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All Journal Infotekmesin JURNAL FLYWHEEL Proceedings Series on Physical & Formal Sciences JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Nugrah Rekto Prabowo
Program Studi Teknik Mesin Sekolah Tinggi Teknik Wiworotomo Purwoketo Jl. Sumingkir No.01 Purwokerto
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Mapping Ignition Timing Engine Control Unit (ECU) Programmable Terhadap Torsi Dan Daya Motor Bensin 4 Langkah Warso; Prabowo, Nugrah Rekto; Sutarno; Mastur
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 2 No 2 (2020): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (583.48 KB) | DOI: 10.52005/permadi.v2i2.37

Abstract

The current technology applied to motorbikes is growing, so that it can improve the performance of fuel injection systems that can be controlled electronically by the Engine Control Unit (ECU) with sensors and actuators. ECU is currently produced by an Indonesian racing company other than a motorcycle manufacturer, the Programmable ECU which can change Ignition Timing (ignition time) with the aim of improving engine performance. That way it is necessary to do research that aims to determine the ignition time in the ECU program for torque and motor power of 4 steps. To simplify the implementation, the results of tables and graphs can be analyzed. The effect of standard ECU ignition time at 5 ° before TDC produces maximum torque of 14.86 Nm at 7500 rpm engine speed and 16.9 maximum power at 8500 rpm engine speed. The engine circulates 7500 rpm mapping ECU 1 torque is increased 3% to 15.25 Nm and power rises 3% to 17.4 HP on the 8750 rpm engine. After mapping again to ECU 2 and a 3% increase in torque and 4% power compared to the use of standard ECU ignition time. The resulting torque ECU maps 2 by 15.29 Nm at 7500 rpm engine speed and produces a maximum power of 17.6 HP on the 8750 rpm engine. At ECU 1, mapping with the highest ignition time at 32 ° before the top dead center is carried out. In mapping ECU 2 uses the ignition point time at 35 ° before the top dead center.
Analisis Penggunaan Knalpot Racing Slip-On Dan Knalpot Racing Full System Terhadap Performa Mesin Pada Motor 150 CC Wibowo, Trio Nur; Prabowo, Nugrah Rekto; Purwanto, Dwi
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.872

Abstract

One way to improve the performance of an engine without dismantling the original engine is to modify the exhaust pipe, which is commonly called the exhaust. Here we use 4 types of exhaust, namely factory standard exhaust, slip-on exhaust (standard header-modified muffler), slip-on (modified header-standard muffler), and full system exhaust that we take from the market. This study aims to test the performance of the motor which consists of torque, power, and exhaust emissions (CO and HC levels) from the four types of exhausts, using a dynamometer to determine torque and power, an emission gas analyzer to determine the level of exhaust emissions (CO and HC). Our experimental results show the data, the results are still below the standards set by the Indonesian government. The greatest torque of 15.02 N.m at 7500 rpm and the greatest power of 18.36 hp is achieved by a full-system modified exhaust compared to the standard exhaust with the highest torque of 14.62 N.m at 7000 rpm and the highest power of 16.67 hp at 9500 rpm. The best exhaust emission levels are achieved by standard exhaust with the largest CO content of 0.62% at 10000 rpm and the largest HC content of 107 ppm at 10000 rpm compared to full system exhaust with the largest CO content of 1.79% at 10000 rpm and 201 ppm HC levels at 10000 rpm, in other words the standard exhaust is still more environmentally friendly than the full system exhaust.
Pengaruh Variasi Tekanan Gravity Shot Peening Pada Proses Pengerasan Permukaan terhadap Sifat Mekanis dan Morfologi Struktur Baja S45C Pratama, Ago Edli; Sakuri, Sakuri; Prabowo, Nugrah Rekto
JURNAL FLYWHEEL Vol 13 No 2 (2022): Jurnal Flywheel
Publisher : Teknik Mesin S1 ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/flywheel.v13i2.5688

Abstract

Penelitian bertujuan mengetahui surface treatment dengan metode gravity shot peening menggunakan variasi tekanan terhadap kekerasan, pengamatan struktur mikro dan foto makro dari baja S45C. Baja S45C merupakan jenis baja yang memiliki kadar karbon (0.3-0.5%C) memungkinkan baja ini untuk ditingkatkan lagi sifat mekaniknya. Parameter penelitian metode gravity shot peening pada material baja S45C dengan variasi tekanan penembakan 5 kg/cm², 6 kg/cm² dan 7 kg/cm². Jarak penembakan 100 mm. Waktu 7 menit, dan menggunakan bola baja tipe S23 dengan diameter 0,6 mm. Diameter nozzle 5 mm. Spesimen diletakkan tegak lurus (900). Metode shot peening dapat meningkatkan kekerasan suatu material. Nilai rata-rata kekerasan terbesar ada pada variasi tekanan 6 kg/cm² yaitu sebesar 202,8 VHN, sedangkan nilai rata-rata kekerasan terkecil pada ada variasi tekanan 5 kg/cm² yaitu sebesar 180,37 VHN. Struktur mikro pada tekanan 7 kg/cm² struktur perlit dan martensit lebih banyak dibandingkan shot peening dengan variasi tekanan yang lainnya, hal ini semakin menguatkan bahwa semakin besar tekanan shot peening maka material akan mengalami peningkatan kekerasan. Hasil foto makro raw material memiliki permukaan yang lebih halus dibandingkan dengan spesimen sesudah dilakukan shot peening. Data menunjukan semakin besar tekanan shot peening maka semakin dalam bekas penembakan bola baja dan semakin tinggi nilai kekasaran dari struktur permukaan baja S45C.
Upgrading Bahan Bakar Jumputan Padat (BBJP) Sebagai Co firing Sistem Tenaga Uap Melalui Thermal Drying dan Fermentasi Mastur, Mastur; Sugiantoro, Bambang; Prabowo, Nugrah Rekto; Supiyana, Nana; Sutisna, Utis
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2074

Abstract

The waste sorting process produces organic and inorganic waste. It can be converted into Solid Recovered Fuel with the addition of a maximum of 20% plastic, which can be used for co-firing coal combustion in steam power systems. High humidity levels and the condition of organic waste with its various constituent components require drying and other treatments to increase the calorie content. Types of organic waste treatment, methods of drying, and decomposition of organic waste went through a fermentation process. The research aims to identify the effect of fermentation, addition of biomass, and plastic shreds of BBJP products on density, ash content, chlorine, and calorific value. Dimensions of organic waste powder at a level of 50 mesh and plastic shreds of 5-10 mesh are aimed at increasing the pellet/SRF bond. Mechanical testing data in the form of compression testing resulted in a level of resistance that exceeded pellet strength requirements and increased by 67%. Chlorine and sulfur levels are approaching the limit, but ash levels are still high. The calorific value of pellets in the fermented organic waste specimen treatment produces a higher calorific value compared to other treatments. Research on converting waste into co-firing fuel in solid form with the criteria for calorific value and physical properties that comply with the technical requirements for co-firing steam-powered systems can still be optimized to produce fuel with a higher calorie content. Reducing chlorine, sulfur, and ash levels is done for a low-carbon and environmentally friendly combustion process.
Co-Authors Bambang Sugiantoro dwi purwanto Mastur Mastur Mastur Pratama, Ago Edli Sakuri, Sakuri Supiyana, Nana Sutarno Utis Sutisna Warso Wibowo, Trio Nur