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All Journal JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Teknik Sipil dan Arsitektur (JITAS) Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)
Iswandi Iswandi
Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Optimasi Multi-Respon Massa Roller dan Sudut Pulley untuk Peningkatan Karakteristik Daya dan Torsi pada Sistem Transmisi CVT Sepeda Motor Otomatis Khairul Suhada; B Umroh; Butar-Butar Hafidz; Muhammad Idris; Iswandi Iswandi
Rekayasa Material, Manufaktur dan Energi Vol 9, No 2: JULI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i2.31731

Abstract

The performance of a continuously variable transmission (CVT) system on a small-capacity automatic motorcycle is highly dependent on two adjustable components: roller mass and pulley angle. However, most previous studies have relied on a one-factor-at-a-time approach, adjusting either roller mass or pulley angle separately, thus their combined and interactive effects on engine performance have not been well quantified. This study addresses this gap by simultaneously optimizing roller mass and pulley angle on a 109.5 cc SOHC eSP automatic motorcycle to optimize engine power and torque. A Custom Design-based Response Surface Methodology (RSM) was applied, and thirteen experimental runs were tested on a dynamometer, with roller masses ranging from 11.4–15.6 g and pulley angles from 12.8°–14.2°. A Two-Factor Interaction (2FI) model was developed and evaluated using Analysis of Variance (ANOVA). Both models are highly significant (p 0.0001), with pulley angle identified as the dominant factor and the interaction (A × B) between roller mass and pulley angle statistically significant for both responses. Numerical optimization based on the desirability function yields an optimal configuration at a roller mass of 11.4 g and a pulley angle of 13.597°, which delivers an engine power of 4.777 W and an engine torque of 7.29 N•m with a desirability of 0.522. This validated predictive model quantifies the roller–pulley interaction and provides practical engineering guidelines for tuning automatic motorcycle CVTs to balance power and torque. 
Co-Authors Achmad Jusuf Zulfikar Ade Wahyu Nugroho Aginta Yolanda Andhika Ariyudha Anggih Prasetyo Wibisono B Umroh Bobby Umroh Butar-Butar Hafidz Darianto Darianto Darianto, Darianto Denny Fachri Mariadi Fachry Abda El Rahman Fauji S, Ahmad Felix Darwin Jaya Waruwu Haniza Husri Zarmawan Hutasoit, Nicolas Sabar Indra Hermawan Jufrizal Jufrizal Khairul Suhada Kurniawan, Fadly Ahmad Lubis, Rahmat Pande Raja Lumbantoruan, Jhonatan Mahliza Nasution Mahmuddin Al Rasid Malau, Vicky Frans Maulana, M Rizky Muhammad Idris Muhammad Irwanto Nasution, Heri Prinando Orlando, Corlenius Try Putra, Aldiansyah Ramadhan, Alfian Rizal Afandi Purba Rizky Fauzi Shera Dwy Sianturi, Danial Jack Marbis Syafruddin Ritonga Tino Hermanto Tumangger, Theo Fredrik Uun Novalia Harahap Yetti Meuthia Hasibuan Yopan Rahmad Aldori