MAN Diesel PrimeServ Academy Fuel Oil System
Fuel Oil Pressure Booster
Fuel Oil Pressure Booster
Fuel Oil Injection working principle
Fuel Oil Injection working principle
Fuel Oil Booster Pipe Connections
Fuel Oil Pressure Booster, K98ME
Fuel Oil Pressure Booster, S50ME-C
FIVA Valve Position Control
Supervision of FIVA Feedback Signal & Plunger Position
Fuel Index Adjustment
Adjustment of Maximum Pressure
Suction Valve, K98ME
Fuel Oil Pressure Booster Technical Data, K98ME
3.63M
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MAN Diesel PrimeServ Academy Fuel Oil System

1. MAN Diesel PrimeServ Academy Fuel Oil System

ME ME
Engine
control
system
- Fuel system
(Jan 2008)
Engine
control
system
- Fuel System
(July 2009)
© MAN Diesel
2009/07/01
<1>

2.

Fuel Oil System
1) Fuel oil pressure
booster
2) Adjustments
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<2>

3. Fuel Oil Pressure Booster

S50MC-C
S50ME-C
Suction Valve
Fuel Plunger
Fuel Oil inlet
pressure 7 - 8 bar
Hydraulic Actuator
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<3>

4. Fuel Oil Pressure Booster

ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<4>

5.

Fuel Oil System
High pressure pipe
Slide fuel
valve
Suction valve
Fuel oil inlet
7-8 bar
Hydraulic
piston
Accumulator
FIVA valve
To
drain
High pressure
hydraulic oil – inlet
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01

6. Fuel Oil Injection working principle

FIVA
Valve
Unpressurised fuel oil
Pressurised fuel oil
Unpressurised hydraulic oil
Pressurised hydraulic oil
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<6>

7. Fuel Oil Injection working principle

FIVA
Valve
Unpressurised fuel oil
Pressurised fuel oil
Unpressurised hydraulic oil
Pressurised hydraulic oil
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<7>

8. Fuel Oil Booster Pipe Connections

To lub oil drain
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<8>

9. Fuel Oil Pressure Booster, K98ME

ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
<9>

10. Fuel Oil Pressure Booster, S50ME-C

ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
< 10 >

11. FIVA Valve Position Control

FIVA Valve
CCU
Ch. 31
2
MPC
1
Requested
position (table)
synchronized to
crank shaft
position
÷
+
Signal
converter
4-20 mA
Ch. 30
Fuel ± 9 V Current
amplifier
control
±9A
Slide pos.[mm]
+6,3
0
-7
Exhaust valve opening
Injection
C.A.
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
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12. Supervision of FIVA Feedback Signal & Plunger Position

Supervision of FIVA Feedback Signal &
Plunger Position
The FIVA is immediately set to exhaust valve open position: (Safe position) if:
1
The FIVA valve feed back signal is not valid, i.e. outside 4-20 mA
The FIVA valve feed back signal indicates a too high (not physical possible)
speed
The FIVA valve feed back signal indicates a position not allowed outside a
window around TDC
2
The fuel booster position feed back signal indicates that the fuel booster is
moving during the compression stroke.
Reset by resetting CCU in question, or invalid / valid these 2 inputs Ch. 30 & 31
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
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13.

Feed Back Supervision
Injection start
angle trig
Injection preparation
Injection
TDC
Injection control
2
Fuel booster position
supervision
1
FIVA valve feed-back
signal supervision
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
< 13 >

14. Fuel Index Adjustment

Index offset at 100 % load
Index offset at 0 % load
Individual Chief limiter
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
< 14 >

15. Adjustment of Maximum Pressure

Timing of fuel injection
(corresponding to VIT adjustment on the MC
engine)
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
< 15 >

16. Suction Valve, K98ME

ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
< 16 >

17. Fuel Oil Pressure Booster Technical Data, K98ME

• Hydraulic pressure mounting:
2200 bar
• Hydraulic pressure dismantling:
2000 – 2400 bar
• Booster housing, weight:
260 kg
• Booster complete, weight:
700 kg
• Hydraulic plunger, weight:
70 kg
• Fuel plunger weight:
35 kg
• Top cover, weight:
260 kg
• Suction valve, tightening torque:
1165 Nm
ME Engine control system - Fuel System (July 2009)
© MAN Diesel
2009/07/01
< 17 >
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