PRINSIP KERJA KARBURATOR 1 Water (c) (a) (b) Air PT. INDOMOBIL NIAGA INTERNATIONAL 2W SERVICE TRAINING KARBURATOR ADVANCE.

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

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VENTURI 3

Flow of air quickens and pressure drops

Fuel-airmixture

Air

Atmosphere

Gasoline

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CAMPURAN UDARA DANBAHAN BAKAR 4

Fuel-airmixture

Throttle valve

Cable

Air

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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 (%)

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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

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2W SERVICE TRAINING

KARBURATOR ADVANCE

JENIS KARBURATOR 7

1. BERDASARKAN ARAH ALIRAN

Horizontal draft type

Down draft type

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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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JENIS KARBURATOR 9

3. BERDASARKAN JUMLAH SALURAN

Single barrels Double barrels

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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

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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

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PILOT SYSTEM 13

1. TIPE LUBANG TUNGGAL

Throttle valve

Pilot air screw

Pilot jet

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PILOT SYSTEM 14

2. TIPE LUBANG GANDA

Bypass

Pilot outlet

Pilot jet

( 1 )

Pilot jet

Pilot outlet

Bypass

( 2 )

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MAIN SYSTEM 15

Jet needle

Main air jet

Main jet

Needle jet

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MAIN SYSTEM16

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MAIN SYSTEM17

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TIPE MAIN JET 18PT. INDOMOBIL NIAGA INTERNATIONAL

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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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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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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

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PEMERIKSAAN DAN PENYETELANVM TYPE 23

CalipersLean

Rich Needle clip

1 st stage

2 st stage

3 st stage

4 st stage

5 st stage

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KARBURATOR ADVANCE

KARBURATOR GSX 25024

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KARBURATOR FD 110 XCD25

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