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<![CDATA[Brake spesific fuel consumption, brake thermal efficiensy, dan emisi gas buang mesin bensin EFI dengan sistem EGR berbahan bakar premium dan butanol ]]>
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Syaiful, Syaiful]]>;
<![CDATA[Syarifudin, Syarifudin]]>
<![CDATA[ TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020 ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Metro ]]>
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DOI: 10.24127/trb.v9i2.1178
<![CDATA[The increase in vehicle volume causes an increase in the use of gasoline fuel and air pollution. Therefore, alternative fuels such as butanol are one of the solutions to overcome this problem. Butanol has a high octane value and oxygen content so that the combustion process is more perfect and reduces exhaust emissions. The use of butanol is expected to improve engine performance and reduce exhaust emissions. The purpose of this study was to observe the effect of butanol on gasoline engines with the EGR system on Brake Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE), and exhaust emissions. Testing uses a Toyota Kijang 7K gasoline engine with an EFI fuel system. The percentage of butanol used is 5%, 10%, 15% in the condition without EGR, hot EGR, and cold EGR. The test is carried out at a fixed engine rotation speed of 2500 rpm. Retrieval of engine performance data using a dynamometer while the exhaust emissions using the GA analyzer. The test results showed the addition of butanol increased the BSFC value by 0.9% and BTE by 2%. However, a decrease occurred in CO emissions by 74.2% and HC by 33.6% compared to pure premium. The use of hot EGR decreased BSFC by 19.3% and BTE by 23.9%. The highest CO emissions were 3.23% while the highest HC emissions of 259 ppm occurred in the use of cold EGR.Keywords : butanol, EGR, BSFC, BTE, exhaust gas emissions]]>
<![CDATA[Rancang Bangun Mesin Steam Jet Mini Portable Power Spayer ]]>
<![CDATA[Akhmadi, Amin Nur]]>;
<![CDATA[Fatkhurrozak, Faqih]]>;
<![CDATA[Sanjaya, Firman Lukman]]>
<![CDATA[ IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April ]]>
Publisher : <![CDATA[CV. IRA PUBLISHING ]]>
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DOI: 10.56862/irajtma.v3i1.95
<![CDATA[This research discusses the mini portable power spayer steam jet machine by testing it with a flow meter to find out the specifications. This machine is designed to be easily moved from one place to another. This machine has a pump that can create high water pressure. This steam jet machine can be operated using a DC motor. This machine is usually built with materials that are resistant to corrosion and durable for long-term use. To create a mini portable power spayer steam jet machine that has a simple, cheap, easy to operate and maintain system, this machine must be designed so that easy to move from one place to another, both indoors and outdoors, must be able to produce water vapor at a high enough pressure to clean dirt, the design must consider safety aspects to protect users from injury or potential danger, by designing the machine mini portable power spayer pump with dimensions that match those on the market, realized with real and existing designs and products, by testing with a flow meter, the test was carried out with a spray result of 6 liters/minute according to specifications. Making a design for a mini portable power spayer steam engine pump with an inventor that is realized is the same as choosing a product on the market. The process of testing the mini portable power spayer steam machine with a flow meter measuring tool produces a water jet pressure of 6 liters/minute, when tested with a flow meter spayer gun in a straight water jet pressure position.]]>
<![CDATA[Perancangan Sistem Suspensi Dan Analisis Pegas Sepeda Motor Listrik Phb Menggunakan Finite Elemen Metode (FEM) ]]>
<![CDATA[Budi, Sigit Setijo]]>;
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Ayu, Fitri]]>
<![CDATA[ Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022 ]]>
