6 Hydraulic Cylinder Unit 2012
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Transcript of 6 Hydraulic Cylinder Unit 2012
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Hydraulic Cylinder Unit (HCU)p
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Hydraulic Cylinder Unit (HCU)p
High pressure pipes
Hydraulic Cylinder Unit
End cover
ELFI Valve
Fuel oil pressure boosterAccumulator
C linder Lubrication
Pressure Decay Time and other t rouble
shooting issues
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HCUHCUH drau li c C l inder Un itH d rau li c C l inder Un it
HPSHPSHydraulic Power SupplyHydraulic Power Supply
BOLL filterBOLL filter
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Dual cylinderHPS
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High Pressure Pipes
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Hydraulic Cylinder Unit (HCU)p
Fuel Oil Pressure boosterFuel Oil Pressure booster
ME LubricatorME Lubricator
AccumulatorAccumulator
ELFI valveELFI valve
01/01/2012 MAN Diesel & TurboME-B Hydraulic Cylinder Unit 3333572.2006.04.12 (2200/OZS)
Distribution blockDistribution block
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Hydraulic Cylinder Unit (HCU)p
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Hydraulic Cylinder Unit (HCU)p
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Distribution Blockp
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Distribution Blockp
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Distribution Blockp
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End cover fore sidep
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End cover fore sidep
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End cover aft sidep
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Hydraulic Cylinder Unit (HCU)p
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Hydraulic Cylinder Unit (HCU)p
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Suction valveSuction valve Slide Fuel
High pressure pipeHigh pressure pipe
Fuel pumpFuel pump
va ve
Fuel pumpFuel pump
Fuel oil inlet
8 bar
Fuel oil inlet
8 bar
p ungerp unger
Hydraulic
piston
Hydraulic
piston
Membrane
accumulator
Membrane
accumulatorELFI
Proportional
valve
ELFI
Proportional
valve
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drain
drain High pressure hydraulic oil inletHigh pressure hydraulic oil inlet
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Fuel Oil Pressure Boosterp
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Fuel Oil Pressure Boosterp
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Fuel Oil Pressure Boosterp
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Fuel Oil Pressure Booster and ELFI valvep
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Engine:
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Engine:
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E i
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Engine:
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The ELFI is immediately set to Drain Position (safe position) if:
The ELFI valve feedback signal is not valid, i.e. outside 3.5 - 20.5 mA
The ELFI valve feedback signal indicates a too high (not physical possible)
speed
The ELFI valve feedback signal indicates a position not allowed outside a
window around TDC
Pressing the Re-enable button on the Engine->Chief Limiters Screen
Fuel Injection is re-enabled by either:
Invalidation and then re-validation of the input ch. 30(cyl. A) or ch. 33 (cyl. B)
on the relevant CCU
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Resetting the CCU
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TDC
Injection start
angle trig
In ection control
Injection
ELFI valve window
supervision
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Engine:
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Accumulator
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o Accumulator
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The accumulator charge pressure should be
checked within the first week of service.
Next check should be made around 4 months
later, followed by checking every 6 months.
A minor leakage from the accumulators isunavoidable, and service experience shows
that a pressure drop in the range of 2-5
bar/month is to be expected.
The charge pressure is dependent on the
accumulatortemperature. E.g.:
01/01/2012 MAN Diesel & TurboME-B Hydraulic Cylinder Unit
136 bar @ 20C, 154 bar @ 50C
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Cylinder Lubricatorp
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The ME Engine
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Inductive proximity sensor
ivin feedback si nal forC linder lub. oil
control of piston movement Lubricator
activation signal
from controller
inlet
ow sensor
Injection plunger
Spacer for
basic setting of
Stroke
adjusting
screw
Drain
oil
outlet
200 to 300 bar system oil supply
stroke
ActuatorNon-return valve
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Sealing ring
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Channel J51 on a working CCU
In case of CCU failure, where theCCU cannot be replaced
immediately, backup cylinder
follows:
Connect temporary cables from
two other CCU units, plug 51, to
the solenoid valves on the
The lubrication will be with random
timing.
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H d li P D
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Hydraulic Pressure Decayp
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Hydraulic System complete
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rpos Hydraulic System, completep
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