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AEEJ : Journal of Automotive Engineering and Vocational Education
Published by Universitas Negeri Padang
ISSN : 2722404X     EISSN : 27224031     DOI : https://doi.org/10.24036/aeej.v1i1.1
Core Subject : Science, Education, Engineering,
Automotive Engineering Control & Systems Engineering Education Energy Transportation
Focus and Scope Fokus dari AEEJ adalah untuk menjadi sebuah sarana publikasi artikel-artikel ilmiah dari kajian bidang Teknik Otomotif secara praktis dan teoritis. Scope dari AEEJ yakni pada kajian teknik otomotif dan pendidikan kejuruan teknik otomotif yang secara rinci dipaparkan berikut ini. Teknik Otomotif Yang termasuk dalam lingkup kajian Teknik Otomotif ini adalah : 1. Teknologi pada kendaraan ringan 2. Teknologi alat berat 3. Manajemen Bengkel Otomotif 4. Teknik body dan pengecatan 5. Teknologi bahan bakar 6. Sistem kontrol elektronik otomotif 7. Kajian lain yang masih memiliki kaitan dengan otomotif Pendidikan Kejuruan Teknik Otomotif Yang termasuk dalam lingkup kajian Pendidikan Kejuruan Teknik Otomotif ini adalah : 1. Media pembelajaran 2. Evaluasi pembelajaran 3. Penelitian tindakan kelas 4. Pembelajaran jarak jauh 5. Kajian lain yang masih memiliki kaitan dengan pendidikan kejuruan otomotif
Arjuna Subject : Teknik (semua kategori) - Teknik Otomotif
Articles 161 Documents
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Bioethanol Production from Sugarcane Bagasse and Pineapple Peel Waste and Its Combustion Characteristics Diswanto Diswanto; Wawan Purwanto; Ahmad Arif; M. Yasep Setiawan; Irma Wirantina Kustanrika
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 7 No 1 (2026): Vol 7 No 1 (2026) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v7i1.312

Abstract

Growing demand for renewable fuels has increased interest in converting agricultural and fruit-processing residues into bioethanol. This study evaluated sugarcane bagasse and pineapple peel waste as feedstocks for bioethanol production and compared the combustion characteristics of the resulting fuels. Bioethanol was produced through pretreatment, hydrolysis, fermentation using yeast, and distillation. The samples were then examined based on boiling-point range, flame color, flame height, flame area, and flame duration at fuel volumes of 1, 2, and 3 mL. The pineapple peel bioethanol showed a boiling-point range closer to ethanol and produced flame-height values closer to pure ethanol, particularly with 8 g yeast, whereas Pertamax generated the highest flame height and flame area overall. These results indicate that sugarcane bagasse and pineapple peel waste are promising feedstocks for preliminary bioethanol production, with pineapple peel showing better combustion-related characteristics among the waste-derived samples.
Fuel Consumption and Air–Fuel Ratio of a Modified-Compression-Ratio Engine Using 8- and 10-Hole Injectors with E90–E100 Bioethanol Blends M. Reza; Wawan Purwanto; Toto Sugiarto; Budi Utomo Wisesa
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 7 No 1 (2026): Vol 7 No 1 (2026) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v7i1.313

Abstract

High-bioethanol blends require appropriate fuel-injection control, particularly in engines with modified compression ratios. This study evaluated fuel consumption and air–fuel ratio (AFR) of a modified-compression-ratio spark-ignition engine using 8- and 10-hole injectors with E90, E95, and E100 blends. Experiments were conducted at engine speeds from 2000 to 8000 rpm. Fuel consumption was measured using a flow meter, while AFR was recorded during dynamometer testing. Fuel consumption increased with engine speed for both injector types. E90 produced the lowest average fuel consumption, at 1.102 L/hour for the 8-hole injector and 1.209 L/hour for the 10-hole injector. Across all fuel blends, the 8-hole injector showed lower average fuel consumption, whereas the 10-hole injector showed a narrower AFR range. These findings indicate that injector-hole configuration and high-bioethanol blend composition should be considered when tuning fuel delivery in modified-compression-ratio engines.
Development and Content Validation of a Psychomotor Assessment Instrument for Conventional Distributor-Type Diesel Fuel System Maintenance Sugeng Riyadi; Tatang Permana; Muhammad Maris Al Gifari
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 7 No 1 (2026): Vol 7 No 1 (2026) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v7i1.315