Publisher : <![CDATA[Fakultas Teknik UMSU ]]>
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DOI: 10.30596/rmme.v5i1.10261
<![CDATA[Currently, motorcycles in general and especially electric motorcycles, are equipped with various technologies, one of which is a suspension system. Electric motorcycle suspension has advantages, one of which is the damping of the rear suspension and has a suspension that is comfortable for daily mobility and tends to be soft when passing through damaged roads. The purpose of this study was to determine the load of the suspension using the finite element method. In this study, the springs received loads of 60kg, 80kg, 100kg and 120kg. From the results of this study, ST 37 suspension has better performance compared to AISI 1020.]]>
<![CDATA[Pelatihan Perakitan Mobil Listrik bagi Siswa SMK N 1 Adiwerna ]]>
<![CDATA[Usman, Mukhamad Khumaidi]]>;
<![CDATA[Fatkhurozzak, Faqih]]>;
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Aryanto, Nur Aidi]]>;
<![CDATA[Akhmadi, Amin Nur]]>;
<![CDATA[Budi, Sigit Setijo]]>
<![CDATA[ IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 2 No 2 (2024): Agustus ]]>
Publisher : <![CDATA[CV. IRA PUBLISHING ]]>
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DOI: 10.56862/irajpkm.v2i2.116
<![CDATA[One very important component of an electric car is the battery. Batteries are used as a current source for the entire electrical system and as a place to store electrical energy during the charging process. The power consumption of an electric car with a brushed DC motor drive. To find out the power consumption at a certain constant speed and the battery capacity used, the maximum distance that can be traveled can be calculated. The partner's problem is that there are no activities to assemble electric cars and calculate battery requirements for the power required by electric car. The implementation method uses the method of socialization and training or direct practice. The socialization method is carried out by inviting vocational school students to the mechanical engineering laboratory of Harapan Bersama Polytechnic to be given an explanation and knowledge about the basic principles of electric cars, the main components of electric cars and how to calculate the power required by electric car to be assembled, the activity will be held on June 9 2022 with the result being an increase in students' skills in assembling electric cars. Knowledge of calculating battery power and assembling batteries according to electric car needs, as well as correct electric car installation. The output resulting from this training is that students at SMK N1 Adiwerna have insight into battery circuits and electric car installations.]]>
<![CDATA[EFEK BLENDING BAHAN BAKAR TERBARUKAN BUTANOL 5% PADA PERTAMAX TERHADAP PERFORMA MESIN BENSIN EFI 150 CC ]]>
<![CDATA[Budi, Sigit Setijo]]>;
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Fatkhurrozak, Faqih]]>;
<![CDATA[-, Syarifudin]]>;
<![CDATA[Riyono, Agus Hut]]>
<![CDATA[ Power Elektronik : Jurnal Orang Elektro Vol 13, No 1 (2024): POWER ELEKTRONIK ]]>
Publisher : <![CDATA[Politeknik Harapan Bersama Tegal ]]>
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DOI: 10.30591/polektro.v13i1.6590
<![CDATA[Butanol is an alternative energy that is being developed to overcome the energy crisis. This is because butanol has a high Octane number and oxygen content so it can optimize engine performance. This research was carried out to determine the impact of adding butanol to Pertamax on gasoline engine performance. The engine used is a 150 cc EFI petrol engine. The fuel uses Pertamax with butanol additive. Testing uses speed variations of 1000 – 3000 rpm. Test results: The performance of the 150 cc EFI petrol engine using the Pertamax-butanol mixture (P95B5) has increased compared to using pure Pertamax fuel (P100). This can be seen from the increase in torque and power with Pertamax-butanol fuel (P95B5) of 3.57 N.m and 1.12 kW, the highest increase at rpm 3000. Engine fuel consumption decreased when butanol was added compared to pure Pertamax (P100). The lowest fuel consumption occurred with Pertamax-butanol (P95B5) fuel at 0.21 ml/s when the engine speed was 100 rpm. Meanwhile, the highest fuel consumption occurred in Pertamax fuel (P100) at 0.62 ml/s when the engine speed was 3000 rpm]]>
