Wisasno, Sapto (2018) Optimasi Daya Motor 4 Langkah 250 cc Berbahan Bakar Gas pada Putaran Konstan dengan Variasi Tekanan Bahan Bakar dan Bukaan Katup (Throttle) - Gas Fueled Four Stroke 250cc Engine Power Optimation On Constant Speed With Variation Of Fuel Pressure And Opening Valve (Throttle). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Bahan bakar adalah salah satu kebutuhan utama di dunia perindustrian, bahan bakar juga merupakan salah satu masalah penting yang perlu dihadapi dalam dunia perindustrian, terutama bahan bakar minyak seperti bensin dan solar. Kenaikan harga bahan bakar minyak memunculkan kesadaran bahwa selama ini dunia masih sangat tergantung pada sumber energi tersebut. Indonesia merupakan salah satu negara yang memiliki permasalahan krisis energi. Cadangan energi semakin hari semakin menipis. Sumber energi alternatif yang dapat dikembangkan salah satunya adalah bahan bakar gas berupa LPG (Liquid Petroleum Gas) yang merupakan salah satu gas bumi dengan cadangan cukup besar di Indonesia. Pada umumnya motor bakar seperti sepeda motor masih menggunakan bahan bakar berbentuk liquid yaitu bahan bakar gasoline. Oleh karena itu, perlu adanya penelitian mengenai mesin motor berbahan bakar gasoline untuk dimodifikasi menggunakan bahan bakar gas LPG.
Pengujian dilakukan pada mobil Fin Komodo KD 250AT empat langkah berbahan bakar bensin yang dimodifikasi menjadi berbahan bakar gas LPG ( Liquefied Petroleum Gas ) 3 Kg yang diproduksi oleh pertamina. Mesin mobil bensin harus dimodifikasi agar bisa bekerja menggunakan bahan bakar gas LPG yaitu dengan cara penambahan konverter kit pada saluran intake. Tujuan pengujian adalah mencari pengaruh tekanan bahan bakar gas LPG untuk mendapatkan komposisi campuran yang paling ideal pada mesin mobil komodo. Metode yang dilakukan dengan cara membandingkan tekanan gas masuk ke ruang bakar pada variasi bukaan trhottle tertentu dan dibaca performanya dengan dynotest.
Dari hasil pengujian optimasi daya motor 4 langkah 250cc berbahan bakar gas pada putaran konstan dengan variasi tekanan bahan bakar dan bukaan katup (throttle) ini didapat data berupa trend laju konsumsi bahan bakar gas LPG tertinggi terjadi pada setting tekanan 20 mbar dengan laju konsumsi bahan bakar minimum 0,5851 kg/jam dan maksimum 5,7923 kg/jam, sedangkan Trendline laju konsumsi bahan bakar gas LPG terendah terjadi pada setting tekanan 5 mbar dengan laju konsumsi bahan bakar minimum 0,5851 kg/jam dan maksimum 4,7717 kg/jam. Putaran optimum tertinggi didapat dari setting tekanan 20 mbar pada bukaan throttle 78% dan diperoleh putaran 9800 rpm, sedangkan putaran optimum terendah didapat dari setting tekanan 5 mbar pada bukaan throttle 85% dan diperoleh putaran 8000 rpm. Pemakaian bahan bakar spesifik paling optimum terjadi pada setting tekanan 5 mbar dengan bukaan throttle 65% dan bsfc 2x10-4 kg/(watt.jam).
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Fuel is one of the main needs in the industrial world, fuel is also one of the important issues that need to be solved in the world of industry, especially fuel oils such as gasoline and diesel. The rise in the price of fuel oil increases the awareness that so far the world is still very dependent on these energy sources. Indonesia is one of the countries that have energy crisis problems. The energy reserves are getting thinner. One of the alternative energy sources that can be developed is a gas fuel in the form of LPG (Liquid Petroleum Gas) which is one of natural gas with large enough reserves in Indonesia. In general, some engine such as in motorcycles still use a liquid fuel, which is gasoline. Therefore, the research on gasoline-fueled motor engines to be modified using LPG gas fuel is needed.
The research was modifying the fuel of a Komodo KD 250AT fin 4 stroke which originally fueled by gasoline into 3 Kg LPG (Liquefied Petroleum Gas), a gas produced by Pertamina. In order to use the LPG fuel, the car's engine must be modified by adding the converter kit on the intake channel. The purpose of this modification is to find the effect of LPG fuel pressure to obtain the most ideal mixture composition in Komodo car. The method is by comparing the gas pressure that get into the combustion chamber with some different variations of the particular opening trhottles and checks its performance with the dynotest.
The Gas Fueled Four Stroke 250cc Engine Power Optimation On Constant Rotation With Variation of Fuel Pressure And Aperture Valve (Throttle) Test results data in the form of Trendlines. The Trendline with the highest LPG fuel consumption rate occurs at 20mbar pressure with minimum fuel consumption rate 0.5851kg/hr and maximum 5.7923 kg/hr, while the Trendline with the lowest LPG fuel consumption rate occurs at 5 mbar pressure with minimum fuel consumption rate 0.5851kg/hr and maximum 4.7173 kg/hr. The highest optimum rotation was obtained at 20mbar pressure on 78% opened throttle, which is 9800 rpm spin, while the lowest optimum rotation was obtained at 5mbar pressure on 85% opened throttle, which is 8000rpm. The most optimum use of specific fuel occurs at 5 mbar pressure on a 65% opened throttle and bsfc 2x10-4 kg/(watt.hr).
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 629.258 Wis o-1 3100018076672 |
| Uncontrolled Keywords: | engine, fuel, LPG, dynotest, throttle, bsfc. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ324.5 Fuel systems T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Sapto Wisasno |
| Date Deposited: | 09 Jan 2019 07:18 |
| Last Modified: | 11 Feb 2021 07:40 |
| URI: | http://repository.its.ac.id/id/eprint/58255 |
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