Abstract

Psychomotor assessment in vocational high schools often remains subjective and insufficiently standardized, particularly in practical automotive learning related to conventional distributor-type diesel fuel systems. This study developed a performance assessment instrument to evaluate students’ technical competence in vocational automotive education more objectively. A Research and Development design adapted from Sugiyono’s model was applied up to the expert validation stage. The instrument comprised three integrated components: a Job Sheet, Work Sheet, and Assessment Sheet, structured using hierarchical indicators of psychomotor assessment from Imitation (P1) to Naturalization (P5). Five experts, consisting of three content experts and two assessment-instrument experts, evaluated the instrument using a four-point Likert scale. The validation data were analyzed using Aiken’s V to examine content, construct, language, and usability validity. The results showed that all components obtained Aiken’s V values above 0.80, indicating valid expert judgment across the assessed aspects. The developed instrument provides an initial valid basis for more structured, transparent, and consistent assessment of diesel fuel system maintenance skills in vocational practice.
Android-Based Learning Media Designed with Figma for Mechanical Measuring Instruments in Vocational Automotive Education Arga Farid Ahmadi; Setyo Bhahak Fendi Baihaqi; Rizqi Fitri Naryanto
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 7 No 1 (2026): Vol 7 No 1 (2026) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v7i1.316

Abstract

Repetitive and conventional learning can make mechanical measuring instrument topics difficult for vocational students to understand. This study developed and initially evaluated Android-based learning media designed with Figma for Mechanical Measuring Instruments. The research used the ADDIE development model with a pre-experimental one-group pretest–posttest design involving Grade X TKRO students. Product feasibility was assessed by media and material experts, while learning outcomes were examined through pretest, posttest, t-test, N-Gain, and student responses. The media expert score was 85.4%, and the material expert score was 90.8%, both in the very feasible category. The average score increased from 43.6 in the pretest to 80.2 in the posttest. The reported t-test value was 44.892 > 2.026, with an N-Gain of 0.67, indicating moderate improvement. Student responses reached 86.5%, categorized as very good.
Air–Fuel Ratio Evaluation in Open-Loop ECU Mapping for a KZR Engine: A Trade-Off Analysis of Power, Torque, and Fuel-Efficiency Potential Muhammad Ilham Ramadhan; Tatang Permana
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 7 No 1 (2026): Vol 7 No 1 (2026) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v7i1.318

Abstract

An open-loop ECU operates without oxygen-sensor feedback, making Air–Fuel Ratio (AFR) control dependent on the preset fuel map. This study evaluated how three AFR settings in open-loop ECU mapping relate to the performance characteristics of a Honda KZR engine. A dynamometer-based experiment was conducted on a Honda Vario 125 KZR engine using Pertalite RON 90 and AFR targets of 11.7, 13.1, and 14.1. The evaluated parameters were engine power, torque response, and fuel-efficiency potential inferred from AFR characteristics. The results showed that AFR 13.1 produced the highest reported power output of 11.0 HP, whereas AFR 14.1 indicated a more favourable fuel-efficiency potential. AFR 11.7 represented an over-rich setting with the least favourable efficiency tendency. These findings indicate a trade-off between performance-oriented and economy-oriented AFR settings in open-loop ECU mapping.
Feasibility Evaluation of a 110 cc-Class Automatic Motorcycle Engine Cutaway for Supporting Practical Curriculum Implementation in Automotive Vocational Education Ichsan Nasution; Hasan Maksum; Waskito Waskito; Dwi Rangga Ariga
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 7 No 1 (2026): Vol 7 No 1 (2026) : AEEJ : Journal of Automotive Engineering and Vocational Educa
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v7i1.323

Abstract

Automatic motorcycle engines are closed mechanical assemblies that limit students’ observation of internal components during vocational practice. This study developed and evaluated the feasibility of a 110 cc-class automatic motorcycle engine cutaway for supporting practical curriculum implementation in automotive vocational education. A Research and Development design with the ADDIE model was used. The product exposed key components, including the piston, cylinder, combustion chamber, crankshaft, valve mechanism, lubrication passages, and automatic transmission section, as a real-object medium for observing automatic engine mechanisms. Feasibility data were obtained from two media experts, two material experts, and responses from 25 Automotive Engineering students after limited implementation. Five-point Likert-scale data were analyzed descriptively. Media expert validation reached 86%, and material expert validation reached 90%, both categorized as highly feasible. Student responses reached 90%, categorized as very good. The cutaway was feasible and accepted, although learning effectiveness was not measured.
Pemanfaatan Bioetanol Limbah Kelapa Muda dan Pengaruhnya Terhadap Emisi Sepeda Motor Empat Langkah Injeksi Sugiartono Sugiartono; Wagino Wagino; Darul Afdal; Retno Wahyudi
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 1 No 1 (2020): AEEJ : Journal of Automotive Engineering and Vocational Education
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v1i1.1

