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All Journal International Journal of Renewable Energy Development Mechatronics, Electrical Power, and Vehicular Technology Jurnal Teknik Mesin Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Teknologi SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Rekayasa Mesin Prosiding Semnastek Indonesian Journal of Science and Technology Jurnal Penjaminan Mutu Journal of Community Services and Engagement Jurnal Elemen Community Empowerment Community Empowerment Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Teknik Mesin Mechanical Engineering for Society and Industry Automotive Experiences Urecol Journal. Part D: Applied Sciences Innovation in Health for Society Jurnal Penjaminan Mutu International Journal of Renewable Energy Development

Muji Setiyo

Universitas Muhammadiyah Magelang, Magelang, Indonesia

Author-ID : 377488

Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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INVESTIGASI PENURUNAN DAYA MOBIL BERBAHAN BAKAR LPG MELALUI PENGUKURAN EFISIENSI VOLUMETRIK Muji Setiyo; Bagiyo Condro Purnomo
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Liquified Petroleum Gas (LPG) merupakan bahan bakar alternatif yang memiliki semua sifat kunciuntuk mesin Spark Ignition. Salah satu model sistem pemasukan LPG ke mesin adalah denganconverter kits model vaporizer-mixer. LPG dimasukkan dalam fasa gas melalui throtle body (TB)dalam kondisi panas. Kondisi ini akan mengurangi massa aliran udara yang masuk ke mesin,karena keduanya (LPG dan udara) dimasukkan pada saluran yang sama pada throtle body, yangdiduga menjadi penyebab penurunan daya. Penelitian ini bertujuan untuk menginvestigasi dugaanpenurunan daya pada mobil berbahan bakar LPG (TOYOTA 4A-FE 1500 cc ) yang disebabkanoleh sistem pemasukan tersebut. Metode yang digunakan adalah dengan pengukuran efisiensivolumetrik pada dua jenis mode bahan bakar (LPG dan bensin). Pada masing-masing modeoperasi, dilakukan variasi bukaan throtle valve dari 8,2%, 9,2%, 10,2%, 11,2%, sampai 12,2% padadiameter airflow meter konstan. Pada konfigurasi tersebut dilakukan pengukuran aliran udara danputaran mesin. Dari olah data, diperoleh bahwa kecenderungan efisiensi volumetrik untuk modeLPG mengalami kenaikan untuk setiap penambahan bukaan throttle, yaitu 36% @8,2%TB dan41% @12,2%TB. Sementara pada mode operasi bensin mengalami penurunan untuk setiappenambahan bukaan throttle, yaitu 37% @8,2%TB dan 31% @12,2%TB. Dari hasil analisislanjut, diperoleh bahwa penurunan daya pada mode operasi LPG dikarenakan pada bukaan throttlebody yang sama, mesin LPG menghasilkan putaran mesin yang lebih rendah yaitu 1690 rpm, @12,2%TB sementara mode operasi bensin menghasilkan 220 rpm @ 12,2%TB.

PENGARUH CAMPURAN ETHANOL PADA LAJU KOROSI TANGKI BAHAN BAKAR Luki Fahmi; Muji Setiyo
Prosiding Semnastek PROSIDING SEMNASTEK 2015
Publisher : Universitas Muhammadiyah Jakarta

