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All Journal Journal of Vocational Education and Automotive Technology
Diana Langgeng Mustikawati
Universitas Ivet
Engineering

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PENGARUH PROGRAM 5S DAN JOBSHEET YAYASAN TOYOTA ASTRA TERHADAP KOMPETENSI OVERHAUL BERSTANDAR SKKNI KELAS XII TKR 4 DI SMK N1 SEDAN Abdul Aziz; Fuad Abdillah; Bayu Ariwibowo; Diana Langgeng Mustikawati
Journal of Vocational Education and Automotive Technology Vol 8 No 1 (2026): Journal of Vocational Education and Automotive Technology
Publisher : Ivet University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joveat.v8i1.4456

Abstract

Penelitian kuantitatif korelasional ini bertujuan untuk mengetahui pengaruh penerapan program 5S dan penggunaan jobsheet Toyota Technical Academy (YTA) terhadap kompetensi overhaul berstandar SKKNI pada siswa kelas XII TKR 4 SMK Negeri 1 Sedan. Menggunakan teknik simple random sampling berdasarkan Nomogram Harry King, diperoleh sampel sebanyak 30 siswa dari total populasi 36 siswa. Data dikumpulkan melalui angket, dokumentasi, dan observasi praktik, lalu dianalisis menggunakan uji regresi linear berganda. Nilai Fhitung pada ketiga aspek tersebut lebih kecil dari Ftabel (2,052) dan nilai signifikansinya lebih besar dari ?= 0,05. Hasil koefisien determinasi (R2) juga menunjukkan pengaruh kedua variabel bebas sangat rendah, yaitu hanya sebesar 9,4% pada nilai praktik, 2,2% pada teori, dan 6,7% pada sikap. Berdasarkan hasil tersebut, Ha penelitian ditolak, yang berarti tidak terdapat pengaruh yang signifikan dari program 5S dan jobsheet YTA terhadap nilai overhaul berstandar SKKNI di sekolah tersebut.
PENGARUH RE-MAPPING ECU DENGAN VARIASI BUSI TERHADAP PERFORMA MESIN MATIC 150 CC Ridwan Novianto; Sena Mahendra; Fahmy Zuhda Bahtiar; Diana Langgeng Mustikawati
Journal of Vocational Education and Automotive Technology Vol 7 No 2 (2025): Journal of Vocational Education and Automotive Technology
Publisher : Ivet University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joveat.v7i2.4315

Abstract

Technological advances in the automotive industry encourage humans to produce new innovations. including motorbikes with an EFI system. The EFI system at the factory is considered not to produce maximum power, therefore it is necessary to re-map the ECU on EFI system vehicles. The research results show that (1) The highest torque is when using racing spark plugs with a fuel mapping of 3%, an ignition angle of 1°, the torque increases by 11% at 4,000 rpm; (2) Highest power at 3% fuel mapping, 1° ignition angle with racing spark plugs, power increases 9% at 5,000 rpm; (3) The best SFC when using racing spark plugs and ECU remapping fuel at 5%, 2° ignition angle, achieves a reduction of 13% at 6,000 rpm; (4) In exhaust gas emissions, CO levels decreased by 59% in standard ECUs with racing spark plugs, the lowest CO2 in fuel mapping ECUs with 10% ignition angle 3° standard spark plugs, HC experienced the highest reduction of 15% with standard spark plugs in fuel mapping ECUs. 5% ignition angle 2°. The lowest O2 reduction is 40% when using ECU fuel mapping 3% ignition angle 1° standard spark plug.
Co-Authors Abdul Aziz Bayu Ariwibowo Fahmy Zuhda Bahtiar Fuad Abdillah Ridwan Novianto Sena Mahendra