LAPORAN PRAKTIKUM MESIN KONVERSI ENERGI
DI SUSUN OLEH :
NAMA : SURIYADI ANWAR NIM
: 10212010020
PROGRAM STUDI TEKNIK MESIN FAKULTAS TEKNIK UNIVERSITAS ANTAKUSUMA PANGKALAN BUN 2013
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UNIVERSITAS ANTAKUSUMA (UNTAMA)
KEP. MENDIKNAS RI. NO. 57/D/O/2008 Kampus : Jl. Iskandar No.63, Telp. 0532-22287 Kode pos. 74112 Pangkalan Bun
LEMBAR PENGESAHAN LAPORAN PRAKTIKUM KONVERSI ENERGI NAMA
:
Suriyadi Anwar
NIM
:
10212010020
Pangkalan Bun, 30 Juni 2013 Dosen Pengampu
Novan Harfiansyah, S.Pd NIDN.
Mengetahui Ketua Prodi Teknik Mesin,
M. Arif Haryadi, ST NIDN. 1126068403
-
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KATA PENGANTAR
Saya panjatkan puji syukur atas kehadirat Tuhan Yang Maha Esa, karena atas berkat rahmat dan hidayahnya saya dapat menyelesaikan Laporan Praktikum Konversi Energi ini dengan lancar. Laporan ini selain saya hadirkan untuk memenuhi tugas kuliah juga untuk membuat kita dapat memahami bagaimana cara Tune Up Mobil Injeksi maupun Non Injeksi. Dalam penulisan laporan yang saya susun ini mungkin masih banyak kekurangan-kekurangan baik dari teknis penulisan maupun materi yang kuarang tepat mengingat dari kemampuan yang saya miliki. Dengan selesainya laporan kerja praktek ini tidak terlepas dari bantuan banyak pihak yang telah memberikan masukan-masukan kepada penulis. Untuk itu saya mengucapkan banyak terimakasih kepada Dosen-dosen pembimbing saya.
1. Novan Harfiansyah, S.Pd 2. Heru Prabowo, S.PdT
Pangkalan Bun,30 Juni 2013
Penyusun
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DAFTAR ISI
HALAMAN JUDUL............................................ .................................................................. ............................................ ......................
i
LEMBAR PENGESAHAN ............................................ .................................................................. ................................. ...........
ii
KATA PENGANTAR ............................................ ................................................................... ......................................... ..................
iii
DAFTAR ISI ............................................. ................................................................... ............................................ ................................. ...........
iv
BAB I ............................................ .................................................................. ............................................ ............................................ ......................
1
A. Pendahuluan .......................................... ................................................................. ............................................. ............................. .......
1
B. Latar Belakang Masalah ........................................... ................................................................. ................................. ...........
1
C. Tujuan ............................................. ................................................................... ............................................ ..................................... ...............
2
D. Tempat Praktikum ............................................ ................................................................... ......................................... ..................
2
BAB II DASAR TEORI .......................................... ................................................................ ........................................ ..................
3
A. Pendahuluan .......................................... ................................................................. ............................................. ............................. .......
3
B. Efi Dan Karburator ...........................................................................................
4
C. Pembahasan .......................................... ................................................................. ............................................. ............................. .......
5
1.Komponen-komponen 1.Komponen-komponen Efi Mobil Toyota Soluna........................ ........................
5
D. Skema Bahan Bakar (Fuel Sistem) ........................................... .......................................................... ...............
11
E. Cara Tune Up Mesin Efi Toyota Soluna ............................................ ................................................... .......
12
1.Air cleaner (AC) atau air box .......................................... ..................................................... ...........
12
2.Koil dan kabel tegangan ........................................... ............................................................. ..................
12
3.Busi ............................................ .................................................................. ............................................ .......................... ....
12
4.Trottole body dan idle speed sensor (ISC) ................................ ................................
13
5.Fuel filter (FF) .......................................... ................................................................ ................................. ...........
13
6.Oil (Pelumas) ............................................ .................................................................. ................................. ...........
13
7.Uji diagnostic link connector .......................................... ..................................................... ...........
14
8.Restard ........................................... ................................................................. ............................................ ......................
14
BAB III TUNE UP ........................................... ................................................................. ............................................ .......................... ....
15
A. Pembahasan ........................................... .................................................................. ............................................. ............................. .......
15
1.Alat dan bahan perlengkapan tune up mobil sistem efi .............
15
2.Alat dan bahan perlengkapan tune up mobil sistem karburator .