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Ethanol telah menjadi kebijakan energi jangka panjang di beberapa negara, termasuk Indonesia. Kebijakan ini untuk mengurangi konsumsi bahan bakar fosil. Ethanol selain sebagai bahan bakar terbarukan, juga memiliki kandungan carbon yang lebih rendah dari bensin. Umumnya, ethanol digunakan dalam bentuk campuran maupun dedikasi penuh. Namun demikian, salah satu kelemahan ethanol adalah mudah teroksidasi, yang dapat mempercepat terjadinya korosi. Tujuan penelitian ini untuk mengkaji efek penggunaan campuran ethanol-bensin terhadap laju korosi pada tangki bahan bakar. Metode yang digunakan adalah model eksperimen sungguhan (true experiment research) dengan media sebuah tangki bahan bakar Honda Supra X. Tangki bahan bakar dipotong potong dan diambil secara acak sebanyak 9 buah. Potongan (sampel) tersebut direndam dalam campuran ethanol E-10, E-20, dan E-30 selama 8 minggu. Pada setiap minggu, sampel dibersihkan dan dicatat beratnya. Laju korosi dihitung dengan membandingkan jumlah pengurangan berat terhadap waktu dalam satuan milli-inch per year (mpy). Hasil pengujian dan analisis menunjukkan bahwa laju korosi tangki bahan bakar pada penggunaan campuran Ethanol 20% (E-20) dan campuran Ethanol 30% (E-30) sebesar 0,085 mpy. Sementara pada campuran Ethanol 10% (E-10) pengurangan berat sampel tidak terdeteksi. Kesimpulannya, penggunaan campuran ethanol akan mempercepat korosi tangki bahan bakar. Sebagai antisipasi, sebelum menggunakan campuran ethanol-bensin diperlukan penilaian terhadap material tangki bahan bakar. Lebih lanjut, disarankan untuk menggunakan tangki bahan bakar yang tahan korosi.

Natural Gas Vehicle (NGV): Status Teknologi dan Peluang Pengembangannya Roni Muhammad Susanto; Muji Setiyo
Automotive Experiences Vol 1 No 01 (2018)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Artikel ini menyajikan sebuah review teknologi kendaraan berbahan bakar Compressed Natural Gas (CNG) atau yang dikenal dengan Natural Gas Vehicle (NGV). Metode review yang digunakan adalah dengan membandingkan teknologi Bosch Compressed Natural Gas Powertrain dengan beberapa laporan penelitian yang relevan dari segi output daya mesin, efek lingkungan, dan manfaat secara ekonomi. Hasil studi ini menunjukkan bahwa output daya kendaraan yang dioperasikan dengan CNG lebih rendah daripada yang dioperasikan dengan bensin atau LPG karena efisiensi volumetrik yang rendah. Namun demikian, dari aspek lingkungan dan aspek ekonomi, kendaraan CNG menjanjikan untuk dikembangkan pada masa sekarang dan masa yang akan datang karena faktor kesediaan di alam. Meskipun ketercapaian BEP kendaraan yang dikonversikan dari bensin ke CNG lebih lama daripada LPG, kendala ini dapat diatasi dengan pemberian insentif oleh pemerintah untuk percepatan program konversi.

Estimasi Pemborosan Bahan Bakar Akibat Kemacetan Menggunakan Analisis Citra Google Map (Studi Kasus pada Simpang Armada Town Square Mall Magelang) Bagas Arif Prasetyo; Dwi Ahmad Rizani; Muji Setiyo; Noto Widodo; Saifudin Saifudin; Bagiyo Condro Purnomo
Automotive Experiences Vol 1 No 02 (2018)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Magelang memiliki tingkat kemacetan yang cukup padat pada beberapa ruas jalan terutama yang menuju pusat kota, salah satunya pada simpang Armada Town Square Mall yang kian hari semakin padat. Oleh karena itu, artikel ini menyajikan analisis pemborosan bahan bakar akibat kemacetan dengan menggunakan citra google map. Dalam penelitian ini metode yang digunakan dengan melihat panjang kemacetan pada google map, kemudian menghitung jumlah dan jenis kendaraan yang terjebak dalam kemacetan. Hasil penelitian menunjukkan bahwa kerugian ekonomi akibat kemacetan lalu lintas di simpang Armada Town Square Mall Magelang dari arah Yogyakarta sebesar 147,13 liter per hari untuk gasoline dan 777,82 liter untuk solar. Estimasi kerugian ekonomi akibat kemacetan lalu lintas dalam rupiah sangat bervariatif menurut jenis bahan bakar yang digunakan. Kerugian minimal dalam satu hari adalah Rp. 4.950.000,- ketika menggunakan premium dan solar subsidi, sedangkan kerugian maksimum adalah Rp. 9.940.000,- ketika menggunakan pertamax turbo dan pertamina dex.

