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I Made Mara
Mataram University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences

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PENYULUHAN TEKNIK BERKENDARA ECO RIDING SEPEDA MOTOR MATIC PADA REMAJA DI LINGKUNGAN GRIYA PAGUTAN INDAH MATARAM Mara, I Made; Padang, Yesung Allo; Sinarep, Sinarep; Wirawan, Made; Suteja, Suteja; Puad, Rae Nanda Azmi
Jurnal Abdi Insani Vol 12 No 4 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i4.2405

Abstract

Teknik mengendarai sepeda motor memiliki dampak langsung pada tingkat konsumsi bahan bakar. Berbagai aspek dalam cara mengemudi sepeda motor dapat mempengaruhi sejauh mana kendaraan dapat memanfaatkan bahan bakar dengan efisien. Akselerasi yang lembut dan bertahap membantu menghindari beban berlebih pada mesin dapat mempengaruhi konsumsi bahan bakar kendaraan. Mesin sepeda motor memiliki titik efisiensi tertinggi pada kecepatan tertentu. Berkendara pada kecepatan yang konsisten dan optimal dapat membantu mesin bekerja pada titik efisiensi yang terbaik sehingga mengurangi konsumsi bahan bakar. Selain itu, mesin yang terawat dengan baik akan memiliki efisiensi yang lebih baik. Dengan memahami dan menerapkan teknik berkendara yang hemat bahan bakar, pemilik sepeda motor dapat membantu mengoptimalkan efisiensi mesin dan mengurangi dampak lingkungan serta biaya operasional kendaraan. Secara umum, sepeda motor yang menggunakan sistem penggerak CVT cenderung memberikan konsumsi bahan bakar yang lebih efisien, terutama dalam kondisi berkendara yang berhenti dan maju secara teratur atau saat berada di dalam lalu lintas dalam kota. Memberikan pelatihan kepada pengendara mengenai teknik berkendara yang efisien atau hemat bahan bakar, seperti menghindari akselerasi yang tidak perlu dan tidak melakukan pengereman yang tiba-tiba, dapat membantu mengurangi tekanan pada sistem transmisi dan meningkatkan efisiensi bahan bakar. Dengan menerapkan teknik-teknik perawatan yang baik, pengendara dapat memastikan bahwa sepeda motor berpenggerak CVT beroperasi pada performa terbaiknya, yang pada akhirnya dapat membantu menghemat konsumsi bahan bakar. Perawatan yang teratur dan praktek terbaik tidak hanya meningkatkan keandalan sepeda motor, tetapi juga memiliki dampak positif terhadap lingkungan dan kantong pengendara melalui pengurangan biaya operasional.
Analisis Eksperimental Pengaruh Jenis Oli Terhadap Suhu dan Konsumsi Bahan Bakar Pada Sepeda Motor 4-Tak 125 cc Rahmadi, Fakhmi Caesar; Mara, I Made; Sutanto, Rudy
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.237

Abstract

This study analyzes the effect of oil type on exhaust gas temperature and fuel consumption in a 125cc 4-stroke motorcycle. Three kinds of SAE 10W-40 oil were used: mineral, semi-synthetic, and full synthetic. Tests were conducted at idle with varying rpm and while cruising at varying speeds. Temperature was measured using a thermo gun, while fuel consumption was measured using a burette. Results showed that full synthetic oil produced the most stable temperature and lowest fuel consumption, while mineral oil demonstrated the highest temperature and consumption, especially at high rpm. This efficiency is attributed to the chemical characteristics and thermal stability of the full synthetic oil. This study provides a novel contribution by testing a classic air-cooled motorcycle under static and dynamic conditions, thus better reflecting real-world use.
Analisis Eksperimental Pengaruh Variasi Ketinggian Dome Piston terhadap Performa Mesin 4-Tak Mahendra, Esa Ramdhan Ardi; Mara, I Made; Sutanto, Rudy
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.239