15
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C. Urutan Kerja Tune Up Mesin Kijang ............................................ ....................................................... ...........
19
1.Pemeriksaan pada saat mesin mati ............................................ ............................................
19
2.Pemeriksaan setelah mesin hidup/panas .................................... ....................................
23
3.Langkah akhir ........................................... ................................................................. ................................. ...........
24
4.Lampiran ........................................... ................................................................. ........................................ ..................
24
5.Kesimpulan.................................................................................
26
BAB IV PENUTUP ............................................ .................................................................. ............................................ ......................
27
A. Kesimpulan Akhir ........................................... .................................................................. ......................................... ..................
27
B. Saran
.......................................... ................................................................ ............................................ ..................................... ...............
27
C. Motto
................................... ......................................................... ............................................ ............................................ ......................
27
D. Photo Praktikum ........................................... ................................................................. ............................................ ......................
28
DAFTAR PUSTAKA ............................................ ................................................................... ......................................... ..................
29
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BAB 1
A. Pendahuluan
Energi merupakan sesuatu pengertian yang ti dak mudah didefinisikan dengan singkat dan tepat. Energi yang bersifat abstrak yang sukar dibuktikan, tetapi dapat dirasakan adanya. Energi atau yang sering disebut tenaga, adalah suatu pengertian yang sering sekali digunakan orang. Kita sering mendengar mendengar istilah krisis energi yang bermakna untuk menunjukkan krisis bahan bakar (terutama minyak). Bahan bakar adalah sesuatu yang menyimpan energi, jika dibakar akan diperoleh energi panas yang berguna untuk alat pemanas atau untuk menggerakkan mesin. Energi dalam kehidupan sehari-hari arti gerak, misal seorang anak banyak bergerak dan berlari-lari dikatakan penuh dengan energi. Energi juga dihubungkan dengan kerja. Seseorang yang mampu bekerja keras dikatakan mempunyai energi atau tenaga besar. Jadi boleh dikatakan energi adalah sesuatu kekuatan yang dapat menghasilkan gerak, tenaga, dan kerja.
B. Latar Belakang Masalah
Energi dalam pengetahuan teknologi dan fisika dapat diartikan sebagai kemampuan melakukan kerja. Energi di dalam alam adalah suatu besaran yang kekal (hukum termodinamika pertama). Energi tidak dapat diciptakan dan tidak dapat dimusnahkan, tetapi dapat dikonversikan/berubah dari bentuk energi yang satu ke bentuk energi yang lain, misalnya pada kompor di dapur, energi yang tersimpan dalam minyak tanah diubah menjadi api. Selanjutnya jika api digunakan untuk memanaskan air dalam panci, energi berubah bentuk lagi menjadi gerak molekul-molekul air. Perubahan bentuk energi ini disebut konversi. Sedangkan perpindahan energi disebabkan adanya perbedaan temperatur yang disebut kalor. Energi juga dapat dipindahkan dari suatu sistem ke sistem yang lain melalui gaya yang mengakibatkan pergeseran posisi benda. Transfer energi ini adalah kemampuan suatu sistem untuk menghasilkan suatu kerja yang pengaruh/berguna bagi kebutuhan manusia secara positif. Jadi energi adalah suatu kuantitas yang kekal, dapat berubah bentuk, dan dapat pindah dari satu sistem ke sistem yang lain, akan tetapi jumlah keseluruhannya keseluruhannya adalah tetap.
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C. Tujuan.
Tujuan Praktikum Yaitu Melakukan Tune Up Motor Bakar Sistem Efi Dan Konvensional : 1. Praktikan dapat mengetahui proses tune up. 2. Praktikan dapat mengetahui perbedaan “Mobil Bensin Kijang 4K Konvensional” dan “Mobil Toyota Soluna Sistem bahan bakar Efi. 3. Untuk pengontrolan kondisi mesin kendaraan setelah digunakan untuk 10.000 kilometer.Untuk memeriksa, menyetel dan mengembalikan kondisi motor dari kendaraan ke keadaan semula.
D. Tempat Praktikum
Praktikum mesin konversi energi ini di laksanakan tanggal 14 sampai 15 juni 2013 tepat berlangsung di Jln. HM Rafi’i, laboratorium SMK Putra Pangkalan Bun.
