Chapter 5 Fuel Carb Injection -PowerPoint Presentation

Sistem Bahan bakar Karburator Untuk Motor Bakar TorakDan bagaimana bekerjanya TangkiSistem Bahan Bakar Motor Bakar TorakExhaustInletTank CavityFiller CapFiller NeckEF1/2FUELFUEL LEVEL SENSORCOCKPIT FUEL GAUGESistem Bahan Bakar Motor Bakar Torak - TangkiSistem Bahan Bakar - TangkiEF1/2FUELEF1/2FUELTankSistem Bahan BakarCockpit GaugeEF1/2PumpExhaustInlet

One-way Inlet ValveOne-way Outlet ValveDiaphragmDriving CamPompa Diapragma Mekanikal

One-way Inlet ValveOne-way Outlet ValveSolenoid WindingsSwitch MechanismDiaphragmMagnetic PlatePompa Diapragma SolenoidFLOW OUT

SPUR GEARS

PUMP FLOW AND RESTRICTION TO FLOW IN CONTROLLER CAUSES PRESSURE TO INCREASE

Flow Controller

Pompa roda gigiAir FilterTankSistem Karburator Bahan bakarCockpit GaugeEF1/2PumpCarburettorExhaustInlet

Air and DirtClean AirFilter element corrugated breathable paperDirt trappedbyFilter elementBasic Air Filter OperationSaringan UdaraAir FilterTankSistem Karburator Bahan BakarCockpit GaugeEF1/2PumpCarburettorExhaustInletBagaimana karburator mengendalikan aliran bahan bakar pada mesin :RUANG PELAMPUNGHal ini dilakukan oleh: FLOAT CHAMBERNEEDLE VALVEAIR VENTVENTURIFUEL FEEDFUEL NOZZLESISTEM BAHAN BAKAR YANG DISEDERHANAKANFLOATFUEL LEVELAIR IS SUCKED THROUGH VENTURI BY..A PISTON MOVING DOWN ON INDUCTION STROKE SISTEM BAHAN BAKAR YANG DISEDERHANAKANMOVING AIR HAS LOWER PRESSUREFUEL FLOWAIR FLOWAIR FLOWTHE LOWER AIR PRESSURE PULLS FUEL THROUGH THE JET AIR/FUEL MIXTURE FLOWS TO ENGINEFUEL LEVEL DROPSPULLING AIR INTO FLOAT CHAMBER SISTEM BAHAN BAKAR YANG DISEDERHANAKANFUEL LEVEL DROPSFUEL LEVEL DROPPING LOWERS FLOATAND ALLOWS FUEL TO ENTER FLOAT CHAMBER FROM PUMP SISTEM BAHAN BAKAR YANG DISEDERHANAKANFUEL LEVEL DROPSFUEL LEVEL RISING FORCES THE NEEDLE VALVE CLOSEDFUEL LEVEL DROPPING LOWERS FLOATSISTEM BAHAN BAKAR YANG DISEDERHANAKANFUEL IS PULLED OUT OF THE FLOAT CHAMBERONLY WHEN ONE OF THE PISTONS IS ON THE INDUCTION STROKEFUEL LEVEL RISING FORCES THE NEEDLE VALVE CLOSEDBagaimana mengendalikan aliran campuran udara-bahan bakar ke dalam mesin :Pencekik (Throttle)Mengendalikan campuran udara bahan bakar berarti mengendalikan mesinBagian dari karburator yang mengendalikan aliran adalah .SISTEM BAHAN BAKAR YANG DISEDERHANAKAN

LINK TO THROTTLE LEVER/PEDALTHROTTLE VALVEVALVE SPINDLEVALVE DISCCARB.THROTTLE VALVEAIR FILTERENGINEVENTURIFUEL AND AIR IS MIXED DUE TO LOWERED AIR PRESSURECONTROLS MIXTURE FLOW TO ENGINEINLET MANIFOLDENGINE PULLS AIR IN DURING INDUCTION STROKEAND FLOW RESTRICTION THROUGH THROTTLE VALVECAUSED BY SUCTION FROM ENGINEBETWEEN THROTTLE VALVE AND ENGINE IS A PARTIAL VACUUMTHE INLET MANIFOLD VACUUM CAN BE USED TO HELP APPLY THE BRAKES CALLED POWER-ASSISTINGEXHAUSTMANIFOLDSISTEM BAHAN BAKAR YANG DISEDERHANAKANSISTEM BAHAN BAKAR YANG DISEDERHANAKANTHROTTLE VALVETHIS WOULD BE A HIGH THROTTLE SETTING OR FULL POWEROPEN THROTTLE ALLOWS VENTURI TO WORK AT MAXIMUM EFFICIENCYLOW THROTTLE SETTING - CALLED IDLE OR TICK-OVERALMOST CLOSED THROTTLE MEANS THE VENTURI DOES NOT WORK VERY WELLLOW AIR FLOW MEANS VERY LITTLE OR NO FUEL/AIR MIXING IN THE VENTURISO AN ALTERNATIVE AND EFFECTIVE VENTURI NEEDS TO BE FOUNDSISTEM BAHAN BAKAR YANG DISEDERHANAKANT CONTROLS FUEL FLOWSISTEM BAHAN BAKAR YANG DISEDERHANAKANLOW THROTTLE SETTING - CALLED IDLE OR TICK-OVEREDGE GAPS BECOME THE VENTURI FOR THE LOW AIR FLOWAT IDLE - SLOW RUNNING JET SISTEM BAHAN BAKAR YANG DISEDERHANAKANTHE AIR FILTER CAN ALSO CAUSE RESTRICTION TO AIR FLOWTHIS WOULD CREATE A PRESSURE DIFFERENCE BETWEEN:-HEREAND HEREAND THEREFORE A SLIGHT VACUUM BEFORE CARBFLOAT CHAMBER VENTSistem Injeksi Bahan Bakar

Sistem Injeksi Bahan Bakar

Menggunakan tekanan (bukan vakum) dari Pompa elektrik untuk menyemprot Bahan bakar ke dalam intake manifold.Memberikan mesin dengan rasio udara-bb yang tepat (14.7 : 1)Sistem Injeksi Bahan Bakar

Menggunakan tekanan (bukan vakum) dari Pompa elektrik untuk menyemprot Bahan bakar ke dalam intake manifold.Memberikan mesin dengan rasio udara-bb yang tepat (14.7 : 1)Sistem Injeksi Bahan BakarKeuntunganMemperbaiki atomisasi Aliran Bahan bakar yang lebih baik Lebih halus saat idel Memperbaiki ekonomi bahan bakarEmisi gas buang yang lebih rendahPengemudian lebih baik dalam cuaca yang dinginMeningkatkan daya mesinSederhana