MAN Diesel PrimeServ Academy Exhaust Valve Design

1. MAN Diesel PrimeServ Academy Exhaust Valve Design

ME
- Exhaust
system
(July
2009)
ME Engine
Enginecontrol
controlsystem
system
– Exhaust
system
(July
2009)
© MAN Diesel
2009/07/01
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2. Exhaust Valve System

1) Exhaust valve actuator
2) Exhaust valve
3) Special running
conditions
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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3. Exhaust Valve Actuation MC versus ME

Hydraulic
push rod
Exhaust valve
Actuator
Exhaust
valve spindle
High pressure
hydraulic oil –
inlet
FIVA Valve
Accumulator
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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4. Exhaust Valve Pipe Connections

ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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5. Exhaust Valve Actuator

Top Cover
Minimesh
Actuator Housing
Actuator Pistons
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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6.

Exhaust Valve Actuator
Working Principle
Actuator
FIVA
Unpressurised hydraulic oil
Pressurised hydraulic oil
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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7. Exhaust Valve Actuation

Initial Position
Step 1
ME Engine control system - Exhaust system (July 2009)
Step 2
© MAN Diesel
2009/07/01

8.

Design Features
MC versus ME
S50MC-C
S50ME-C
Air spring size
for closing the
exhaust valve
reduced
Hydraulic damper for
fixed valve stroke
Different valve
spindle design
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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9.

Design Details
Self-adjusting damper piston
Hydraulic nut/measuring cone
Contact less sensor with
integrated electronics
Outlet lube oil
Inlet lube oil
Damper
Air inlet
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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10.

Exhaust Valve Assembly
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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11.

Exhaust Valve
Sealing Oil Control Unit
Feed back sensor
Oil inlet to damper
Drain pipes
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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12. Sealing Oil Control Unit

Sealing oil
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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13. MOP Exhaust Valve Adjustments

Adjustment of exhaust
valve closing time
Adjustment of exhaust
valve opening time
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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14.

Special running conditions, open exh-valve
Small Bore Program (50 ME)
Check pressure free at “minimess” point 455
Close
Open
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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15.

Special running conditions, open exh-valve
Small Bore Program (50 ME)
540
Connect the mini-mesh
hose between top
flange on actuator
point 540 and point 425
at the hydraulic block
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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16.

Special running conditions, open exh-valve
Small Bore Program (50 ME)
Open
Close
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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17.

Special running conditions, open exh-valve
Large Bore Program (From 60 and up)
Close
Open
Check pressure free at “minimess” point 455
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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18.

Special running conditions, open exh-valve
Large Bore Program (From 60 and up)
(From 60 and up)
Close valve 531 to
shut off oil to damper
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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19.

Special running conditions, open exh-valve
Large Bore Program (From 60 and up)
Disconnect air
supply to air spring
Check that the exh. valve spindle has
moved to open position on the
Main Operating Panel, ’Maintenance’ –
’System View I/O Test’ – CCU, Ch 34
Drain off air pressure from
air cylinder with a mandrel
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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20.

Special running conditions, open exh-valve
Large Bore Program (From 60 and up)
Remove plug screw and mount tools to
keep exhaust valve spindle open
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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21.

Special running conditions, open exh-valve
Large Bore Program (From 60 and up)
Open damper oil supply
Valve 531
Reconnect air supply
under air piston
ME Engine control system - Exhaust system (July 2009)
© MAN Diesel
2009/07/01
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