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BAB II DASAR TEORI
A. PENDAHULUAN
une-up une-up berarti penyetelan. Pada kendaraan bermotor tune-up bermakna T penyetelan kembali mesin kendaraan agar dapat kembali atau mendekati mendekati kondisi kerja optimum. Seperti yang sudah pernah kita singgung di tulisan sebelumnya bahwa di dalam mesin banyak sekali komponen mesin yang bergerak. Gerakangerakan komponen kendaraan dalam kurun waktu tertentu akan menyebabkan komponen-komponen komponen-komponen tersebut berubah setelannya.
Langkah-langkah yang dilakukan kurang lebih sama antara mesin bensin dan mesin diesel. Untuk mesin bensin, pada mesin konvensional langkah-langkah yang dilakukan antara lain: 1) Penyetelan kembali sistem pengapian. Pada kendaraan yang masih menggunakan menggunakan platina dan kondensor sebagai penghantar arus listrik dari koil ke busi, kondisi platina dan kondensor akan diperiksa, apabila sudah terjadi keausan, maka platina dan kondensornya akan diganti. Selanjutnya adalah pengecekan pengecekan kondisi busi, apabila busi sudah berwarna berwarna hitam pada bagian bawah elektrodanya, elektrodanya, dan elektrodanya elektrodanya sudah aus, maka busi harus diganti. Semua busi sebaiknya dilakukan penggantian agar kondisi pengapian tidak pincang. Setelah busi diganti, dilanjutkan dengan pengaturan derajat pengapian sesuai dengan standarnya dengan cara memutar distributor (montir kerap menyebutnya dengan delko) dengan bantuan timing light sebagai indikatornya. Apabila kendaraan kita menggunakan sistem CDI sebagai penghantar arusnya, langkah yang dilakukan cukup dengan
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permukaan permukaan bagian dalam dari throttle body akan disemprot dengan injector cleaner.
Selain penyetelan dan pembersihan tadi, sebaiknya saat tune-up juga dibarengi denganpenggantian oli kendaraan. Oli mesin idealnya diganti secara berkala, yang intervalnya bergantung pada jenis oli yang dipakai. Saat ini rata-rata oli sintetis maupun semi sintetis menganjurkan penggantian oli setiap 5000 km hingga 10000 km. Untuk oli transmisi dan gardan (untuk kendaraan berpenggerak roda belakang) sebaiknya diganti mengikuti anjuran dari pabrikan oli masing-masing, namun ratarata penggantian penggantian oli transmisi dan gardan berlaku pada interval 10000 km. Sebagai tambahan, untuk mesin kendaraan yang menggunakan timing belt, ada baiknya memeriksa memeriksa kondisi dari timing beltnya. Sebagai Sebagai acuan umur pakai timing belt, bisa berpatokan pada informasi yang terdapat pada buku pedoman pemilik kendaraan/owners manual book. Ada kendaraan yang mensyaratkan penggantian timing belt setiap 20000 km, 40000 km bahkan 100000 km.
B. EFI DAN KARBURATOR EFI adalah sebuah kata dari El ektroni k Fuel I njektion . Adapun pengeritan dari EFI adalah sebuah sistem penyemprotan bahan bakar di Intake yang dalam kerjanya
di kontrol secara elektronik agar didapatkan nilai campuran udara dan bahan bakar selalu sesuai dengan kebutuhan motor bakar, sehingga dapat menghasilkan daya motor yang optimal dan mempunyai mempunyai gas buang yang ramah lingkungan dibandingkan karburator. Sedangkan Karburator perbedaannya perbedaannya dengan Efi adalah terletak pada caranya mengatur
pasokan
bahan
bakar
(bensin)
ke
dalam
mesin.
Perangkat karburator konvensional melakukan tugasnya sesuai dengan ukuran
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a)
ECU – Electrical Control Unit
Gambar 2.1 ECU
Pusat
pengolah
masukkan/input
dari
data
kondisi
sensor-sensor
penggunaan mengolahnya
mesin,
mendapat
kemudian
memberi
keluaran/output untuk saat dan jumlah injeksi, saat pengapian.
b)
Fuel Pump
Gamabar Gamabar 2.2 Fu el Pum p
Menghasilkan tekanan BBM yang siap diinjeksikan. dii njeksikan.
c)
Pressure Regulator
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d)
Temperature Sensor
Gambar 2.4 Temperatu Temperatu r sensor sensor
Memberi masukan ke ECU kondisi suhu mesin, kondisi mesin dingin membutuhkan membutuhkan BBM lebih banyak.