Abstract

This article discusses the use of Pertamax fuel and young coconut bioethanol with mixed variations (BE5, BE10, BE15, BE20) on injection step motorcycle exhaust emissions. The methodology used in this study is the post test only design control, one of the research in qualitative research. The research data is primary data, obtained directly on the gas analyzer during the trial. All data is then collected, looking for average test results, described and closed with a different test (t test). Based on the data obtained at the time of testing there was a decrease in CO and HC gas levels with each additional amount of young coconut ethanol in Pertamax fuel. The results of the difference analysis test (t test) are not significant, t arithmetic <t table which means accepted and rejected. Can reduce the use of young coconut bioethanol mixture has variations in CO and HC emission reduction, but the reduction rate is not significant Artikel ini bertujuan untuk membahas pengaruh penggunaan bahan bakar pertamax dan bioetanol kelapa muda dengan variasi campuran (BE5, BE10, BE15, BE20) terhadap emisi gas buang sepeda motor empat langkah injeksi. Metodologi yang digunakan dalam penelitian ini adalah post test only control desain, salah sau pendekatan riset dalam penelitian kualitatif. Data penelitian merupakan data primer, didapatkan secara langsung pada alat gas analizer pada saat uji emisi. Seluruh data kemudian dihimpun, di cari rata-rata hasil pengujian, di deskripsikan serta ditutup dengan uji beda (uji t). Berdasarkan data yang didapatkan pada saat pengujian terjadi penurunan kadar gas CO dan HC pada setiap peningkatan jumlah campuran bioetanol kelapa muda pada bahan bakar pertamax. Hasil dari analisis uji beda (t test) pengaruh penambahan campuran tidak signifikan, t hitung < t tabel yang berarti Ho diterima dan Ha ditolak. Dapat disimpulkan penggunaan campuran bioetanol kelapa muda memiliki pengaruh penurunan kadar emisi gas CO dan HC, tetapi angka penurunan tidak signifikan.
Upaya Meningkatkan Hasil Belajar Siswa pada Mata Pelajaran Gambar Teknik Otomotif Melalui Model Pembelajaran Kooperatif Tipe Team Assisted Individualization (TAI) pada Siswa Kelas X Jurusan Teknik Kendaraan Ringan Otomotif di SMK Negeri 1 Padang Nurhidayani Nurhidayani; Wakhinuddin Simatupang
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 1 No 1 (2020): AEEJ : Journal of Automotive Engineering and Vocational Education
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v1i1.2

Abstract

The purpose of this study was to determine whether the use of cooperative learning model Assisted Individualuization Teams (TAI) can improve student learning outcomes on the subjects of class X Pictures of Automotive Engineering Department of Automotive Light Vehicle SMK Negeri 1 Padang. This type of research is the study design Quasi Experiment, Experiment Quasi design used is Nonequivalent Control Group Design. Overall that experimental class is better than the control class with a percentage of 5.2% influence. Thus it can be concluded that there is the effect of the use of TAI learning model to increase the results of class X student on subjects Picture of Automotive Engineering at SMK Negeri 1 Padang. Tujuan dari penelitian ini adalah untuk mengetahui apakah penggunaan model pembelajaran kooperatif tipe Teams Assisted Individualuization (TAI) dapat meningkatkan hasil belajar siswa pada mata pelajaran Gambar Teknik Otomotif kelas X Jurusan Teknik Kendaraan Ringan Otomotif SMK Negeri 1 Padang. Jenis penelitian ini adalah penelitian dengan desain Quasi Experiment, desain Quasi Experiment yang digunakan adalah Nonequivalent Control Group Design. Secara keseluruhan diperoleh hasil bahwa kelas ekperimen lebih baik dibandingkan dengan kelas kontrol dengan persentase pengaruh sebesar 5,2%. Dengan demikian dapat ditarik kesimpulan bahwa ada pengaruh penggunaan model pembelajaran TAI terhadap peningkatan hasil belajar siswa kelas X pada mata pelajaran Gambar Teknik Otomotif di SMK Negeri 1 Padang.
Optimasi Electromagnetic Regenerative Shock Absorber (ERSA) Tipe Magnet Batang Alnico pada Suspensi Belakang Multi Purpose Vehicle (MPV) Andri Fadhil; Hasan Maksum; Wanda Afnison
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 1 No 1 (2020): AEEJ : Journal of Automotive Engineering and Vocational Education
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v1i1.3

