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Program Studi Mesin Otomotif, Politeknik Pratama Mulia Surakarta
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Pengaruh Temperatur Udara Dingin Terhadap Konsumsi Bahan Bakar pada Gasoline Engine Basmal; Sugiyarta
Politeknosains Vol 19 No Edisi Khusus (2020): Jurnal Politeknosains Volume 19 Edisi Khusus - Juli 2020
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Gasoline engines are still being developed by motor vehicle manufacturers, both for small vehicles, namely motorbikes and medium-sized vehicles, namely cars with cylinder volumes below 2000 cc. The development of the gasoline engine continues, especially in the fuel system. Regarding the fuel system for production in 2020, it almost uses an injection system that has experienced improvements from the previous generation. The use of this system cannot be separated from the performance of the Electronic Control Unit (ECU) for optimizing the gasoline engine. The change in temperature of the air entering the combustion chamber which tends to be cold will certainly affect fuel consumption. The purpose of this study was to determine the effect of cold air on fuel consumption. The research was conducted at the Automotive Machinery Laboratory of the Pratama Mulia Surakarta Polytechnic in 2020. From an average of 5 experiments using pertalite type fuel in the Toyota Rush engine, the following results were obtained: intake air temperature was 20-250C, at engine speed 1000 rpm = 56 ml, 1500 rpm = 76 ml, 2000 rpm = 90 ml, air temperature 30-320C at engine speed 1000 rpm = 46 ml rpm, 1500 rpm = 63 ml, 2000 rpm = 80 ml. The intake air temperature tends to be low, so the fuel consumption will be less.
Pengaruh Penguat Hibride Partikel Serbuk Arang Sekam Padi dan Kalsit Terhadap Sifat Mekanik pada Komposit Polyester Resin Basmal; Joko Sukarno; Siswanto
Politeknosains Vol 16 No 1 (2017): Jurnal Politeknosains Volume 16 Nomor 1 - Maret 2017
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

The study entitled "Strengthening Effect of Particle Hibride Charcoal Rice Husk Powder and Mechanical Properties of Calcite Against On Polyester Resin Composites" aims to determine the effect of the volume fraction of filler partkel hibride the mechanical properties of composite properties. Mechanical properties of the composite hibride researched include flexural strength properties of the standard ASTM D 790, Impact strength properties of the standard ASTM D 5941 and ASTM standard fuel properties ktahanan D 635.dan SEM fracture morphology to determine the composite. Matrix composites using Unsaturated Polyester Resin BQTN 157, Filler hibride using rice husk charcoal powder and powder kalisit 60-80 mesh 100-120 mesh with a total weight of the filler fraction of 50%. Percentage ratio between the weight fraction of filler hibride rice husk powder and powder calcite are: 15:35, 20:30, 25: 25, 30:20. MEKP hardener using 1 wt% Matrix Resin. Material is mixed using a mixer rotation of 100 rpm for 5 minutes. Making composite by means poured into the mold by holding time of 30 minutes. Composite specimens given rain water immersion treatment for 20 days. The test results in getting the highest mechanical properties of the composite specimens: The flexural strength 95.54 N / mm2, the impact strength of 5.97 kJ / mm2, and fuel resistance properties rate of 0.10 mm / sec. Lowest mechanical properties is obtained: The flexural strength 84.17 N / mm2, the impact strength of 5.10 kJ / mm2, and fuel resistance properties rate of 0.19 mm / sec.
Pengaruh Rendaman Terhadap Perubahan Sifat Mekanik Komposit Polyester Resin - Partikel Arang Sekam Padi Siswanto; Fahmi Eka Saputra; Basmal
Politeknosains Vol 15 No 2 (2016): Jurnal Politeknosains Volume 15 Nomor 2 - September 2016
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Engineering materials utilizing waste Charcoal Husk Rice Particles (PASP) as a filler in the unsaturated polyester resin matrix composite BQTN 157, aims to determine the effect of soaking to changes in mechanical properties of flexural strength and impact strength in the composite specimen. Polyester resin material mixed with a kind of BQTN 157 charcoal husk rice particles (PASP) vf 40%, 1% wt hardener. Material is poured into the mold, holding time 30 minutes. Composites are made based on the test specimen flexural and impact test specimens. Composite given treatment soaking for 150 hours with a variation of the fluid; rain water, mineral water, and water wells with 10 wt% water vinegar. Specimens in doing testing of flexural strength ASTM D 790 standards and impact testing standard ASTM D 5941 to determine the mechanical properties of the composite. Testing Results indicates that the flexural strength of the composite without treatment 35,50 N / mm2, while the composite with the treatment had an average flexural strength: mineral water Soaking 34.53 N / mm2, rain water soaking 34.66 N / mm2, soaking water wells + 10% Vinegar 32.89 N / mm2,. Tests on the impact strength shows that the impact strength of the untreated composites 4,16 kJ / mm2, while composites with bath treatment had an average impact strength as follows: Soaking mineral water 3,62 kJ / mm2, rain water soaking 3,35 kJ / mm2 , well water soaking + 10% Vinegar 2,98 kJ / mm2.
Co-Authors Fahmi Eka Saputra Joko Sukarno Siswanto Sugiyarta