Pengaruh Variasi Dimple Intake Manifold pada Water Injection System di Mesin 100cc Berbahan Bakar LPG Terhadap Konsumsi Bahan Bakar Spesifik

Mulyono, Novangga Adi and Akbar Ali, Reynaldi and Sihmaulana, Dwianto and Nurazaq, Warit Abi (2025) Pengaruh Variasi Dimple Intake Manifold pada Water Injection System di Mesin 100cc Berbahan Bakar LPG Terhadap Konsumsi Bahan Bakar Spesifik. Jurnal Teknik Terapan, 4 (1). pp. 30-35. ISSN 2829-615X

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Abstract

Abstract: The number of motorized vehicle users in Indonesia is increasing. Alternative fuels are needed to meet the needs of these motorized vehicles. One of the alternative fuels that can be used is LPG. However, in its application in motorized vehicles, LPG fuel has a weakness, namely that the engine temperature tends to be higher, thus affecting the performance and specific fuel consumption produced. One additional mechanism that can be used to optimize the use of LPG fuel in motorized vehicles is the water injection system. The addition of a water injection system to motorized vehicles can maintain the combustion chamber temperature, so that it can improve the results of specific fuel consumption. To optimize the use of the water injection system in motorized vehicles, variations in the intake manifold surface can be used, namely standard intake, tight dimple, and loose dimple. This study uses an experimental method by comparing three variations of the intake manifold surface. The use of this variation is expected to make the fuel mixture and water injection mix perfectly before entering the combustion chamber. The results of the data collection that have been carried out show that the lowest specific fuel consumption (SFC) is obtained by using a tight dimple intake manifold with water injection, with an average value of 0,014493209 kg/HP.hour at an engine speed of 7000 RPM. Keywords: Intake Manifold Variations, LPG, Specific Fuel Consumption, Water Injection System

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