<![CDATA[Pengaruh Kecepatan Putaran dan Pemakanan terhadap Permukaan Baja ST 41 pada Mesin Bubut ]]>
<![CDATA[Akhmadi, Amin Nur]]>;
<![CDATA[Usman, Mukhamad Khumaidi]]>;
<![CDATA[Sanjaya, Firman Lukman]]>
<![CDATA[ IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 3 (2024): Desember ]]>
Publisher : <![CDATA[CV. IRA PUBLISHING ]]>
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DOI: 10.56862/irajtma.v3i3.157
<![CDATA[This study discusses the effect of feed rate and machine rotation speed on the surface roughness of ST 41 steel in the flat turning process. The aim is to determine the relationship between variations in rotation speed (100 rpm, 300 rpm, and 500 rpm) and feed rate on the final surface results of the workpiece. The method involves cutting tests on ST 41 steel specimens with a diameter of 25 mm and a length of 400 mm with various rotation speed variations. The results show that at low rotation speed (100 rpm), the surface of the workpiece tends to be rough. The surface becomes better at medium speed (300 rpm), while at high speed (500 rpm), the surface results are smoother. These findings indicate that increasing rotation speed contributes to a decrease in surface roughness. Thus, higher rotation speeds can improve the quality of turning results.]]>
<![CDATA[IMPLEMENTASI KARAKTERISTIK BIOFUEL PADA MESIN UNTUK MENINGKATKAN KOMPETENSI PERAWATAN MESIN KENDARAAN BAGI SISWA SMK ]]>
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Syarifudin, Syarifudin]]>;
<![CDATA[Fatkhurrozak, Faqih]]>;
<![CDATA[Akhmadi, Amin Nur]]>;
<![CDATA[Satrio, Riyan Ade]]>;
<![CDATA[Mubarok, Abdullah]]>
<![CDATA[ JMM (Jurnal Masyarakat Mandiri) Vol 9, No 2 (2025): April ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Mataram ]]>
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DOI: 10.31764/jmm.v9i2.29353
<![CDATA[Abstrak: Penggunaan biofuel pada mesin kendaraan sudah banyak diapliaksikan sebagai bentuk penanggulangan krisis bahan bakar. Teknologi mesin pun berkembang guna menyesuaikan penggunaan biofuel. SMK berperan dalam mencetak lulusan yang siap kerja dengan menyesuaikan kebutuhan industri. Oleh karena itu, perlu adanya pelatihan perawatan mesin berbahan bakar biofuel bagi siswa jurusan Teknik Sepeda Motor SMK Muhammadiyah Kramat. Hal ini bertujuan agar siswa memiliki kompetensi perawatan mesin berbahan bakar bifuel sehingga siswa setelah lulus dapat bersaing didunia kerja khususnya dibidang mekanik sepeda motor. Pelatihan ini dilaksanakan dengan jumlah peserta sebanyak 22 siswa jurusan Teknik dan Bisnis Sepeda Motor. Pelatihan ini menggunakan metode ceramah dengan materi pengertian biofuel, karakteristik bahan bakar, prinsip kerja biofuel dalam proses pembakaran dan efek penggunaan biofuel pada mesin. Metode lainnya adalah demontrasi tentang cara kerja sistem injeksi berbahan bakar biofuel dan penggunaan scaner EFI untuk diagnosa kerusakan mesin. Diakhir kegiatan dilakukan evaluasi dalam bentuk post-test dan penilaian praktikum. Hasil evaluasi menunjukan bahwa nilai siswa mengalami peningkatan setelah mengikuti pelatihan pada setiap indikator capaiannya. Rata-rata peningkatan nilai indikator capaiannya adalah 54% dan seluruh siswa yang mengikuti pelatihan dinyatakan kompeten. Abstract: The use of biofuel in vehicle engines has been widely applied as a form of overcoming the fuel crisis. Engine technology has also developed to adjust the use of biofuel. Vocational schools play a role in producing graduates who are ready to work by adjusting to industry needs. Therefore, biofuel engine maintenance training needs to be provided for students majoring in motorcycle engineering at Muhammadiyah Kramat Vocational School. This aims to ensure that students have the competence to maintain biofuel engines so that after graduating students can compete in the world of