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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.
Analisa Pengaruh Compression Ratio Terhadap Tekanan Kompresi Motor Dua Langkah. Basmal; Sugiyarta; Joko Nugroho, Kurniawan
Politeknosains Vol 22 No 2 (2023): Jurnal Politeknosains Volume 22 Nomor 2 - September 2023
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Motor bakar dua langkah adalah jenis motor pembakaran dalam yang setiap dua langkah torak atau satu putaran poros engkol terjadi satu kali pembakaran bahan bakar atau menghasilkan satu kali langkah usaha. Motor dua Langkah mempunyai konstruksi yang lebih sederhana dibanding dengan motor 4 langkah yang pada konstruksinya dilengkapi dengan katup-katup. Berdasarkan hasil pengamatan dengan merubah jumlah packing pada kepala silinder motor 2 tak diperoleh hasil hubungan antara perbandingan tekanan dengan tekanan kompresi hasil pengukuran dengan alat pengukur diperoleh sebagai berikut : Pada penambahan packing 1 rasio kompresi 6,69 : 1 dengan tekanan hasil pengukuran kompresi 12,75 kg/cm2 , dengan penambahan 2 packing rasio kompresi menurun menjadi 5,3 : 1 dengan tekanan 9,08 kg/cm2 dan saat dipasang 3 packing rasio kompresi menurun menjadi 4,29:1 dengan tekanan 7 kg/cm2. Dari hasil pengamatan dapat disimpulkan bahwa semakin banyak tambahan packing akan diperoleh tekanan kompresi semakin rendah.
Co-Authors Basmal Basmal Joko Nugroho, Kurniawan