Abstract

This study aims to optimize the electrical energy generation generated by the Electromagnetic Regenerative Shock Absorber (ERSA) type of alnico bar magnet on the rear suspension Multi Purpose Vehicle. This study uses the Taguchi Experiment method by varying the number of copper windings (1000, 1500, 2000 turns), wire diameter (0.2 mm, 0.3 mm, 0.4 mm) and large air gap (2 mm, 3 mm, 4 mm). The results showed the highest electrical voltage generation of 1.68V in 2000 wire coil variants, 0.4 mm wire diameter and 4 mm air gap. while the lowest voltage generated electricity is 0.9V on 1000 wire coil variants, 0,2 mm diameter diameter and 2 mm air gap. That is, an increase in the voltage generated by using the Taguchi Experiment method from previous studies which produced a voltage of 121-131mV. Penelitian ini bertujuan untuk mengoptimalkan energi listrik bangkitan yang dihasilkan oleh Elektromagnetik Regenerstif Shok Absorber (ERSA) tipe magnet batang alnico pada suspensi belakang Multi Purpose Vehicle. Penelitian ini menggunakan metode Eksperimen Taguchi dengan memvariasikan jumlah lilitan tembaga (1000, 1500, 2000 lilitaan), diameter kawat (0,2 mm, 0,3 mm, 0,4 mm) dan besar celah udara (2 mm, 3 mm, 4 mm). Hasil penelitian didapatkan tegangan listrik bangkitan paling tinggi sebesar 1,68V pada varian lilitan kawat 2000, diameter kawat 0,4 mm dan celah udara 4 mm. sedangkan tegangan listrik bangkitan paling rendah sebesar 0,9V pada varian lilitan kawat 1000, diameter kawar 0,2 mm, dan celah udara 2 mm. Artinya, terjadi peningkatan tegangan yang dihasilkan dengan menggunakan metode Eksperimen Taguchi dari penelitian sebelumnya yang menghasilkan tegangan sebesar 121-131mV.
Analisis Variasi Penggunaan Busi pada Sepeda Motor Yamaha Vixion Tahun 2015 Terhadap Daya, Torsi dan Emisi Gas Buang Adriansyah Prasetiyo; Rifdarmon Rifdarmon
AEEJ : Journal of Automotive Engineering and Vocational Education Vol 1 No 1 (2020): AEEJ : Journal of Automotive Engineering and Vocational Education
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/aeej.v1i1.4

Abstract

This study aims to determine the effect of the use of variations of spark plugs on power, torque and exhaust emissions produced by Yamaha Vixion motorcycles in 2015. This study uses an experimental method with three variations of spark plugs. The results of research on nickel spark plugs obtained a maximum power of 12.7 Kw, a maximum torque of 11.14 N.m and exhaust gas emissions with CO levels of 4.24%, CO2 9.03%, HC 1214ppm. In platinum spark plugs there is an increase in power of 1.55%, torque of 0.89% torque and exhaust emissions with levels of 5.18% CO, 9.2% CO2, HC 1134ppm. Furthermore, iridium spark plugs have an increase in power of 4.5%, a torque of 3.47% and exhaust gas emissions with CO levels of 5.27%, CO2 9.6%, HC 1293ppm. That is, there is an influence from the use of variations of spark plugs on power, torque and exhaust emissions on Yamaha Vixion motorcycles in 2015. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan variasi busi terhadap daya, torsi dan emisi gas buang yang dihasilkan oleh sepeda motor Yamaha Vixion tahun 2015. Penelitian ini menggunakan metode eksperimen dengan tiga variasi busi. Hasil penelitian pada busi nikel didapatkan daya maksimal sebesar 12,7Kw, torsi maksimal sebesar 11,14 N.m dan emisi gas buang dengan kadar CO 4,24%, CO2 9,03%, HC 1214ppm. Pada busi platinum terdapat peningkatan daya sebesar 1,55%, torsi torsi 0,89% dan emisi gas buang dengan kadar CO 5,18%, CO2 9,2%, HC 1134ppm. Selanjutnya, pada busi iridium terdapat peningkatan daya sebesar 4,5%, torsi sebesar 3,47% dan emisi gas buang dengan kadar CO 5,27%, CO2 9,6%, HC 1293ppm. Artinya, terdapat pengaruh dari penggunaan variasi busi terhadap daya, torsi dan emisi gas buang pada sepeda motor Yamaha Vixion tahun 2015.

Page 9 of 17 | Total Record : 161

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