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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Pendidikan Vokasi Otomotif
Siregar, C A
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Aerospace Engineering Humanities Automotive Engineering Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Transportation

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Kajian Eksperimen Kemampuan Penyerapan Energi Pada Struktur Sarang Lebah Yang Diuji Secara Statis Lubis, Sudirman; Siregar, Ahmad Marabdi; Siregar, C A; Siregar, Irpansyah
Rekayasa Material, Manufaktur dan Energi Vol 4, No 1: Maret 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i1.6697

Abstract

The honeycomb structure is a natural or man-made structure (material) that has a honeycomb geometry, which is aimed at lightweight construction material companies, also getting a quality level from the material selection. The purpose of this study was to analyze the energy absorption ability of the statistical pressure tester. Energy absorption is a method of how an object attenuates due to external pressure. The energy absorption test was carried out by means of a statistical press test, the test object made from aluminum plates in the form of a honeycomb structure with different hexagonal size variations. This section will compare the results of the stress-strain and energy absorption data on each tested specimen to see which one is more efficient among the three specimens with different hexagonal sizes. The final result of this tester will use a graph of vertical stress - strain and energy absorption capability by horizontal and vertical testing. Therefore the results of the greatest energy absorption are in the horizontal test position with a hexagonal size of 2 mm, and the energy placement is in a vertical test position with a hexagonal size of 6 mm.
DESAIN DAN PEMBUATAN ALAT PEMBERSIH INJECTOR PORTABLE SEPEDA MOTOR BERBASIS FLASHER Firdaus Hutasoit, Ricky Togu; Siregar, Ahmad Marabdi; Siregar, C A
Jurnal Pendidikan Vokasi Otomotif Vol. 6 No. 1 (2023): (November)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpvo.v6i1.66000

Abstract

In the motorcycle system there is a component and the Electrical Full Injection System (EFI) of this Injector component functions to inject high-pressure fuel from the common rail according to the signal given by the ECU in a Tensioner contact state or the condition of the combustion chamber engine at Timin Injection optimum, the amount of fuel injection, fuel injection ratio and fogging conditions.Two-Way Electromagnetic controls the pressure in the chamber of the injector to control the start and finish of fuel injection.Orifice in the control chamber controls the angle of opening of the nozzle to control the ratio of fuel injection.Clogging of the nozzle holes causes the effect is that the acceleration power of the motorbike engine is decreasing. this makes it difficult for motorbikes to be operational again. After cleaning the dirt that clogs the injectors in the nozzle holes, making this tool can also extend the life of the injectors.Development is a process that is used to develop and investigate a product. The test results of this tool show that the injector cleaner works well. During testing with the Vario 125 motorbike, the injector misting produced +- 35 ml/minute. If an injector produces more than 15-20 ml/minute. Then the injector is still feasible to use and use.
Co-Authors Ahmad Marabdi Siregar Firdaus Hutasoit, Ricky Togu Siregar, Irpansyah Sudirman Lubis