yanmar mechnical pump

8/3/2019 Yanmar Mechnical Pump

1/16

Strictly confidential | Department | 04/18/2005 | Filing note | Robert Bosch GmbH reserves all rights even in the event of industrial property

rights. We reserve all rights of disposal such as copying and passing on to third parties.

RBSI/ASA

EP-1 Diesel Fuel Injection Pump

A- type Fuel Injection Pump

1. Valve holder

2. Delivery valve

3. Pump barrel

4. Pump plunger

5. Control rack

6. Control sleeve

7. Plunger return

8. Spring seat

9. Roller tappet

10. Camshaft


2/16



RBSI/ASA


Plunger Operation

Zero Delivery Partial Delivery Maximum Delivery

1. Plunger Helix

2. Upper and LowerHelix

3. Starting Groove

4. Leakage return slot


3/16



RBSI/ASA


Plunger PhasesBDC Prestroke Retraction

LiftResidStrok

EffectiveStroke

Fuel Intake Delivery Fu

DischStart of DeliveryEnd of intake

End of Delivery


4/16



RBSI/ASA


Delivery Valve

1. Delivery valve holder

2. Delivery valve spring

3. Delivery valve

4. Valve seat

5. Valve holder

What is the purpose of the delivery valves ?

1. To interrupt the high pressure circuit between fuel injection lines and p

2. To relieve pressure lines and nozzle space which causes the nozzle to c

thus preventing undesirable fuel dribble.

What is the purpose of the retraction piston ?

To separate the pipe line against element chamber,maintaining certain volume depending on the length of pipe.


5/16



RBSI/ASA


RDV Valve

What is the purpose of the RDV valve ?

1. Faster peak pressure and filling of high pressure pipe,opened through bore.

2. Maintains feed pressure of 3-3.5 bar in the element chamber andpipes when engine is not running.


6/16



RBSI/ASA


GDV Constant Pressure Valve

When are these constant pressure valves used ?

For high pressure fuel injPressures above 800 bar What are the advantages for this type of valves ?

It avoids cavitation in theImproves hydraulic stabil


7/16



RBSI/ASA


P Type PumpHow long is the plunger stroke ?

10 mm

How high is the peak injection

Pressure ? Delivery valve

Fuel gallery

Plunger barrel

Plunger return spring

Roller tappet

Camshaft

Cam lobe

Prestroke discs beneath the barrel and valve assembly

Approximately 800 bars

Control rodHow is the injection pump lubricated ?

Control sleeveFrom the engine lubrication system

How far does the control rod travel ?

Approximately 21 mm

Where are these pumps fitted ?

Commercial vehicles, stationary

engines

How is the prestroke adjusted ?


8/16



RBSI/ASA


MW Type Pump

Delivery valve holder

Filler piece

Delivery valve springPlunger flange assy

Delivery valve

Inlet bore

Plunger helix

Upper spring seat

Control sleeve

PlungerPlunger return spring

Lower spring seat

Roller tappet


9/16



RBSI/ASA


A Type Pump

1. Delivery Valve

2. Pump barrel

3. Pump Plunger

4. Control rack

5. Control sleeve

6. Plunger returnspring

7. Adjusting screw

8. Roller tappet

9. Camshaft

10. Cam lobe

How lon

8 mm

How higpressureApproxi

How is the

From the

How far do

Approxim

Where are

Commerc

engines

How is th

At the tap


10/16

SHIN DAE-A ENGINEERING


11/16



12/16



13/16



14/16



15/16



16/16


** .

YANMAR 6RAL, NIIGATA 6L16XC (Coupling)

.

- ENGINE 2CYCLE, 4CYCLE , 4CYCLE ENGINE INJECTION

PUMP .

.

( ) PUMP TEST . ,

.

( ! TEST .)

ENGINE , 6 , 8 ( PUMP )

1 - 5 - 3 - 6 - 2 - 4 1 - 4 - 2 - 6 - 3 - 5, 1 - 3 - 5 - 6 - 4 - 2,

1 - 2 - 7 - 3 - 4 - 5 - 6 - 8 1 - 8 - 4 - 3 - 6 - 5 - 7 - 2 ~ .

1 6, 8 (FLYWHEEL ) 1

1

1 , (4CYCLE

- 1 - 5 - 3 - 6 - 2 - 4 , 1, 5, 3 / 6, 2, 4 1 6

, 6 (CYLINDER) (ROCKER ARM)

)

INJECTION 1 .( .)

. (FUEL TIMING).

, (Main plate), , .

) YANMAR 6RAL -18 ~ 20, NIIGATA 6L16XC -19 ~ 21 .

FLYWHEEL , ( PLUNGER

.) .

,

.

yanmar mechnical pump

Documents