Modifikasi Sistem Pemasukan Bahan Bakar Karburator Menjadi Sistem Bahan Bakar Injeksi Pada Mesin 4 Langkah 1 Silinder 35 CC

Ardianto, Moh. Faizal (2024) Modifikasi Sistem Pemasukan Bahan Bakar Karburator Menjadi Sistem Bahan Bakar Injeksi Pada Mesin 4 Langkah 1 Silinder 35 CC. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Mesin pemotong rumput adalah salah satu jenis mesin otto cycle, dimana mesin pemotong rumput bersistem karburator pada sistem pemasukan bahan bakarnya. Karburator dikontrol secara mekanik, oleh sebab itu karburator sering mengalami permasalahan dan dirasa kurang sempurna dalam mensuplai bahan bakar, dan tidak bisa menyesuaikan kebutuhan bahan bakar sesuai kondisi mesin. Sehingga diperlukan perubahan sistem pemasukan bahan bakar agar kebutuhan mesin terpenuhi sesuai kondisi mesin juga kinerja dan efisiensi mesin tercapai.
Maka dilakukan modifikasi sistem pemasukan bahan bakar karburator pada mesin 4 langkah menjadi sistem EFI (Electronic Fuel Injection). Metode yang digunakan adalah metode eksperimen. Modifikasi dilakukan pada mesin pemotong rumput 4 langkah 1 silinder berkapasitas 35 CC. Eksperimen dilakukan dengan membandingkan kinerja mesin pemotong rumput dengan sistem pemasukan bahan bakar karburator dan sistem EFI.
Hasil yang didapatkan setelah melakukan proses pengujian didapatkan bahwa sistem injeksi memiliki tingkat pengkabutan yang sangat halus dan dapat menghasilkan unjuk kerja mesin yang baik. Hal tersebut dikarenakan didalam sistem injeksi bahan bakar dikabutkan dan akan membuat campuran udara-bahan bakar semakin homogen. Sehingga berpengaruh pada kecepatan pembakaran di dalam ruang bakar. Sistem pemasukan bahan bakar dengan unjuk kerja mesin terbaik pada penelitian ini adalah sistem injeksi . Dengan nilai rata-rata daya sebesar 3,99 HP, nilai rata- rata Torsi (T) sebesar 5,48 (Nm), nilai rata-rata BSFC sebesar 0.000000212601 Kg/W, nilai rata-rata BMEP sebesar 197,07 KPa, dan nilai rata-rata efisiensi termal sebesar 10,90 %. Pada uji emisi gas buang dengan nilai CO sebesar 4,27%, nilai CO2 sebesar 3,4%, nilai HC sebesar 4449 PPM, nilai O2 sebesar 13,65%
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A lawn mower is one type of otto cycle engine, where the lawn mower has a carburetor system in its fuel intake system. Carburetors are controlled mechanically, therefore carburetors often experience problems and are felt to be less than perfect in supplying fuel, and cannot adjust fuel needs according to engine conditions. So it is necessary to change the fuel intake system so that the engine needs are met according to engine conditions as well as engine performance and efficiency are achieved.
So a modification of the carburetor fuel intake system on a 4-stroke engine into an EFI (Electronic Fuel Injection) system is carried out. The method used is the experimental method. The modification was carried out on a 4-stroke 1-cylinder lawn mower with a capacity of 35 CC. The experiment was conducted by comparing the performance of the lawn mower with carburetor fuel intake system and EFI system.
The results obtained after conducting the testing process found that the injection system has a very smooth fogging level and can produce good engine performance. This is because in the injection system the fuel is atomized and will make the air-fuel mixture more homogeneous. So that it affects the combustion speed in the combustion chamber. The fuel intake system with the best engine performance in this study is the injection system. With an average value of power of 3.99 HP, average value of Torque (T) of 5.48 (Nm), average value of BSFC of 0.000000212601 Kg/W, average value of BMEP of 197.07 KPa, and average value of thermal efficiency of 7,16 %. In the exhaust emission test with CO value of 4.27%, CO2 value of 3.4%, HC value of 4449 PPM, O2 value of 13.65%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Karburator, Electronic Fuel Injection, Siklus Otto, Motor Bakar
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Moh. Faizal Ardianto
Date Deposited:	02 Aug 2024 22:37
Last Modified:	02 Aug 2024 22:37
URI:	http://repository.its.ac.id/id/eprint/112847

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