Rio Budi Syaka; Agus Agung Permana; Yohanes Gunawan; Desy Kurniawati
Automotive Experiences Vol. 8 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13494

Pickup cars are one of the most important means of transportation in the distribution of goods and logistics. However, many customers choose pickup cars without air conditioning because they are less expensive and more energy-efficient, resulting in lower operating costs. Car air conditioning systems generally utilize vapor compression systems, which consume a significant amount of energy. Additionally, some studies on thermoelectric cooling face challenges due to incompatible and difficult-to-install designs within vehicle cabins. To address this issue, this research was conducted on developing an innovative compact air conditioning (AC) system for the cabin of a pickup car. This system utilizes thermoelectric cooling (TEC) combined with a heat pipe sink. This cooling system features a practical and installation-friendly design compared to previous work, which can be integrated into existing pickup models without significant modifications. It is designed as a cooling box that generates and circulates cold air within the cabin. In this testing, the cooling box comprises six-unit thermoelectric cooling, where each unit varies using one-stage TEC modules and two-stage TEC modules. A 175-watt and 200-watt heat was applied and varied in the cabin to simulate the cooling load, and the air outlet duct's velocity also varied at 2 m/s and 3 m/s. The results showed that the thermoelectric cooling systems can significantly reduce cabin temperature increases, lowering the rise by 11.0 Â°C for a single-stage TEC system and by 10.8 Â°C for a double-stage TEC system compared to the cabin without a cooling system. The highest COP value of 1.4 was obtained in the single-stage TEC cooling system at a velocity of 3 m/s. The results show the potential of an innovative thermoelectric cooling (TEC) system when combined with heat pipes, offering an alternative cooling solution for the cabin of a pickup car. This proposed cooling system can be adapted for vehicles that require compact and energy-efficient cooling solutions.

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