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All Journal Politeknosain Journal of Automotive Technology Vocational Education
Basmal
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Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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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.
PENGARUH VISKOSITAS MINYAK PELUMAS TERHADAP KONSUMSI BAHAN BAKAR Afvin Ismaya Tanumurti; Basmal; Amiruddin, M.Pd., Muhamad
Journal of Automotive Technology Vocational Education Vol. 6 No. 2 (2025): Desember
Publisher : Pendidikan Vokasional Teknologi Otomotif, Universitas PGRI Yogyakarta

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Rapid technological advances in the automotive field have led to improvements in vehicle engine performance and efficiency. One crucial factor that supports engine performance is the lubrication system. The right viscosity value will help the lubrication process run optimally, reduce friction between components, and prevent premature damage to the engine. Fuel efficiency in motorcycles is a major concern for users because it is directly related to daily expenses. The purpose of this study is to determine the effect of lubricant viscosity on fuel consumption in the Mio Sporty. The methods used are literature study, observation, experimentation or testing, and documentation. After conducting several experiments using lubricants with different viscosities, it was found that the higher the viscosity, the more fuel was consumed. This is due to greater internal engine friction, which requires more power to maintain rotation, thereby impacting fuel efficiency. The conclusion is that the higher the oil viscosity, the greater the fuel consumption.   Keywords: oil viscosity, fuel consumption.
Co-Authors Afvin Ismaya Tanumurti Amiruddin, M.Pd., Muhamad Joko Nugroho, Kurniawan Sugiyarta