Abstract

Internal combustion engines remain the primary power source in transportation by converting fossil fuel energy into mechanical energy. This study examines the effect of piston dome height variations (1 mm, 3 mm, and 5 mm) on the performance of a 4-stroke 87.70 cc engine. A quantitative method was used with a rope brake dynamometer to measure torque, adequate power, fuel consumption, and SFCe, effective at engine speeds ranging from 2000 to 5000 rpm. The highest torque and power were recorded at 4000 rpm, the highest fuel consumption at 5000 rpm, and the highest SFCe at 2000 rpm for all dome height variations. As piston dome height increases, combustion chamber volume decreases, leading to lower compression ratios and reduced combustion efficiency. Therefore, piston design should be aligned with the intended focus on either efficiency or performance.
SOSIALISASI DAN PELATIHAN PEMBUATAN PAKAN BERNUTRISI DENGAN METODE FERMENTASI RUMPUT GAJAH SEBAGAI UPAYA PENINGKATAN KUALITAS HEWAN TERNAK DI DESA BOROK TOYANG Mara, I Made; Sasono, Marendra; Pramana, Yoga Tri; Fitri, Imayatul; Handayani, Fitri; Pratama, Imam Akbar; Firdaus, Muhammad; Islami, Nurul Hida Wahyuni; Paramitha, Ni Ketut Rizka Widya; Saputri, Lia; Musyahadati, Shufi
Jurnal Wicara Vol 3 No 2 (2025): Jurnal Wicara Desa
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/wicara.v3i2.6735

Abstract

Borok Toyang Village, located in the West Sakra District, East Lombok Regency, has a very high potential for livestock farming, especially cattle and goats. However, farmers still face difficulties in providing high-quality feed for their livestock to ensure optimal growth and productivity. The traditional feed used reduces livestock growth and increases production costs. To address this issue, the socialization of elephant grass fermentation, a better livestock feed innovation, was carried out. This activity involves initial observation, socialization, and direct training for farmers in Borok Toyang Village. Observation was conducted to determine the condition of the farms and the feeding patterns. The training included the direct preparation of fermented feed, and socialization was provided through seminars and open discussions about the benefits of fermentation. The results of the activities show that farmers have a better understanding of the importance of innovation in providing livestock feed. It has been proven that the fermentation of elephant grass accelerates livestock growth, improves the nutritional quality of feed, and reduces dependence on expensive commercial feed. Additionally, this method helps ensure the availability of quality feed, especially during the dry season. Some farmers have expressed interest in adopting this method independently and plan to form small groups to share experiences in its implementation. Farmers in Borok Toyang Village hope to independently produce more livestock, reduce production costs, and enhance the village's economic resilience through livestock farming with this socialization and training.
Pengaruh Posisi Penyemprotan Bahan Bakar Gas Lpg Pada Intake ManifoldTerhadap Konsumsi Bahan Bakar Pada Mesin Bensin Empat Langkah Satu Silinder (Honda Supra X) Nuarsa, I Made; Mara, I Made; Riskon, Riskon
Dinamika Teknik Mesin Vol 2, No 1 (2012): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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

Abstract

One of major sources of air pollution is the result of combustion exhaust gases of automotive engines. As it is known that the process of fuel combustion from motor fuel produces exhaust gases which theoretically contain elements of CO, NOx, HC, CO2, H2O and N2, where many of which are polluting the surrounding environment in the form of air pollution. The use of LPG fuel for gasoline engine can be done by adding a piece of equipment called a conversion kit. In this study the fuel in the LPG gas injected in the intake manifold with some variation of spin injection with 3000 rpm, 4500 rpm and 6000 rpm for each transmision rate (Neutral s / d Gear 4). The result showed that the injection of fuel gas LPG in the rear position (P3) in getting a decrease in fuel Consumtion (FC) is optimal compared to other injection position (P1, P2). In addition the maximum fuel. Consumtion obtained at transmission rate at each round of variation mesin. Lowes CO emission levels found in LPG fuel injection in the rear position (P3) on the engine rev 3000 rpm kadar CO2 in round 3000 engine rpm optimum obtained from the use of LPG gas fuel injection in the rear position (P3) fornearly all transmision levels. Lowest HC emission values obtained on the location of the feul gas injection LPG rear position (P3) at 3000 rpm rotation at the 4th gear.
Sosialisasi Pentingnya Alat Pemadam Api Ringan sebagai Antisipasi Bahaya Kebakaran di Laboratorium Motor Listrik Jurusan Teknik Mesin Universitas Mataram Putra, I Ketut Perdana; Wiryajati, I Ketut; Mara, I Made; Adi W, IGAK Catur; Adnyani, Ida Ayu Sri; Okariawan, IDK
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 4 (2025): Oktober-Desember 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i4.13032

