Studi Eksperimen Pengaruh Perubahan Camshaft Dengan Variasi Ketinggian Lift Pada Engine Kapasitas 110 Cc Berbahan Bakar Etanol E100

Firmansyah, Riza Hariz (2026) Studi Eksperimen Pengaruh Perubahan Camshaft Dengan Variasi Ketinggian Lift Pada Engine Kapasitas 110 Cc Berbahan Bakar Etanol E100. Other thesis, institut teknologi sepuluh nopember.

Text 2039221096-Undergraduete-Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Camshaft merupakan salah satu komponen penting pada mekanisme katup yang berpengaruh terhadap proses pemasukan campuran udara dan bahan bakar serta pembuangan gas sisa pembakaran. Penggunaan Camshaft standar pada engine 110 cc belum tentu mampu menghasilkan performa optimal, terutama ketika menggunakan bahan bakar etanol E100 yang memiliki karakteristik nilai oktan tinggi dan panas penguapan besar. Permasalahan dalam penelitian ini adalah bagaimana pengaruh perubahan profil Camshaft dengan variasi ketinggian lift terhadap unjuk kerja dan emisi gas buang engine 110 cc berbahan bakar etanol E100. Penelitian ini menggunakan metode eksperimental dengan membandingkan tiga variasi Camshaft, yaitu Camshaft standar, Camshaft modifikasi lift +0,5 mm, dan Camshaft modifikasi lift +1 mm. Pengujian dilakukan menggunakan dynotest pada rentang putaran 2000–9000 rpm untuk memperoleh data daya dan torsi, sedangkan konsumsi bahan bakar digunakan untuk menghitung BSFC dan efisiensi termal. Selain itu, pengujian emisi gas buang dilakukan menggunakan gas analyzer pada kondisi idle. Hasil analisis menunjukkan bahwa variasi lift +1 mm memberikan performa terbaik pada kondisi cruising speed dengan daya sebesar 5,7582 hp, torsi sebesar 6,8398 N.m, BMEP sebesar 793,478 kPa, BSFC terendah sebesar 0,000141279 kg/kW.h, serta efisiensi termal tertinggi sebesar 58,3489%. Pada pengujian emisi, variasi lift +1 mm juga menghasilkan kadar CO terendah sebesar 0,47% dan HC sebesar 120 ppm, serta kadar CO₂ tertinggi sebesar 10,5%. Berdasarkan hasil tersebut, dapat disimpulkan bahwa peningkatan lift Camshaft mampu memperbaiki proses pengisian campuran udara dan bahan bakar ke ruang bakar, sehingga pembakaran menjadi lebih optimal, performa mesin meningkat, konsumsi bahan bakar lebih efisien, dan emisi pembakaran tidak sempurna menurun.
==================================================================================================================================
The Camshaft is one of the important components in the valve mechanism that affects the intake process of the air–fuel mixture and the exhaust process of combustion gases. The use of a standard Camshaft in a 110 cc engine does not necessarily produce optimal performance, especially when using E100 ethanol fuel, which has a high octane number and high latent heat of vaporization. The problem addressed in this study is how changes in Camshaft profile with variations in lift height affect the performance and exhaust emissions of a 110 cc engine fueled by E100 ethanol. This research used an experimental method by comparing three Camshaft variations, namely the standard Camshaft, the modified Camshaft with +0.5 mm lift, and the modified Camshaft with +1 mm lift. The tests were conducted using a dynotest within an engine speed range of 2000–9000 rpm to obtain power and torque data, while fuel consumption data were used to calculate BSFC and thermal efficiency. In addition, exhaust emission testing was carried out using a gas analyzer under idle conditions. The analysis results showed that the +1 mm lift variation produced the best performance under cruising speed conditions, with a power output of 5.7582 hp, torque of 6.8398 N.m, BMEP of 793.478 kPa, the lowest BSFC of 0.000141279 kg/kW.h, and the highest thermal efficiency of 58.3489%. In the emission test, the +1 mm lift variation also produced the lowest CO level of 0.47% and HC level of 120 ppm, as well as the highest CO₂ level of 10.5%. Based on these results, it can be concluded that increasing the Camshaft lift improves the filling process of the air–fuel mixture into the combustion chamber, resulting in more optimal combustion, improved engine performance, more efficient fuel consumption, and reduced incomplete combustion emissions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Camshaft, lift, engine 110 cc, etanol E100, daya, torsi, emisi gas buang. Camshaft, lift, 110 cc engine, E100 ethanol, power, torque, exhaust emissions.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Riza Hariz Firmansyah
Date Deposited:	04 Aug 2026 01:03
Last Modified:	04 Aug 2026 01:03
URI:	http://repository.its.ac.id/id/eprint/142793

Actions (login required)

View Item