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Effect of Dual External Exhaust System with Activated Charcoal and Reheater on Diesel Engine Exhaust Emissions muhammad riyadi, muhammad riyadi; Septiyanto, Angga; Wijaya, Burhan Rubai; Roziqin, Ahmad
Jurnal Inovasi Mesin Vol. 6 No. 1 (2024): APRIL 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v6i1.10229

Abstract

The increase in the mass and widespread use of diesel engines can lead to an increase in exhaust emissions, which can have a negative impact on the environment and human health with an increase in the number of vehicles and activities in workshops and test sites, there is a need to minimize the emission of exhaust gases during the process, The need for additional alternative methods that can help reduce emissions in places where there are potentially many vehicles in vehicle repair shops vehicle repair shops, at vehicle test sites and light vehicle practice places of automotive vocational high schools,, the development of additional equipment that is attached or added to an object without changing from that object or   after treatment tools It is still rarely found, especially in ordinary workshops, even official workshops are still uneven and not optimal, reducing exhaust gas levels when the vehicle stops or is static. This study uses an experimental method by making after treatment tools in the form of dual external exhaust systems that are attached to vehicles during emission testing and testing that emit smoke or vehicle exhaust emissions as an alternative effort in handling vehicle emissions, especially diesel engines. The tool in the form of a dual external exhaust system with activated charcoal and a reheater with temperature variations from the reheater at temperatures of 100 °C, 150 °C, and 250 °C is used in conventional diesel vehicles and common rail diesel vehicles. Tests are taken 3 times on each specimen/variation.  The results of this study show that first, there is an effect of dual external exhaust systems with activated charcoal and reheater on the exhaust gas emissions of conventional diesel engines, the effect obtained is a decrease in CO emission results from 0.47 to 0.10 with a percentage decrease of 78% and Opacity from 82 to 46 with a percentage of 44%. Then the second is the influence of dual external exhaust systems with activated charcoal and reheaters on the exhaust gas emissions of common rail type diesel engines. The effect obtained was a decrease in CO emission results from 0.05 to 0.01 with a percentage decrease of 80% and Opacity from 32 to 23 by 28%
Keefektifan Pengembangan Media Pembelajaran Berbasis Android dan Augmented Reality (AR) Terhadap Penguasaan Capaian Kompetensi Sistem Starter Untuk Siswa SMK Wijaya, M. Burhan Rubai; Anshorulloh, Abdur Rohman Robbani
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 17 (2024): Jurnal Ilmiah Wahana Pendidikan 
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.13897464

Abstract

This research aims to develop learning media based on Android and Augmented Reality (AR), to determine its feasibility, to determine the effectiveness of media use in mastering the competency achievements of the starter system, and to determine the responses of teachers and students to the media. The research method is research and development with a 4D development model. The research results are products in the form of Android-based learning media and Augmented Reality in the form of Android cellphone applications. The feasibility assessment results from material experts were 78.03% and media experts were 91.20%, so it was declared feasible in terms of material and very feasible in terms of media. The effectiveness test results from the One-Sample t-Test show 10.355 > 2.032 (t table) so H0 is rejected and Ha is accepted. The N-Gain test results show a value of 0.552, which is included in the criteria for moderate improvement, so this media is effective. The effectiveness results from research are the influence of the media in increasing mastery of the starter system's competency achievements. The teacher and student response instruments produced a score of 87.50% with the interpretation that the learning media application used was very good and very interesting. So it can be concluded that Android and Augmented Reality learning media are effective and are very good and very interesting media.
Development Of An Electric Motorcycle Trainer Kit As A Learning Medium For Electrical Engineering And Automotive Engineering Majors In Vocational High Schools Supraptono, Eko; Wibowo, Apriansyah; Wijaya, M. Burhan Rubai; Rohman, Shohihatur; Siraj, Ubaidillah; Qunefi, Fuat; Mubarak, Raihan Fa’iq; Baskoro, Aldo Luhung; Aryaditama, Geofan; Fathimah, Aisya Fathimah
Jurnal Abdimas Vol. 29 No. 1 (2025): June 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/pvn4eh96

Abstract

The increasing demand for electric vehicles (EVs) due to global warming and environmental issues necessitates specialized knowledge in this field. This research develops an electric motorcycle trainer kit designed to enhance learning in vocational high schools, specifically in the Electrical Engineering and Automotive departments. The research aimed to design and validate a trainer kit that accurately represents an electric motorcycle's electrical system, facilitating hands-on learning for students. The methodology involved data collection, product design, and implementation with validation by field experts. Results showed that the trainer kit significantly improved students' understanding and practical skills related to electric vehicle systems. In conclusion, the electric motorcycle trainer kit proved to be an effective educational tool, supporting the development of competencies required for the growing electric vehicle industry. Further improvements in the aesthetic and technical aspects of the kit could enhance its future applications.