Abstract

Laboratories are environments with a high risk of fire, especially in engineering laboratories, which frequently use electrical equipment, batteries, and flammable materials. Fire prevention and mitigation efforts are crucial for ensuring the safety of laboratory users. One of the mandatory facilities is a portable fire extinguisher (APAR), yet many students still do not understand how to use it and its function. This community service activity involved raising awareness about the importance of APAR in the Faculty of Engineering's Electric Vehicle Laboratory, with 15 students participating. The results of the activity showed an increase in students' understanding of the function, types, and procedures for using fire extinguishers. Prior to the socialization, only 26.7% of students understood the function of fire extinguishers, but after the socialization, this increased to 100%. Understanding of fire extinguisher procedures increased to 86.7%. This activity demonstrated that socialization and hands-on practice can improve students' awareness and skills in fire prevention
PENGARUH pH DAN PUTARAN PENGADUKAN PADA FERMENTASI MOLASE TERHADAP HASIL AKHIR PRODUKSI BIOETANOL Egamiati; Tri Rachmanto; I Made Mara
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

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Abstract

Until now, oil and gas are the main energy sources in the world. Indonesia is a country with high energy utilization. Energy sources in Indonesia still come from fossil fuels. Burning fossil fuels, such as oil and gas, can cause the greenhouse effect. Therefore we need an alternative energy (biofuel) that is not harmful to the ecosystem. One example of biofuel is bioethanol. This study used 2 variations, namely stirring rotation (800, 1000 and 1200 rpm) and fermentation pH (4, 4.5 and 5). So from the two variations, 9 kinds of treatment were obtained with 3 repetitions so that the total sample was 27. The purpose of this study was to determine the effect of stirring rotation (rpm) and pH of fermentation on the final yield of bioethanol production. The production of bioethanol is carried out by a fermentation process for 48 hours, then distilled to obtain bioethanol. The results of this study indicate that the variation of fermentation pH is the most dominant factor on the level of bioethanol produced, while for the volume of bioethanol produced the most dominant factor is the stirring rotation. The treatment that produced the highest volume of bioethanol was a stirring rotation of 1000 rpm and a fermentation pH of 4 with an average volume of 1234.3 mL and the highest alcohol content was obtained at a stirring rotation of 1000 Rpm and a fermentation pH of 5 with an average value of 81.3%.
PERANCANGAN CHASIS KENDARAAN LISTRIK UNIVERSITAS MATARAM A.A. Alit Triadi; Tri Rachmanto; I Made Mara; I G. N. K. Yudhyadi; Nur Kaliwantoro
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

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Abstract

Chassis is the main component of the vehicle that functions to support the engine, body, suspension system, electrical system and driver. Chassis is one part of the vehicle that has an important role so careful planning is needed in its manufacture. Chassis must be strong and sturdy to support the load of the driver, electric motor and accessories. In addition, the chassis must also be light so as not to overload the work of the electric motor and be able to go through various road conditions. The vehicle body is its function to shape the vehicle and also protect the people inside. In this design, steel and aluminum materials are used, then simulated using the Autodesk Inventor software. The goal is to determine the Von Mosses stress value on the chassis design. AISI 1018 steel material with a load of 700 kg, 800 kg, and with a load of 900 kg obtained a value of 5.56. The safety factor obtained is still safe because it is above the safety factor for industrial construction design, namely 4. Aluminum 6061 material with a load of 700 kg, 800 kg and with a load of 900 kg obtained a value of 7.46. The safety factor obtained is still safe because it is above the safety factor for industrial construction design, namely 4.
ANALISIS SUDUT BELOK DAN KECEPATAN TERHADAP RADIUS BELOK MOBIL LISTRIK I Made Mara; A. A. Alit Triadi; Andrian Suci Rahmawan
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

