1. ROTARY PUMP
INTRODUCTION :
THE ROTARY SYSTEM IS FOUND ON SMALL
TO MEDIUM SIZE DIESEL ENGINE AND IS
OFTEN REFERED TO AS ROTARY PUMP
BECAUSE ITS CONCEPT OF OPERATION IS
SIMILAR TO THAT OF THE IGNITION
DISTRIBUTOR FOUND ON GASOLINE
ENGINE. A ROTATING MEMBER CALLED A
ROTOR WITHIN THE PUMP DISTRIBUTES
FUEL AT HIGH PRESSURE TO THE
INDIVIDUAL INJECTORS. IN ENGINE FIRING
ORDER SEQUENCE. IT IS CLASSIFIED AS A
HIGH PRESSURE FUEL SYSTEM
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2. MAIN COMPONENT OF
ROTARY PUMP
 VALVE AND TRANSFER TYPE PUMP
 TRANSFER PUMP AND LINER
 TRANSFER PUMP AND BLADE
 SOLENOID ASSY
 METERING VALVE
 MAIN ROTOR
 EXCESSIVE FUEL MECHANISM
 CAM RING
 FUEL ADJUSTMENT PLATE SCREW
 SHOE ROLLER ASSY
 PUMPING PISTEN PLUNGER
 GOVERNOR WEIGHT
 TRANSFER PRESSURE (PRV)
 DELIVERY VALVE HOLDER
 L.L.A.
 E.F.D.
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3. ADVANTAGE OF ROTARY PUMP
 LOW FUEL CONSUMPTION
 LOW TOXIC EMISSION
 MEET EURO II NORMS
 EASY ADAPTABILITY TO A VARIETY
OF ENGINE
 REQUIREMENT
 ADAPTABILITY TO ADD – ON
MODULES
 HIGH INJECTION PRESSURE
 HIGH POWER TO WEIGHT RATIO
 LESS NOISE LEVEL
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4. DISADVANTAGE
 HIGH INITIAL COAST
 SKILL REQUIRED FOR
OVERHAUL
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5. APPLICATION OF ROTARY PUMP
NOW A DAYS MOSTLY ALL HIGH
SPEED LIGHT AND MEDIUM DIESEL
VEHICLES USING ROTARY PUMP.
• MAHINDRA & MAHINDRA 550XD
• ARMADA
• TATA SUMO
• TOYOTA QUALIS
• LIGHT COMMERCIAL VEHICLES
• 2.5 TON
• ALS
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6. DIFFERENCE BETWEEN INLINE
AND ROTARY PUMP
INLINE PUMP
 INDIVIDUAL INJECTION PART
 LUBRICATION REQUIRED
 WEIGHT MORE
 COST OF REPAIR LESS
 CALIBRATION TIME MORE
 POLLUTION MORE DIFFICULT TO
ACHIEVE EURO.NORMS ENGINE.
 SPREAD MASTER PUMP 1000 RPM
500 STROKE 25 CC + 0.5CC
 BARRELL AND PLUNGER GAP 10 TO
12 MICRON 1/1000 MM OR WORKING
CLEARENCE.
ROTARY PUMP
 SINGLE INJECTION DISTRIBUTOR
TYPE PART
 SELF LUBRICATED BY USED DIESEL
ENGINE
 LESS IN WEIGHT / COMPACT
 COST OF REPAIR MORE
 CALIBRATION TIME LESS
 LESS POLLUTION ACHIEVE ABLE IN
EURO.NORMS ENGINE.
 SPREAD MASTER PUMP 1000 RPM
25 CC + 0.2 CC IN 500 STROKE.
 HEAD AND ROTOR CLEARENCE 3
TO 4 MICRONS.
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7. DIFFERENCE BETWEEN INLINE
AND ROTARY PUMP
INLINE PUMP
 INDIVIDUAL INJECTION PART
 LUBRICATION REQUIRED
 WEIGHT MORE
 COST OF REPAIR LESS
 CALIBRATION TIME MORE
 POLLUTION MORE DIFFICULT TO
ACHIEVE EURO.NORMS ENGINE.
 SPREAD MASTER PUMP 1000 RPM
500 STROKE 25 CC + 0.5CC
 BARRELL AND PLUNGER GAP 10 TO
12 MICRON 1/1000 MM OR WORKING
CLEARENCE.
ROTARY PUMP
 SINGLE INJECTION DISTRIBUTOR
TYPE PART
 SELF LUBRICATED BY USED DIESEL
ENGINE
 LESS IN WEIGHT / COMPACT
 COST OF REPAIR MORE
 CALIBRATION TIME LESS
 LESS POLLUTION ACHIEVE ABLE IN
EURO.NORMS ENGINE.
 SPREAD MASTER PUMP 1000 RPM
25 CC + 0.2 CC IN 500 STROKE.
 HEAD AND ROTOR CLEARENCE 3
TO 4 MICRONS.
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