e)
Inlet Air Temperature Sensor
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f)
Inlet Air Pressure Sensor
Gambar 2.6 I nl et air pr ess essur e sens sensor or
Memberi masukan ke ECU kondisi tekanan udara yang akan masuk ke mesin, udara bertekanan O2 lebih padat, membutuhkan membutuhkan BBM lebih banyak.
g)
Atmospheric Pressure Sensor
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h)
Camshaft Sensor
Gambar 2.8 Camshaft sensor sensor
Memberi masukan ke ECU posisi langkah mesin, hanya langkah hisap yang membutuhkan buka INJECTOR.
i)
Throttle Sensor
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j)
Fuel Injector / Injector
Gambar 2.10 I njector njector
Gerbang akhir dari BBM yang bertekanan, fungsi utama menyemprotkan BBM ke dalam mesin, membuka dan menutup berdasarkan perintah dari ECU.
k)
Speed Sensor
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l)
Vehicle-down Sensor
Gambar 2.12 Vehi cle-down sensor sensor
Memberi masukan ke ECU kondisi mobil, jika mobil terguling dengan kondisi mesin hidup maka ECU akan menghentikan kerja FUEL PUMP, IGNITION, INJECTOR, untuk keamanan dan keselamatan.
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D. Skema Bahan Bakar (Fuel System)
Gambar 2.14 Skema bahan bakar sistem efi efi
E. Cara Tune Up Engine EFI Toyota Soluna Adapun komponen-komponen yang di tune up dalam mesin EFI (Electronic fuel injection) yaitu sebagai berikut :
1. Air Cleaner(AC) atau air box
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3. Busi
Gambar 2.15 Bu si
Biasanya pada busi tidak hanya di bersihkan tetapi juga bisa di ganti dengan yang baru tergantung kepada keadaan busi masih bagus atau tidak. Namun biasanya bi asanya penggantain busi sering dilakukan pada KM 20.000. jadi jika keaadaan busi masih bagus bersihkan busi menggunakan hamplas atau sikat
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Agar mesin tetap nyaman dan tidak cepat aus maka penggantian oli ini harus dilkukan secara berkala. Sehingga kstbilan dan suhu pada ruang pembakaran pembaka ran tetap terjaga. terjaga.
7. Uji Diagnostic Link Connector
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BAB III TUNE UP
A.
PEMBAHASAN.
1. ALAT DAN BAHAN PERLENGKAPAN TUNE UP MOBIL SISTEM EFI Siapkan alat-alat yang akan dipakai untuk tune up dan cek peralatan
tersebut, alat yang di gunakan diantaranya sebagai berikut :
1) Kunci 10 dan Kunci 14. 2) Kunci busy, hmplas dan sikat kawat. 3) Feeler gauge. 4) Obeng ketok dan lap bersih. 5) Carburraator Cleaner (CC). 6) Multimetrer.
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2) Kunci ring 12, 14, dan 19 .
Gambar Gambar 3.2 Kunci r ing pas
3) Kunci pas 12 dan 14.
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6) Dweel tacho meter.
Gambar 3.6 Dweel Dweel tacho meter meter
7) Timing light.
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9) Compression tester.
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12) Amplas.
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2) Periksa kuwalitas minyak pelumas/oli apabila sudah kental atau kotor /hitam pekat, maka gantilah oli mesin dengan oli mesin yang merek dan type sama. 3) Periksa kebocoran oli mesin lakukan pemeriksaan di bagin bawah mesin, dari kemungkinan oli mesin bocor, terutama di bagian oli seal depan, oli seal belakang dan karter mesin. 4) Periksa kerja pompa oli hidupkan mesin periksa lampu oli di panel
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f ) Pemer Pemer i ksaan System System Pengapian M esi esi n
Pemeriksaan busi lakukan pemeriksaan kondisi busi, celah busi(gap busi) dan bersihkan. Warna busi kan menunjukan kwalitas hasil pembakaran apabila busi berwaena kecoklat coklatan itu berarti pembakaran sempurna, apabila kehitam-hitaman kehitam-hitaman dan kering, berarti kebanyakan bahan bakar.
g) Pemeriksaan busi
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4)
Periksa dan bersihkan karburator, buka dari mesin dan overhaul dan bersihkan serta stel pelampung. pelampung. Untuk mesin injeksi buka injector dan bersihkan dengan dengan injector cleaner cleaner sampai sampai benar benar-bersih. benar-bersih.
i ) Pemeri Pemeri ksaan ksaan dan Penyetelan Penyetelan Celah k atup
1) Buka tutup selinder mesin. 2) Putar poros engkol sampai tanda pada pully menghadap pada tanda O
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