Converting Vehicle to LPG/Vigas: A Simple Calculator to Assess Project Feasibility Eko Muh Widodo; Muhammad Imron Rosyidi; Tuessi Ari Purnomo; Muji Setiyo
Automotive Experiences Vol 2 No 2 (2019)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

One of the reasons for the slow conversion program from gasoline to LPG/Vigas is the uncertainty of profit or loss. Therefore, this article presents a simple calculator to assess the feasibility of investing in vehicle conversion, from gasoline to LPG/Vigas. Input parameters include estimated annual mileage, fuel consumption, gasoline prices, LPG / Vigas prices, the cost of the converter kit and its installation, engine standardization costs, maintenance costs with gasoline, and maintenance costs with LPG considered to produce output parameters that include Break Even Point (BEP), Payback period (PP), Net Present Value (NPV), and Internal Rate of Return (IRR).

LPG-Fueled Vehicles: An Overview of Technology and Market Trend Thomas Kivevele; Thirunavukkarasu Raja; Vahid Pirouzfar; Budi Waluyo; Muji Setiyo
Automotive Experiences Vol 3 No 1 (2020)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

This article presents an overview of the technology status and market trends of LPG-fueled vehicles through the literature approach to re-evaluate their future. In the review, it is discovered that LPG vehicles are globally increasing, though with a concentration in some countries. Of the 25 countries included in the World LPG Association (WLPGA) annual report 2018, Turkey, Poland, India, Ukraine, and Mexico are the countries with the best LPG vehicle trends in average of 23%. Meanwhile, Australia, Japan, South Korea, United Kingdom, the Netherlands, France, and Germany with a long history of implementing LPG as an alternative fuel has experienced a decline in the 2013-2017 period by 17%. This was allegedly due to the penetration of diesel-fueled vehicles over the last ten years. Moreover, developed countries experiencing decline have succeeded in developing electric-based vehicles such as Hybrid Electric Vehicle (HEV), Plug-in hybrid electric vehicle (PHEV), Battery Electric Vehicles (BEV), and Fuel Cell Electric Vehicles (FCEV) due to stringent demands for emission standards.

Evaluation of Operational Loading of the Light-Rail Transit (LRT) in Capital Region, Indonesia Djoko Wahyu Karmiadji; Muchamad Gozali; Anwar Anwar; Hedi Purnomo; Muji Setiyo; Ramli Junid
Automotive Experiences Vol 3 No 3 (2020)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

In 2015, the Indonesian government issued regulations to accelerate the implementation of integrated Light-Rail Transit (LRT) in the capital region and its surroundings. In order to ensure its operational safety, experimental work is required to test components’ strength of the manufactured LRT structures. Following the JIS 7105 standard test method, the strain and deflection of the structures were measured by vertical load, compression, rotation, and three-point load support test. The critical area estimated in the railroad structure were conducted according to the finite element method, in which strain gauges are installed in areas where the stress concentration exceeds nominal pressure, namely notches, bends, and junction areas. The result shows that the maximum stress on the LRT train structure occurs at the door, where maximum compressive strain value is -1082 μe » -75.74 MPa on the left and the maximum tensile strain value is 597 μe » 41.79 MPa at the right door. The results of fatigue load analysis represent the average stress (σm) and voltage amplitude (σa) at the coordinate system located in the Søderberg triangle. Meanwhile, the camber value with the full vertical load still has a positive value of 3.03 mm, which indicates a safe limit.

