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All Journal Lentera: Jurnal Ilmiah Kependidikan Jurnal E-Komtek Mitra Akademia: Jurnal Pengabdian Masyarakat Jurnal Kabar Masyarakat Recent in Engineering Science and Technology
Widiyatmoko
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Effect of Changing Primary Fixed Sheave Angle and Roller Weight on Torque, Power, Top Speed, and Acceleration on Matic Motorcycles Widiyatmoko; Arfan Ishartanto; Mike Elly Anitasari; Ma’rifat Al Hakim; Khoirul Mu'allif
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 6 No 2 (2022)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v6i2.1060

Abstract

This study aimed to determine the effect of angle changes on the primary fixed sheave and roller mass on torque, acceleration, engine power, and top speed of automatic motorcycles. This type of research is experimental research. The subjects in this study were 125 cc automatic motorcycles modified at the angle of the primary fixed sheave and the mass of the rollers. The angles of change were 14.5Ëš, 13.5Ëš, and 12.5Ëš; while the change in roller mass was 14, 13, and 12 grams. The testing began with tuning up the motorbike, then installing the fixed sheave and roller primary units that have been modified to the CVT (Continuously Variable Transmission) primary drive for further testing, and collecting the data using a dyno test tool. The results of this study show that: 1) Changes made to the primary drive pulley, especially to changes in the angle of the Primary fixed sheave and the weight or mass of the roller with the application simultaneously affect the torque, acceleration, engine power, and top speed of automatic motorbikes; 2) changing the angle of the primary fixed sheave (13.5Ëš) with the application of a roller weight of 13 grams can increase the maximum speed (top speed) by 0.4 (Kph) compared to the standard ones; 3) the increase in power and torque resulting from changes in the primary fixed sheave and the weight of the rollers applied at the same time do not significantly increase top speed and acceleration. Conversely, low power and torque do not necessarily reduce the top speed and acceleration of automatic motorcycles.
Analysis of Variation of Valve Gap Size on Power and Torque of a Four-stroke Motorcycle Widiyatmoko; Mike Elly Anitasari; Ari Fajar Isbakhi
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 7 No 1 (2023)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v7i1.1196

Abstract

This study aims to analyze changes in valve clearance on engine power and torque. The subjects in this study were four-stroke motorcycles with a cylinder capacity of 100 cc. The stages of the research included: 1) Preparation by adjusting the size of the inlet and outlet valve gaps with the dimensions in millimeters being 0.03, 0.05, and 0.07; 2) Testing using a dyno test; 3) The conclusion is based on the results of the dyno test tool print out data. Research results: 1) The maximum engine power achieved at the valve clearance size of 0.03 mm and 0.05 mm is 4.5 hp. Maximum engine power at 0.03 mm valve clearance is achieved at 6.42 rpm, while 0.05 mm valve clearance is achieved at 6.39 rpm; 2) The highest maximum engine torque among the three variations in valve clearance size, is 0.03 mm, which is 5.92 N.m at 3.081 rpm; 3) The size of the valve gap that is not by the standard specifications will significantly affect the power and torque of the engine.
Penyuluhan Keselamatan Berkendaraan ( Safety Riding) di Desa Kunir Kecamatan Mbutuh Kapupaten Purworjo Widiyatmoko; Mike Elly Anitasari; Arif Susanto
Jurnal Kabar Masyarakat Vol. 1 No. 4 (2023): November : JURNAL KABAR MASYARAKAT
Publisher : Institut Teknologi dan Bisnis Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54066/jkb.v1i4.1048

Abstract

The aim of safety riding outreach activities aims to provide knowledge and information about riding safety to the public so as to increase motorists' awareness of all the possibilities that may occur while riding. The stages of implementing activities are: 1) Analysis of program needs, 2) Activity planning, which is carried out in coordination with local residents. Everything is done by making a schedule to make it easier to carry out subsequent activities, 3) Carrying out activities by presenting safety riding material about riding safely and comfortably. Based on the results that have been carried out from planning, implementation to evaluation, it can be stated that community service activities are running well. From the results of the participant questionnaire, it was stated: 1) Implementation of activity programs with a percentage of 92 percent, 2) Mastery of resource material with a percentage score of 95 percent, 3) Usefulness of the material or program with a score of 89 percent, and 4) Participant satisfaction with a score percentage of 90 percent. This shows that the activity went very well and satisfied the participant
Pengembangan Jobsheet Pembelajaran Gambar Teknik dengan Autocad untuk Meningkatkan Minat Mahasiswa di Universitas Muhammadiyah Purworejo Jatmoko, Dwi; Primartadi, Aci; Widiyatmoko; Nur Afif, Iqfan
Lentera: Jurnal Ilmiah Kependidikan Vol. 15 No. 1 (2022): Lentera
Publisher : STKIP PGRI Bandar Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52217/lentera.v15i1.283

