Analisis Pengaruh Sudut Kemiringan Pulley Motor Matic Terhadap Daya Dan Torsi Pada Continuously Variable Transmission

Raharya, Narezha (2026) Analisis Pengaruh Sudut Kemiringan Pulley Motor Matic Terhadap Daya Dan Torsi Pada Continuously Variable Transmission. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sepeda motor matic dengan sistem Continuously Variable Transmission (CVT) banyak digunakan karena kemudahan dan kenyamanan pengoperasiannya. Namun, masalah terkait dengan kinerja akselerasi dan penyaluran torsi kerap masih muncul. Salah satu faktor yang diyakini memengaruhi kinerja CVT adalah sudut pulley penggerak, karena sudut ini terkait langsung dengan perubahan rasio transmisi, tekanan sabuk, dan efisiensi penggerak keseluruhan dari mesin ke roda. Oleh karena itu, penelitian ini bertujuan untuk menganalisis pengaruh variasi sudut pulley penggerak terhadap daya dan torsi transmisi otomatis Honda Vario 125 cc. Metode penelitian yang digunakan adalah metode eksperimen dengan memvariasikan sudut pulley penggerak pada 14,9°, 14°, 13,8°, dan 13,5°. Setiap variasi diuji menggunakan dinamometer sasis (uji dyno) pada rentang kecepatan mesin 500–8000 RPM, dengan pengulangan uji ulang sebanyak tiga kali untuk mendapatkan data yang representatif. Parameter yang diamati meliputi daya maksimum dan torsi maksimum yang dihasilkan oleh mesin untuk setiap variasi sudut pulley. Hasil penelitian menunjukkan bahwa variasi sudut kemiringan drive pulley berpengaruh terhadap karakteristik daya dan torsi sepeda motor. Sudut kemiringan 13,8° menghasilkan performa paling optimal dengan daya maksimum sebesar 11,9 HP dan torsi maksimum sebesar 42,01 Nm, yang dicapai pada putaran mesin lebih rendah dibandingkan variasi sudut lainnya. Hal ini menunjukkan bahwa sudut kemiringan drive pulley yang lebih kecil mampu meningkatkan respons torsi dan efisiensi penyaluran tenaga, sehingga berpotensi meningkatkan performa akselerasi sepeda motor matic.
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Automatic motorcycles with Continuously Variable Transmission (CVT) systems are widely used due to their ease and comfort of operation. However, issues related to acceleration performance and torque transmission often arise. One factor believed to influence CVT performance is the drive pulley angle, as this angle is directly related to changes in transmission ratio, belt tension, and overall drive efficiency from the engine to the wheels. Therefore, this study aims to analyze the effect of varying the drive pulley angle on the power and torque of a Honda Vario 125cc automatic transmission. The research method used was an experimental method, varying the drive pulley angle at 14.9°, 14°, 13.8°, and 13.5°. Each variation was tested using a chassis dynamometer (dyno test) at an engine speed range of 500–8,000 rpm, with three repetitions to obtain representative data. The observed parameters included the maximum power and maximum torque produced by the engine for each pulley angle variation. The results of the study show that variations in the drive pulley tilt angle affect the power and torque characteristics of the motorcycle. The tilt angle of 13.8° produces the most optimal performance with a maximum power of 11.9 HP and a maximum torque of 42.01 Nm, which is achieved at a lower engine speed compared to other angle variations. This indicates that a smaller drive pulley tilt angle can improve torque response and power distribution efficiency, thus potentially improving the acceleration performance of automatic motorcycles.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Continuously Variable Transmission, Pulley
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL440 Motorcycles. T Technology > TS Manufactures
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Narezha Raharya
Date Deposited:	31 Mar 2026 04:13
Last Modified:	31 Mar 2026 04:13
URI:	http://repository.its.ac.id/id/eprint/132750

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