Captain Seat: Smart Solution for Physical Distancing on Buses During the Covid-19 Pandemic Muji Setiyo; Budi Waluyo
Automotive Experiences Vol 4 No 1 (2021)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

It has been a year after the announcement of Covid-19 outbreak in Wuhan. Activity restriction, implementation of health protocol, and lock-down are enforced to cut-off the spread of this virus. However, in the uncertainty towards a new normal, the mobility of people continues for various purposes. A rapid medical check-up at the airport or at railway stations is possible by the local authorities but it is impossible for public bus passengers due to the limitations of medical staff and a large number of bus stations. Most passengers also failed to comply with the government's recommendation to conduct a rapid test before using public buses. As anticipation, the Transportation Agency issued a regulation that all buses can only be filled with 50% (max) of their normal capacity by emptying 2 of the 4 seats in a row. As a consequence, a 32-seat bus can only be filled with 16 passengers (max) and the ticket price has doubled to cover operational costs. However, passenger interest in bus services has decreased due to high ticket prices. Therefore, this short article reports the smart actions of several bus companies in Indonesia to create a "Captain Seat", a 1-1-1 bus seat configuration to ensure physical distancing between passengers. With the captain seat model, buses with 32 seats are modified to 24 seats, the ideal distance between passengers during a pandemic can be maintained, the risk of loss to bus companies can be reduced, and passenger costs can be lowered.

Elemental, Thermal and Physicochemical Investigation of Novel Biodiesel from Wodyetia Bifurcata and Its Properties Optimization using Artificial Neural Network (ANN) Aditya Kolakoti; Bobbili Prasadarao; Katakam Satyanarayana; Muji Setiyo; Hasan Köten; Metta Raghu
Automotive Experiences Vol 5 No 1 (2022)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

In this study, an unexplored oil from the wodyetia bifurcata fruit was used for biodiesel production. The transesterification process was implemented to convert the raw oil into wodyetia bifurcata methyl ester (WBME) and the influence of process variables on WBME yield was examined with the response surface method (RSM) assisted Box-Behnken optimization. The results of RSM show that a maximum biodiesel yield of 94.67% was achieved and reaction time was identified as an influencing process variable. The fatty acid composition (FAC) from chromatography reveals the presence of highly unsaturated in WBME and the significant fuel properties of thermal and molecular meet the required fuel standards (ASTM). The obtained fuel properties of WBME are compared with other popularly used biodiesels and observed low kinematic viscosity (3.87mm2/sec) and moderated cetane number (53) for WBME. Furthermore, artificial neural network (ANN) tools are used for the prediction of WBME yield and show an improvement of 0.4% than RSM and low mean square error and a high coefficient of correlation was observed for ANN.

Strategy for Safe Passenger Transport during the COVID-19 Pandemic: From Review to Recommendation Retno Rusdjijati; Sumarno Adi Subrata; Zulfikar Bagus Pambuko; Muji Setiyo; Marcin Noga
Automotive Experiences Vol 5 No 2 (2022)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

The COVID-19 pandemic caused a large-scale disruption to countries worldwide particularly in road traffic changes and people mobility. To respond to this, a titanic amount of published studies had investigated those concerns. However, a study describing mitigation efforts relating to this pandemic in the transportation sector is scarce. On the other hand, the lack of coordination between transportation authorities, public transport operators, and passengers triggers complex issues including the accumulation of passengers at bus stations that potentially increase virus transmission. For this reason, this article intends to investigate and establish strategies for safe passenger transport. The finding of the article presented four basic strategies as follows: First, a coordinated response among stakeholders and government is needed to develop comprehensive policies. Second, coordinated demand management is required to maintain a balance between government policies and citizen demands. Third, provide health education on Personal Protective Equipment (PPE) to public transport crews. Fourth, protecting the passengers and maintaining trust in public transport services. Additionally, it is recommended to provide adequate infrastructure, perform regular check-ups (i.e. assessing body temperature before entering public transportation), provide up-to-date COVID-19 health alert, and implement health protocol. Also, when this pandemic is over, the use of fuel-based transportation needs to be reduced, especially for short trips. To optimize this strategy, the role of government and health authorities on the policy side is crucial. Also, a good response from public transport operators and passengers is the key to defeat the COVID-19 pandemic in the transportation area.