Abstract

This study aims to determine the feasibility of the AutoCAD Engineering Drawing learning Jobsheet which was developed to increase interest in learning and analyze how much the technical drawing competence increases in automotive engineering education students at Muhammadiyah University of Purworejo. This study uses a four-D model device development model with the research subjects taken are students of Automotive Engineering Education, University of Muhammadiyah Purworejo totaling 40 students with a sample of two class groups. Collecting data using a questionnaire method and quantitative data analysis test by taking a percentage of the research results. The results of the research show that: (1) the AutoCAD Jobsheet development procedure includes define, design, develop, disseminate searches. (2) Jobshet AutoCAD technical drawings are suitable for use as learning media. This can be proven from media and material experts who show a percentage of 90%. The AutoCAD engineering drawing jobsheet also meets the criteria very good. This is shown through student responses which include small group trials obtaining an average percentage of 69% and large group trials obtaining an average percentage of 77.56%. The results of the validation of media experts and material experts as well as the results of the small group test and large group test indicate that the module is feasible to use. Comparison of student learning interest in the experimental class and control class with a score of 77.56 experimental class and control class score of 68.25. Based on these results, the AutoCAD technical drawing Jobsheet can increase student interest in learning.
Electric Vehicle Conversion Study for Sustainable Transport Zainuri, Fuad; Hidayat Tullah, Muhammad; Prasetya, Sonki; Susanto, Iwan; Purnama, Dewin; Subarkah, Rahmat; Ramiati, Tia; Widiyatmoko; Noval, Rahmat
Recent in Engineering Science and Technology Vol. 1 No. 02 (2023): RiESTech Volume 01 No. 02 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i02.15

Abstract

The conversion of conventional motor vehicles to electric vehicles has become a popular choice in an effort to reduce greenhouse gas emissions and air pollution from transportation. Electric vehicle conversion involves replacing a gasoline or diesel engine with an electric motor and a reinstalled battery. In this paper, we cover the basics of electric vehicle conversion, conversion methods, and trial results of converted electric vehicles. We also discuss the benefits and challenges of converting to electric vehicles. Some keywords related to this topic include: electric vehicles, vehicle conversion, electric motors, batteries, sustainable transportation.
Pembangunan Kamar Mandi Untuk Masjid Baitussalam Sebagai Upaya Peningkatan Kualitas Kesehatan dan Sanitasi Hidayati, Noor; Widiyatmoko; Ekayuliana, Arifia; Syuriadi, Adi
Mitra Akademia: Jurnal Pengabdian Masyarakat Vol 6 No 2 (2023): Mitra Akademia: Jurnal Pengabdian Masyarakat
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/mapnj.v6i2.5107

Abstract

Baitussalam Mosque is located in the Kalibaru scenic housing estate, Kalibaru Village, Cilodong, Depok city of West Java Province. It was built in 2006 by the help of the red crescent body. In addition to being a place of worship, the Baitusaalm mosque actively carries out humanitarian activities such as free medical treatment, mass circumcision, donations for orphans, qur’anic recital and memorization (tahfiz) houses, and other activities. However, since its inception, the Baitussalam Mosque still does not have its own bathroom for male worshipers. Henceforth, the congregation is diverted to the bathroom of tahfidz's house. Meanwhile, the tahfidz house is still in the process of being renovated. Therefore, the Power Generation Study Program, Mechanical Engineering Department, Jakarta State Polytechnic wants to assist the mosque member in constructing the required facilities and infrastructure. The target of the service is to help build bathroom infrastructure for the mosque in order to improve the health and sanitation of the Baitussalam mosque congregation. The method begins with discussions with mosque administrators, site surveys, making bathroom designs as needed, and then the process of building Baitussalam Mosque toilets. The result of this community development activity is the completion construction of the bathroom which is followed by a small survey that denoted the satisfaction of the administrators and worshipers of the mosque.   Masjid Baitussalam, merupakan masjid yang berada di perumahan Kalibaru Permai Kelurahan Kalibaru, Cilodong, Depok. Masjid ini dibangun pada tahun 2006 oleh bantuan dari red crescent. Selain menjadi tempat ibadah masjid Baitusaalm aktif melakukan kegiatan kemanusiaan seperti pengobatan gratis, khitanaan massal, santunan anak yatim, rumah tahfiz serta kegiatan lainnya. Namun dari tahun 2006 hingga kini, Masjid Baitussalam masih belum memiliki kamar mandi untuk jamaah pria, sehingga jamaah akan dialihkan ke kamar mandi rumah tahfidz. Masalahnya, rumah tahfidz juga masih terus dalam proses pembangunan menggunakan dana donatur. Target pengabdi adalah membantu pembanguan prasarana kamar mandi untuk masjid Baitussalam, dalam rangka meningkatkan Kesehatan dan sanitasi jamaah masjid Baitussalam. Adapun metode pelaksanaan diawali dengan diskusi bersama pengurus masjid, survey lokasi, pembuatan design kamar mandi sesuai kebutuhan, dilanjutkan dengan proses pembangunan toilet Masjid Baitussalam. Hasil kegiatan ini adalah pembangunan kamar mandi yang ditandai dengan kepuasan dari pengurus serta jamaah Masjid Baitussalam menggunakan skala likert.
Co-Authors Achmad, Fariz Aci Primartadi Adi Syuriadi Anitasari, Mike Elly Arfan Ishartanto Ari Fajar Isbakhi Dewin Purnama Dwi Jatmoko Ekayuliana, Arifia Fuad Zainuri, Fuad Hidayat Tullah, Muhammad Iwan Susanto Khoirul Mu'allif Ma’rifat Al Hakim Noor Hidayati Noval, Rahmat Nur Afif, Iqfan Rahmat Subarkah Ramiati, Tia Sonki Prasetya