work, especially in motorcycle mechanics. This training was carried out with 22 participants majoring in Motorcycle Engineering and Business. This training uses a lecture method with material on the definition of biofuel, fuel characteristics, the working principles of biofuel in the combustion process, and the effects of using biofuel on engines. Another method is a demonstration of how the biofuel injection system works and the use of an EFI scanner to diagnose engine damage. At the end of the activity, an evaluation was carried out in the form of a post-test and practical assessment. The evaluation results showed that student scores increased after participating in the training on each of their achievement indicators. The average increase in the achievement indicator score was 54% and all students who participated in the training were declared competent.]]>
<![CDATA[PENGUATAN KOMPETENSI SISWA SMK MELALUI IMPROVISASI KOMPETENSI BIOGASOLINE ]]>
<![CDATA[Syarifudin, Syarifudin]]>;
<![CDATA[Suhartana, Suhartana]]>;
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Fatkhurrozak, Faqih]]>;
<![CDATA[Susilawati, Susilawati]]>
<![CDATA[ JMM (Jurnal Masyarakat Mandiri) Vol 9, No 2 (2025): April ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Mataram ]]>
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DOI: 10.31764/jmm.v9i2.29964
<![CDATA[Abstrak: Lulusan vokasi seperti Sekolah Menengah Kejuruan (SMK) menjadi penyumbang terbesar angka pengangguran. Fenomena ini bertolak belakang dengan orientasi pembelajaran yang diterapkan yang menggunakan metode praktikum berbasis project based learning (PBL). SMK Jurusan Teknik Sepeda Motor adalah jurusan yang memiliki potensi penyerapan tenaga kerja terbesar dengan mempertimbangkan fenomena volume kendaraan bermotor yang terus meningkat. Program Pengabdian ini bertujuan meningkatkan kompetensi sepeda motor bagi siswa Teknik Sepeda Motor SMK Muhammadiyah Kramat Kabupaten Tegal. Metode yang digunakan adalah PBL yang diterapkan melalui Workshop propertis bahan bakar dan Workshop Karakteristik bahan bakar. Kegiatan dilaksanakan pada tanggal 21 Juni 2024 bertempat di bengkel Teknik Sepeda Motor SMK Muhammadiyah Kramat Kabupaten Tegal yang diikuti 20 siswa kelas XI. Berdasarkan hasil evaluasi, siswa kelas XI memperoleh peningkatan kompetensi sepeda motor dengan prosentase 20%. Hal ini ditunjukkan dari hasil pengukuran kompetensi awal melaluisi pada PreTest dengan capaian penguasaan sebesar 68% dan meningkat menjadi 88% melalui pengukuran pada evaluasi PostTest. Pemberian materi propertis bahan bakar, performa dan karakteristik bahan bakar yang dilakukan melalui workshop dengan metode PBL terbukti dapat terserap secara maksimal.Abstract: Vocational graduates such as Vocational High Schools (SMK) are the largest contributors to unemployment. This phenomenon is in contrast to the applied learning orientation which uses a practical method based on project based learning (PBL). SMK Motorcycle Engineering Department is a department that has the greatest potential for absorbing labor considering the phenomenon of the increasing volume of motorized vehicles. This Community Service Program aims to improve motorcycle competence for Motorcycle Engineering students at SMK Muhammadiyah Kramat, Tegal Regency. The method used is PBL which is implemented through the Fuel Properties Workshop and Fuel Characteristics Workshop. The activity was carried out on June 21, 2024 at the Motorcycle Engineering workshop of SMK Muhammadiyah Kramat, Tegal Regency which was attended by 20 class XI students. Based on the evaluation results, class XI students obtained an increase in motorcycle competence with a percentage of 20%. This is shown from the results of the initial competency measurement through the PreTest with a mastery achievement of 68% and increasing to 89% through measurements in the PostTest evaluation. The provision of material on fuel properties, performance and fuel characteristics carried out through workshops using the PBL method has proven to be maximally absorbed.]]>