Co-Authors Abdul Wahid Jamin Aditya Kolakoti Aditya Kolakoti Aditya Kolakoti Agung Setyo Pambudi Agus Setiawan Ahmad Irfan Alper Calam Ambati Vijay Kumar Andi Widiyanto Andrizal Andrizal Andy Efendi Anwar Anwar Anwar Anwar Asnil Asnil Azuan Ahmad Bagas Arif Prasetyo Baginda Pangidoan Tanjung Bagiyo Condro P Bagiyo Condro Purnomo BAGYO CONDRO P Bambang Sudarmanta Battal Doğan Bobbili Prasadarao Budi Waluyo Budi Waluyo Chrisna Bagus Edhita Praja Damar Setyo Prakasa Darmawan Rois David Prayogo Derviş Erol Dhasa Ikrar Setyanansyach Dhasa Ikrar Setyanansyach Dori Yuvenda Dwi Ahmad R Dwi Ahmad Rizani Dwi Restianto Eko Muh Widodo Gaga Putra Setiawan Gozali, Muchamad Gunawan Refiadi Hary Abdul Hakim Hasan Köten Hedi Purnomo Heni Lutfiyati, Heni Heni Setyowati Esti Rahayu Indra Chandra Setiawan Jamaludin Jamaludin Jin Cherng Shyu Junid, Ramli Karmiadji, Djoko Wahyu Katakam Satyanarayana Khoirul Fa’i Kivevele, Thomas Krismadinata Krismadinata Laksono Trisnantoro Lalank Samudra Mukti Hidayat Leo Utoro Lilik Budiyarto Luki Fahmi Luthfi, Akbar Lutifyati, Heni Madihah Mohd Saudi Marcin Noga Margana Margana Marliyati Marliyati Martias Martias Mehmet Akçay Metta Raghu Moehamad Aman Mohamad Agus Ramly Muchamad Gozali Muhammad Imron Rosyidi Muhammad Iqbal Al-Fikri Muhammad Kunta Biddinika Muhammad Latifur Rochman Muhammad Luthfi Muhammad Mauludin Kharim Muhammad Rizal I Muhammad Rizal Ibrahim Nanang Apriandi Nasmi Herlina Sari Nor Azwadi Che Sidik Noto Widodo Noto Widodo Noto Widodo Oki Muraza Oktavi Barkah Lukmana Olusegun David Samuel Olusegun David Samuel Pirouzfar, Vahid Prasasti Bayu Aji Pramono Prasetyo, Bagas Arif Prima Nofan Ryastama Purnomo, Hedi Purnomo, Tuessi Ari Raghu Metta Ragil Widyorini Rahadian Zainul Rahmawan, Muhammad Andi Raja, Thirunavukkarasu Ramli Junid Randi Purnama Putra Ray Adhan Brieghtera Refaldy Pristiwantoro Remon Lapisa Rifqi Nugroho Riyan Adhy Pratama Riyan Tri Aditya Pamungkas Rizani, Dwi Ahmad Roni Muhammad Susanto Rosyidi, Muhammad Imron Rusdjijati, Retno Saifudin Saifudin Saifudin Saifudin Salih Özer Setyo Widiantoro Sofyan Kurniawan Sri Rizki Putri Primandari Sumarno Adi Subrata Suroto Munahar Susanto, Roni Muhammad Thirunavukkarasu Raja Thirunavukkarasu Raja Thomas Kivevele Tuessi Ari Purnomo Vahid Pirouzfar Wahyu Danu Romadlon Wahyu Sulistiyo Widha Bagus Fahriansyah Yusuf Dewantoro Herlambang Zulfikar Bagus Pambuko

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