PRINSIP KERJA KARBURATOR 1
Water
(c)
(a)
(b)
Air
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
FUNGSI KARBURATOR 2
MERUBAH BENSIN MENJADI PARTIKEL – PARTIKEL BERCAMPUR DENGAN UDARA SEHINGGA MUDAH DI SEMBURKAN
MENGATUR PERBANDINGAN CAMPURAN UDARA DAN BAHAN BAKAR
MENGATUR JUMLAH CAMPURAN UDARA DAN BAHAN BAKAR YANG MASUK KE MESIN
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
VENTURI 3
Flow of air quickens and pressure drops
Fuel-airmixture
Air
Atmosphere
Gasoline
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
CAMPURAN UDARA DANBAHAN BAKAR 4
Fuel-airmixture
Throttle valve
Cable
Air
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
PERBANDINGAN UDARA – B. BAKAR
VS BUKAAN THROTTLE VALVE
5
10 : 1
14 : 1
18 : 1 Theoretical mixture ratio
Mix
ture
rati
o
20
60 80 10040
Output mixture ratio
Degree to which throttle valve is open (%)
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
PERBANDINGAN UDARA – B. BAKAR
6
Air
Gasoline
22 g : 1 gLean boundary limit
Air
Gasoline
15 g : 1 gEconomicalmixture ratio
Air
Gasoline
13 g : 1 gMaximum outputmixture ratio
Air
Gasoline
12,8 g : 1 gRich boundary limit
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
JENIS KARBURATOR 7
1. BERDASARKAN ARAH ALIRAN
Horizontal draft type
Down draft type
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2W SERVICE TRAINING
KARBURATOR ADVANCE
JENIS KARBURATOR 8
2. BERDASARKAN SISTEM TUAS KATUP
Opens
Closes
Throttle valve
Piston – type throttle valve
Opens
Closes
Throttle valve
Butterfly – type throttle valve
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2W SERVICE TRAINING
KARBURATOR ADVANCE
JENIS KARBURATOR 9
3. BERDASARKAN JUMLAH SALURAN
Single barrels Double barrels
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
KONSTRUKSI KARBURATOR 10
Air at idling low output
Fuel at idling low output
Fuel air mixture at idling low output
Air at medium and high speeds
Fuel at medium and high speeds
Fuel-air mixture at medium and high speeds
Jet needle
Throttle valve
Pilot outlet
Pilot air screw
Pilot jet
Main jet
Throttle stop screw
Throttle stop screw spring
Needle jet
Main air
Pilot airBleed air
Air jet
Needle valve
Float
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SISTEM CHOKE 11
Starter plunger
Secondary air
Air bleed hole(primary airIntake port)
Starter jet
Starter pipe
Fuel injectionport
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
Air Fuel-air mixture
Fuel
Starter plunger needle
Starter plunger
Starter plunger holder
PTC heaterTo flywhell magneto
Termowax
Spring
SISTEM CHOKE 12
Starter plunger needle
Starter plunger
Starter plunger
Starter plunger needle
Air
Fuel
CHOKE OTOMATIS
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
PILOT SYSTEM 13
1. TIPE LUBANG TUNGGAL
Throttle valve
Pilot air screw
Pilot jet
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
PILOT SYSTEM 14
2. TIPE LUBANG GANDA
Bypass
Pilot outlet
Pilot jet
( 1 )
Pilot jet
Pilot outlet
Bypass
( 2 )
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
MAIN SYSTEM 15
Jet needle
Main air jet
Main jet
Needle jet
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
POSISI KATUP GAS 19
ThrottlepositionActive system
0 ~ 1/8 1/8 ~ 1/4Pilot system Pilot system
Main system
1/4 ~ 3/4Main system
3/4 ~ fully openMain system
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2W SERVICE TRAINING
KARBURATOR ADVANCE
TINGKAT KERJA KARBURATOR 20
Air screw & pilot jet
Throttle Valve Cut Away
Jet Needle
Needle Jet
Main Jet
Air Jet
Primary Choke
Komp.Karburator
GasBuka
TutupPenuh
BukaPenuh1/8 1/4 1/2 3/4
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2W SERVICE TRAINING
KARBURATOR ADVANCE
PEMERIKSAAN DAN PENYETELAN 21
Air gun
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PEMERIKSAAN DAN PENYETELANVM TYPE 22
Air screw
Throttle stop screw
Point at which speed begins to rise
Set air screw to halfway point
Point at whichSpeed rises
Air screwreturn amount
00 ½ 1½ 2½
Rota
tion s
peed
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
PEMERIKSAAN DAN PENYETELANVM TYPE 23
CalipersLean
Rich Needle clip
1 st stage
2 st stage
3 st stage
4 st stage
5 st stage
PT. INDOMOBIL NIAGA INTERNATIONAL
2W SERVICE TRAINING
KARBURATOR ADVANCE
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