<![CDATA[Pelatihan Penggunaan Gas Analyzer untuk Mengingkatkan Kompetensi Motor Bakar dengan Mengukur Emisi Gas Buang Mesin di SMK Bina Nusa Slawi ]]>
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Fatkhurrozak, Faqih]]>;
<![CDATA[Syarifudin, Syarifudin]]>;
<![CDATA[Ardiyanto, Riky]]>
<![CDATA[ Jurnal Pengabdian Masyarakat Progresif Humanis Brainstorming Vol 6, No 2 (2023): Jurnal Abdimas PHB : Jurnal Pengabdian Masyarakat Progresif Humanis Brainstormin ]]>
Publisher : <![CDATA[Politeknik Harapan Bersama ]]>
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DOI: 10.30591/japhb.v6i2.4432
<![CDATA[Jurusan otomotif merupakan jurusan yang sangat diminati masyarakat karena dianggap memiliki peluang kerja yang tinggi. Namun, untuk bersaing dan berkompetesi dalam dunia kerja harus memiliki kompetensi yang baik dibidangnya. Pengetahuan dalam menganalisa, merawat dan memperbaiki mesin kendaraan adalah kompetensi dasar yang harus dimiliki lulusan SMK jurusan otomotif untuk dapat mendapatkan kerja. Pengabdian ini bertujuan untuk memberikan pelatihan kepada siswa dalam kompetensi motor bakar dan menganalisis kondisi mesin dengan mengukur kadar emisi gas buang mesin menggunakan Gas Analyzer. Pengabdian ini laksanakan di SMK Bina Nusa Slawi, Kabupaten Tegal. Pelatihan ini memberikan pengetahuan yang lebih mendalam tentang motor bakar dibanding dengan materi yang diberikan di sekolah. Hal ini karena pelatihan ini mengoptimalkan engine cutting dan gas analyzer sebagai media pembelajaran. Selain itu, hasil evaluasi pelatihan menunjukan 50% siswa optimal memahami motor bakar dan 50% siswa lainnya sangat optimal memahami motor bakar. Siswa juga mendapatkan ketrampilan dalam mengukur emisi gas buang motor bakar menggunakan gas analyzer. Dampak positif lainnya adalah guru-guru jurusan TBSM termotivasi untuk memberikan pembelajaran yang lebih baik lagi kepada siswa-siswanya dengan mengoptimalkan trainer yang ada sebagai media pembelajaran.]]>
<![CDATA[Improvisasi Biogasolin pada Workshop Optimalisasi Kompetensi Otomotif Kelas XII SMK Bhakti Praja Adiwerna Tegal ]]>
<![CDATA[Syarifudin, Syarifudin]]>;
<![CDATA[Fatkhurrozak, Faqih]]>;
<![CDATA[Sanjaya, Firman Lukman]]>;
<![CDATA[Yohana, Eflita]]>;
<![CDATA[Syaiful, Syaiful]]>;
<![CDATA[Muhammad, Muhammad]]>;
<![CDATA[Suhartana, Suhartana]]>
<![CDATA[ Jurnal Surya Masyarakat Vol 7, No 2 (2025): Mei 2025 ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Semarang ]]>
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DOI: 10.26714/jsm.7.2.2025.180-189
<![CDATA[The largest contributors to unemployment are vocational high school graduates and Generation Z aged 15 to 24 years. This is contrary to the motto of vocational high schools as vocational schools prepare human resources equipped with Hard skills and Soft Skills as well as technological insight as needed by the business world and industry. Therefore, to reduce this phenomenon, grade XII students or prospective vocational high school alumni are given additional current insights and competency reviews through the Workshop on optimizing automotive competencies and developing Biogasoline fuel. The community service program aims to optimize automotive competencies in EFI-based fuel systems and provide insight into automotive developments regarding alternative Biogasoline fuels. The community service program students are 25 grade XII students of SMK majoring in Motorcycle Business Engineering where the department has wide job opportunities due to the development of motorized vehicles of the Motorcycle type. The methods applied are Workshops and case studies prepared through studies of EFI-based fuel systems and biogasoline as alternative fuels. The community service program was carried out on December 12 and 13, 2023 smoothly and successfully. Students' automotive competence in EFI-based fuel systems and insight into automotive technology developments in alternative gasoline fuels have been optimally achieved from 15.43% to 89.14%. The provision of workshop materials accompanied by demonstrations of automotive components accelerates students' understanding.]]>
