Pamuji, Agung (2016) Studi Eksperimen Pengaruh Mapping Ignition Timing Dan Durasi Penginjeksian Bahan Bakar Terhadap Unjuk Kerja Dan Emisi Gas Buang Engine Honda Cb150r Berbahan Bakar Bioetanol E100 Gayuh. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Kualitas bahan bakar sangat berpengaruh terhadap hasil
unjuk kerja engine, Hal ini berkaitan dengan berkembangnya
pemakaian bahan bakar bioetanol pada kendaraan. Untuk itu,
perlu dilakukan suatu penyesuaian ( setting ) yang bertujuan
mengetahui perbedaan hasil unjuk kerja dan emisi gas buang
dari penggunaan bahan bakar dengan properties yang berbeda
tersebut, serta dibutuhkannya suatu pengembangan Electronic
Control Unit yang mampu diprogram sehingga variasi
pembakaran dari sisi kontrol injeksi bahan bakar dan waktu
pengapian dapat dilakukan. Penelitian ini difokuskan pada
pemetaan ignition timing engine untuk mendapatkan titik
pengapian optimal dari bahan bakar bioetanol E100 yang
digunakan. Dengan demikian, diharapkan terjadi peningkatan
terhadap hasil unjuk kerja engine.
Penelitian diawali dengan modifikasi ECU SUMI-IT.
serta studi literatur mengenai bahan bakar Bioetanol E100.
Setelah itu pengujian penginjeksian bahan bakar untuk mencapai
AFR Bioetanol E100 dengan persentase penginjeksian sebesar
100, 125, 150, 175 dan 200 persen dari jumlah penginjeksian
bahan bakar standar. Kemudian dilakukan pengujian dengan
penggunaan Pertamax (bioetanol 0%) pada kondisi standar
sebagai kelompok kontrol dan penggunaan Bioetanol E100
dengan variasi ignition timing sebagai kelompok uji dengan
mengambil 5 variasi advance ignition timing 10°, 14°,18°, 22°,
dan 26° BTDC pada rasio kompresi yang telah dirubah menjadi
12, 12,5, dan 13.Pengujian dilakukan menggunakan Waterbrake
Dynamometer pada bukaan katup kupu-kupu penuh ( Fully Open
Throttle ) untuk memperoleh daya maksimum pada tiap putaran
mesin, dan pengaturan putaran mesin yang diinginkan dilakukan
dengan mengatur besarnya beban. Pada setiap perubahan
putaran mesin (2000 hingga 8000 rpm) dilakukan pencatatan
data yang meliputi torsi, waktu konsumsi bahan bakar tiap
25ml,serta data hasil uji emisi dari gas analyzer. Hasil setting
terbaik akan disimpan kedalam logfile engine control unit
Dari penelitian ini didapatkan durasi injeksi yang
optimal untuk mencapai AFR bioetanol E100 yaitu pada putaran
engine 2000 hingga 4000 rpm sebesar 200%, putaran 5000
hingga 6000 rpm sebesar 175%, serta putaran 7000 hingga 8000
rpm sebesar 150%. Pada kondisi rasio kompresi 12, 12,5, dan 13
yang diperlakukan dengan mapping ignition akan dibandingan
terhadap ignition standar pada tiap rasio kompresi. Pada CR=12
torsi naik rata-rata sebesar 1,733%, Sfc mengalami penurunan
rata-rata sebesar 0,6%, dan efisiensi thermal naik rata-rata
sebesar 0,28%. Pada CR=12,5 torsi naik rata-rata sebesar
2,22%, Sfc naik rata-rata sebesar 1,59%, dan efisiensi thermal
mengalami penurunan rata-rata 2,01%. Pada CR=13 torsi naik
rata-rata sebesar 4,05%, Sfc mengalami penurunan rata-rata
sebesar 8,01%, dan efisiensi thermal naik rata-rata sebesar
6,88%. Dari hasil emisi, kandungan CO dan HC mengalami
penurunan di setiap rasio kompresi, yaitu emisi CO pada CR 12,
12,5, dan 13 turun sebesar 21,96%, 27,633%, dan 37,23%. Emisi
HC pada CR 12, 12,5, 13 turun sebesar 1,84%, 1,34%, dan
2,08%
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Fuel quality gave such a massive effect on the engine
performance, it is linked with the development of bioethanol fuel
consumption in most common vehicles. therefore, there should be
an adjustment (setting), which aims to find differences as the
results came up of the performance and exhaust emissions from
the use of different properties fuel, indeed the development of
program inside the electronic control units are required so that
variation of the combustion of the control side the fuel injection
and ignition timing can be achieve. Hopefully, there are
significant increases as the results came out of the engine
performance.
The study begins with a modified ECU SUMI-IT as well
as the study of the literature on E100 bioethanol fuel. After that,
the injector tested to achieve the AFR reinjection bioethanol E100
with a percentage of 100, 125, 150, 175 and 200 percent by the
amount of the standard fuel injected. Then, the test being done
with the use Pertamax (bioethanol 0%) within the standard
conditions as a control category and the use of bioethanol E100
with various ignition timing as the test category taken the
variation of advance ignition timing between 10o, 14o, 18o, 22o
and 26o Before Top Dead Center at the same time when the
compression ratio had been changed to 12, 12.5, and 13. The
Waterbrake Dynamometer was used by the test of which the
opening butterfly valve fully opened (Fully Open Throttle) to obtain maximum power at any engine rpm, and engine speed was
setted by adjusting the size of the load, on any changes rev of the
engine (2000 to 8000 rpm) the data recorded including the torque
value, 25 ml of fuel consumption on each test, and also the
emission test data from the gas analyzer. The results of the best
settings will be saved into log file Engine Control Unit.
As the result from the test, the optimal duration of
injection achieved within the AFR E100 bioethanol engine speed
is at 2000 to 4000 rpm at 200%, round 5,000 to 6,000 rpm at
175% and 7000 up to 8000 rpm rotation of 150%. On the
condition of the compression ratio between 12, 12.5 and 13 were
treated with ignition mapping compared against the standard
ignition at each compression ratio. In CR = 12 torque rises on
average by 1.733%, sfc experienced deterioration in average by
0.6% and thermal efficiency rose an average 0.28%. on CR =
12.5, torque rises by an average of 2.22%, sfc rose an average of
1.59% and thermal efficiency has decreased an average of
2.01%. at CR = 13 torque rises by an average of 4:05%, sfc has
decreased by an average of 8:01% and thermal efficiency rose by
an average of 6.88%. From proceeds, the content of CO and HC
decreased each compression ratio, ie emissions of CO on CR 12,
12.5, and 13 fell by 21.96% 27.633%, and 37.23%. HC emissions
in CR 12, 12.5 and 13 fell by 1.84%, 1.34% and 2.08%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 621.437 Pam s |
| Uncontrolled Keywords: | Electronic Control Unit, Injection Control, Maximum Best Torque(MBT), Ignition Timing, Bioetanol E100 |
| Subjects: | 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: | EKO BUDI RAHARJO |
| Date Deposited: | 18 Jun 2020 02:28 |
| Last Modified: | 18 Jun 2020 02:28 |
| URI: | http://repository.its.ac.id/id/eprint/76177 |
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