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Firman Lukman Sanjaya
Universitas Harkat Negeri
Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Komparasi Paduan Ethanol dan Dietyl Ether (DEE) pada Gasoline Terhadap Performa Spark Ignition (SI) Engine Firman Lukman Sanjaya; Faqih Fatkhurrozak; Nur Aidi Ariyanto; Sigit Setijo Budi; Andre Budhi Hendrawan; Syarifudin
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.3105

Abstract

The limited availability of fossil fuels and the growing demand for energy have led to a global energy crisis. Ethanol and DEE can be used as alternative energy to replace fossil fuels. Ethanol and DEE have high RON and oxygen content, as well as low viscosity, which accelerates the flame, thereby increasing torque and SI engine power. DEE is still rarely used as a gasoline blend, but its chemical characteristics can improve engine combustion. This study aims to compare the use of gasoline-ethanol and gasoline-DEE blends on SI engine performance. The test results prove that the DEE15 blend produces the highest torque value of 4.37 N.m or an increase of 28% compared to pure gasoline. The E15 blend produces the highest SI engine torque value of 4.31 N.m or an increase of 26% compared to pure gasoline. In addition, SI engine power increases by 28% in DEE15 and 26% in E15 compared to pure gasoline. From these test results, the use of a gasoline-DEE blend can improve SI engine performance better than gasoline-ethanol.
Effects of Increasing Mangrove Bioethanol Content on Exhaust Gas Temperature and Exhaust Emission Characteristics of a Spark-Ignition Engine Syarifudin Syarifudin; Eflita Yohana; Muchamad Muchamad; Suhartana Suhartana; Firman Lukman Sanjaya; Faqih Fatkhurrozak; Mukhamad Khumaisi Usman
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Green Gasoline Mangrove was produced by blending gasoline with 5%, 10%, and 15% (v/v) mangrove bioethanol. Owing to its higher Research Octane Number (RON) and oxygen content than neat gasoline (G100), this fuel has the potential to improve combustion quality while producing cleaner exhaust emissions. This study aimed to investigate the effects of Green Gasoline Mangrove on the exhaust emission characteristics of a spark-ignition engine. Experimental tests were conducted using a spark-ignition engine mounted on an engine test bench under stationary operating conditions, while exhaust emissions were measured using an integrated gas analyzer. The results showed that increasing the bioethanol concentration was associated with higher NOx emissions and lower CO and HC emissions, accompanied by an increase in Exhaust Gas Temperature (EGT), indicating more complete combustion. At an engine speed of 5000 rpm, NOx emissions were 6.54%, 8.65%, and 11.81% higher for GM5, GM10, and GM15, respectively, whereas CO and HC emissions consistently decreased with increasing bioethanol content. In addition, EGT increased from 337°C for GM5 to 377°C for GM15. These findings indicate that Green Gasoline Mangrove enhances combustion characteristics and reduces CO and HC emissions; however, these improvements are accompanied by an increase in NOx emissions due to the higher combustion temperature.
Co-Authors Andre Budhi Hendrawan Eflita Yohana Faqih Fatkhurrozak Muchamad Muchamad Mukhamad Khumaisi Usman Nur Aidi Ariyanto Sigit Setijo Budi Suhartana Suhartana Syarifudin Syarifudin Syarifudin