MCBG Drivers Presentation.ppt
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Transcript of MCBG Drivers Presentation.ppt
8/14/2019 MCBG Drivers Presentation.ppt
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MICRO CONTROLLER BASED GOVERNOR (MCBG)
TYPE MEG 601
Medha Servo Drives (P) LtdHyderabad.
Andhra Pradesh, India.
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Working Principle of Governor
Engine
RPM
Governor
Notchposition
The Governor should
maintain constant
Engine RPM as per
Notch signal
irrespective of load.
So Engine RPM signal
is taken to Governor for
reference.
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Working Principle of Governor
Fuel Rack
GovernorEngine
RPM
Notchposition
To maintain constant
engine RPM, Governor
adjusts the fuel rack
position.
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Working Principle of Governor
Fuel Rack
GovernorEngine
RPM
Notchposition
Boost AirPressure
The amount of rack that
can be advanced is
limited by the BAP. So
BAP signal is also
connected to Goveror.
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Working Principle of Governor
Lube oilPressure
Fuel Rack
GovernorEngine
RPM
Notchposition
Boost AirPressure
Governor has to shut
down the engine if
sufficient lube oil
pressure is not available
at that notch. So lube oil pressure signal is also
connected to Governor.
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Working Principle of Governor
E type excitationinterfacing
Lube oilPressure
Fuel Rack
GovernorEngine
RPM
Notchposition
Boost AirPressure
When ever engine is
overloaded Governor
generates an output
signal proportional to
the amount ofoverloading to
maintain constant
Engine RPM. This
signal is interfaced
with excitation system
to reduce the load.
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CONTROL UNIT
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ACTUATOR UNIT
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Installation of Control Unit inDriver’s CAB SH side in a
WDM series Locomotive
MICROCONTROLLER BASED
GOVERNOR (MCBG) INSTALLATION
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Installation of Actuator Unit on
a Woodward Governor base
in a WDM series Locomotive
MICROCONTROLLER BASED
GOVERNOR (MCBG) INSTALLATION
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Advanced Features
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Advantages over conventionalgovernors
No need to check oil level sincethe governor is fully solid state.
Cranking time is less ascompared to Woodwardgovernor because the rack is
advanced before cranking. Battery life is increased.
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Display Parameters
Displays variousDiesel Engineparameters like Engine RPM
Notch
Load ControlPosition (LCP)
Fuel Rack Position
Booster AirPressure
Lube Oil Pressure
Fuel Oil Pressure
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Fault Diagnosis
On line FaultDisplayMessages with
Hooter Sounding Error Log with
Real Time andDate stamp in
Non VolatileMemory andDown Loadingthru LAPTOP/PC
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Test Facilities
Facility to testelectronic andmechanical OST
through key lockswitch
Dry run test
Notch wisediesel enginerun time counter
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Faults can be cleared by Driver
Faults Driver AttentionLoco cranking
but notstarting/firing.
1. MCBG is not powered ON.
2. MU switch in STOP position.
3. 'Press Start Button to CrankEngine' message is not on MCBG
screen.4. 'Lube oil sensor faulty, waiting for
recovery' message is on MCBGscreen.
5. LWS is operated.
6. OSTA tripped and not reset
properly.
7. Fuel Racks do not travel even ifGovernor shaft moves. (Overtravel spring in the base is windup)
8. If Fuel racks is not moving presslinkage to crank the engine.
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Faults can be cleared by Driver
Faults Driver Attention
BAP less and poor haulingpower.
Switch on the Boost aircontrol switch in BAP Bypassmode provided on the frontpanel of the control unit.
Erratic engine rpm. Check the Notch inputconnections at Governorterminal block.
Check the connectortightness.
BAP/LOP/FOP/FRP sensorfaulty message on MCBGDisplay.
Check the connectorstightness at MCBG Controlunit & Actuator unit.
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DRIVERS INSTRUCTION
When Engine got shutting down due to any reason:
Note down the fault message and record inrepair book.
Press acknowledge push button available on
front panel of control unit to clear the faultmessages.
Ensure the following message appears onDisplay before pressing start button.
“Press Start Button to Crank Engine”
0r “Engine Shut Down. Press, START Button to Crank
Engine”
Then crank the Loco.
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DRIVERS INSTRUCTION
In case of LOP sensor faulty loco willnot crank.
BAP,FOP & FRP sensor failure locowill crank normally.
A message will be display aftermechanical OSTA trip “Move fuel racklinkage manually to free them.
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