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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal PROSIDING SEMINAR NASIONAL CENDEKIAWAN Jurnal Teknik Mesin Cakram Jurnal Teknik Mesin Indonesia Otopro JTTM: Jurnal Terapan Teknik Mesin Jurnal Media Informatika Journal of Mechanical and Electrical Technology SAINSTECH: Jurnal Penelitian dan Pengkajian Sains dan Teknologi Tensile : Jurnal Pengabdian Kepada Masyarakat JIPTEK Prosiding SNTTM Strength : Jurnal Penelitian Teknik Mesin KARIR Jurnal Ilmiah Manajemen
Syaiful Arif
Universitas Pamulang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Pengaruh variasi rasio kompresi terhadap performa dan emisi mesin bensin 110 cc Hardianto, Resa; Syaiful Arif
Jurnal Teknik Mesin Indonesia Vol 21 No 1 (2026): April
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/jtmi2112026128

Abstract

Modifikasi geometri ruang bakar untuk merekayasa rasio kompresi merupakan pendekatan teknis dalam upaya optimalisasi efisiensi termal pada motor bakar pembakaran dalam (Internal Combustion Engine). Penelitian ini menyajikan analisis mengenai pengaruh variasi rasio kompresi terhadap karakteristik performa (torsi dan daya) serta emisi gas buang pada mesin bensin satu silinder berkapasitas 110 cc dengan sistem pengabutan karburator. Pendekatan eksperimental kuantitatif dilakukan dengan menguji tiga konfigurasi rasio kompresi: 8,9:1 (penurunan rasio/dekompresi), 9,3:1 (spesifikasi standar pabrikan), dan 9,7:1 (peningkatan rasio kompresi). Evaluasi performa mekanis diukur menggunakan instrumen chassis dynamometer, sementara konsentrasi polutan gas buang dianalisis menggunakan five-gas analyzer dengan mengacu pada metode keseimbangan atom karbon (Carbon Balance Method). Hasil pengujian menunjukkan bahwa penerapan rasio kompresi 9,7:1 menghasilkan luaran performa tertinggi, mencatatkan daya puncak sebesar 2,618 kW pada putaran mesin 6500 RPM (peningkatan sebesar 1,87% dari standar) dan torsi maksimum sebesar 8,22 Nm pada putaran 5750 RPM (peningkatan sebesar 7,12%). Sebaliknya, penurunan kompresi ke rasio 8,9:1 berdampak pada penurunan daya puncak menjadi 2,202 kW. Meskipun peningkatan rasio kompresi terbukti mampu menaikkan efisiensi volumetrik dan memicu peningkatan performa mekanis, modifikasi tersebut menghasilkan efek termodinamika sekunder berupa anomali pembakaran. Peningkatan tekanan mempersempit area sisa (clearance volume), yang memicu peningkatan efek wall quenching dan menjebak molekul bahan bakar pada crevice volume. Kondisi ini, diiringi dengan sifat bahan bakar uji, menyebabkan peningkatan emisi Hidrokarbon (HC) hingga mencapai 300 ppm. Analisis ini menyimpulkan bahwa peningkatan performa mekanis melalui modifikasi rasio kompresi pada mesin berkapasitas kecil mensyaratkan penyesuaian stoikiometri dan spesifikasi bahan bakar yang presisi guna menekan pembentukan emisi polutan.
SIMULATION OF FATIGUE AND DEFORMATION OF CARBON FIBER DRONE PROPELLERS USING THE FINITE ELEMENT METHOD (FEM) Syaiful Arif
Otopro Vol 21 No 2 May 2026
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v21n2.p51-59

Abstract

This study analyses finite elements in the structural calculation of a drone propeller in carbon fiber with loads that represent live use. The output of this study evaluates the effect of load variations on deformation, stress distribution, and safety factors as key indicators of structural performance. A three-dimensional propeller model is developed based on the actual geometric configuration and analysed using the Finite Element Method (FEM). Several loadings are considered: a base load with a total mass of 3.6 kg, and two additional loading conditions with increasing masses of 0.5kg and 0.75kg. The applied loads are converted into equivalent forces distributed along the propeller blades to simulate realistic operating conditions. Simulations show that increasing the applied load causes a proportional increase in the maximum deformation and a significant reduction in the minimum safety factor. The maximum deformation increases from 14.933mm at the base load to 18.044mm at the highest load. The blade tip is consistently identified as a critical region, where the highest deformation and stress concentration occur due to bending-dominated behaviour. The safety factor ranges from 0.51341 to 0.42489 as the load increases, indicating a decrease in structural safety. Fatigue loading is mentioned, this study addresses fatigue qualitatively based on stress concentration and safety factor trends, as explicit S–N curve data, load cycle definitions, and mean stress corrections are not included. The results emphasize the importance of structural optimization and accurate material modelling to improve the reliability and durability of carbon fiber drone propellers under various load conditions.
Co-Authors Abdul Isya Ade Reksa Adin Adin Agis Permana Ahya Hidayat alayuddin, Faqih Alfian Adi Saputra Ali Gunawan, Bambang Anggraeni, Erwinda Fenty Ardiansyah, Diki Ardiansyah, Fakih Arnando Fardian Bima Rizky Ananda Budiono, Lukni Arif Dedi Suprapto Diez Novitasari Dika Ridwan, Sandra Mayang Erwinda Fenty Anggraeni Fakih Ardiansyah Faridotuloh, Taufik Febriansyah, Mochamad Duta Haickal Fenty Anggraeni, Erwinda Fenty Anggreeni, Erwinda Firmansyah, Heical Gilang Maulana Gunawan, Bambang Ali Halomoan, Yosua Andhika Irfan Afandi Irwan Setiawan Isro Diyanto, Muhammad Januar Adam Anggito Abimanyu Joni Arif Juhaeri Kahlil Gibran, Muhammad Kauzario Koswara . Kurniadi Rasyid Lia Novita Mochamad Duta Haickal Febriansyah Mochamad Zakky Alhafidz Mohammad Rafli Juliansyah Muhamad Nur Purnadi Munzir Qadri Munzir Qadri Nur Rohmat Nur Rohmat Nurdin, Ade Akhyar Nurmansah Nurmisbahul Ulum Nurul Ikhsan, Muhamad Nurwijayanti Pangestu, Dimas Dahlan Perkasa, Mustasyar Prayitno, Pungkas Prayoga, Bagus Pungkas Prayitno Purwadi Purwadi Putu M Santika QOMARUZ ZAMAN Rafliansyah, Dhika Raksana, Roga Resa Hardianto Riana, Teguh Rustama, Daya Sabiqunassabigun Sabiqunassabiqun, Sabiqunassabiqun Sandra Mayang Dika Ridwan Santosa, Yogi Sustono Ubai Dillah Vikri Okta Yulianto Wahid Hasim Wibowo, Reson Widarto Widarto Yodhi Miftachul Hadi Yohan