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Abstract

As the number of cars increases, the number of accidents that occur is directly proportional to the number of accidents that occur, namely 117,949 cases and this increases by around 8.3% annually, mostly due to driver negligence and lack of vehicle stability. One important aspect in car design is the steering system which influences the response of the vehicle's steering motion to steering wheel input and has a major influence on comfort as well as safety. The purpose of this study was to determine the turning radius at various speeds and turning angles and to determine the ratio of the turning angle to the turning angle of an electric car. In the analysis phase, calculations are carried out based on slip analysis to obtain the turning radius at various speeds and turning angles, and the ratio of the turning angle to the turning angle of the electric car. At the testing stage it is carried out by determining the steer rotation angle based on the specified turning angle. The results of this study are at a speed of 30 Km/hour with a turning angle of 240 resulting in the smallest turning radius, that is, in the analysis of 5.5 m and 5.75 m of experiment and the smallest percentage of turning radius, namely the results of the analysis are 4% smaller than the experimental results. At a speed of 50 Km/hour with a turning angle of 150 produces the largest turning radius, namely, in the analysis of 9.5 m and 9 m experiments and the greatest percentage of turning radius, namely the results of the analysis are 13% smaller than the experimental results. From the results of the analysis, the ratio of the turning angle to the turning radius is 18:1.
STUDY PENGEREMEN PADA MOBIL LISTRIK HASIL MODIFIKASI A.A. Alit Triadi; Achmad Zainuri; I Made Suartika; I Made Adi Sayoga; I Made Mara; I Dewa Ketut Okariawan
Energy, Materials and Product Design Vol. 3 No. 1 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

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Abstract

Every three accidents occur every hour in Indonesia, according to the Director of Road Traffic at the Ministry of Land Transportation, with a percentage of over 50-70 percent and 30 percent of accidents occur due to poor performance of the brake system. Accidents occur due to insufficient braking distance and lack of understanding of the braking characteristics of the vehicle being driven. The aim of this research is to analyze the distance, time and braking force required for an electric car to move until it stops with variations in speed and vehicle load. This research was carried out using an experimental method where a prototype electric car was run by varying the speed and load of the vehicle to obtain braking time and distance and analyzing the data obtained. The shortest braking distance at a speed of 20 km/hour with a vehicle load of 950 kg is 4.39 meters. The longest braking distance is 14.78 meters at a speed of 40 km/hour with a vehicle load of 1050kg. The fastest braking time is at a speed of 20 km/hour with a vehicle load of 950 kg, namely 1.97 seconds. The longest braking time was at a speed of 40 km/h with a vehicle load of 1050 kg, namely 2.76 seconds. The smallest braking force is at a speed of 20 km/hour with a vehicle load of 1050 kg, namely 2098.36 N. The largest braking force is at a speed of 40 km/hour with a vehicle load of 950 kg, namely 4132.65 N.
Co-Authors A. A. Alit Triadi A.A. Alit Triadi A.A. Alit Triadi, A.A. Alit Achmad Zainuri Achmad Zainuri Adi W, IGAK Catur Agus Dwi Catur Ahmad Wardi Salim, Ahmad Wardi Allo Padang, Yesung Andrian Suci Rahmawan Arif Mulyanto, Arif Barlian Mahendra, Barlian Bima, Rangga Didin F Fane, Didin F Egamiati Egamiati Egamiati Firman Aryanto, Firman Fitri Handayani Fitri, Imayatul hendry sakke tira I G. N. K. Yudhyadi I G.A.K Chatur Adhi W.A. I Gede Bawa Susana I Kade Wiratama I Kade Wiratama, I Kade I Ketut Wiryajati I Made Adi Sayoga I Made Adi Sayoga, I Made I Made Adi Sayoga, I Made Adi I Made Nuarsa I Made Nuarsa, I Made I Made Suartika I Made Suartika I Made Suartika I Nyoman Wahyu Satiawan I Wayan Joniarta I Wayan, Joniarta I.D.K. Okariawan Ida Ayu Sri Adnyani Ida Bagus Alit IDK Okariawan, IDK Islami, Nurul Hida Wahyuni L. Edsona Furqan Prina, L. Edsona Furqan Made Wijana Made Wirawan, Made Mahendra, Esa Ramdhan Ardi Muhamad Majedi Muhammad Firdaus Muliadi Harianhady, Muliadi Musyahadati, Shufi Nur Kaliwantoro Okariawan, I Dewa Ketut Paramitha, Ni Ketut Rizka Widya Pramana, Yoga Tri Pratama, Imam Akbar Puad, Rae Nanda Azmi Purnama, Febrian Putra, I Ketut Perdana Rahmadi, Fakhmi Caesar Rahmawan, Andrian Suci Riskon Riskon, Riskon Rudy Sutanto saputri, lia Sasono, Marendra Sinarep Sinarep Sujita Sujita Suteja Suteja, Suteja Syamsul Hadi Towilan Ma’bud, Towilan Tri Rachmanto Tri Rachmanto, Tri Triadi, A. A. Alit Yesung Allo Padang, Yesung Allo Yudhyadi, I G. N. K.