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MAN B&W 5.18
Alphatronic 2000 Propulsion Control System
MAN Diesel’s Alphatronic 2000 Propulsion Control
System (PCS) <strong>is</strong> designed for control of propulsion
plants based on diesel engines with CP propellers.
The plant could for instance include tunnel
gear with PTO/PTI, PTO gear, multiple engines on
one gearbox as well as multiple propeller plants.
As shown in Fig. 5.18.07, the propulsion control
system compr<strong>is</strong>es a computer controlled system
with interconnections between control stations via
a redundant bus and a hard wired back�up control
system for direct pitch control at constant shaft
speed.
The computer controlled system contains functions
for:
• Machinery control of engine start/stop, engine
load limits and possible gear clutches.
Bridge
RPM Pitch
Operator
Panel (*)
Ship’s
Alarm
System
Bridge Wing
Engine Control Room
Engine Room
STOP
START
Local engine
control
Engine
safety
system
MAN B&W S70MC, S70MC-C/ME-C/ME-GI, L70MC-C/ME-C,
S60MC, S60MC-C/ME-C/ME-GI/ME-B, L60MC-C/ME-C,
S50MC, S50MC-C/ME-C/ME-B, S46MC-C/ME-B, S42MC,
S40MC-C/ME-B, S35MC, S35MC-C/ME-B, L35MC, S26MC
STOP
P I
Terminals for
engine monitoring
sensors
(In governor)
Main Control Station
(Center)
Bridge Wing
RPM Pitch RPM Pitch
Operator
ES: Emergency Stop Operator
ES Panel
BU ES
BU: BackUp Control Panel (*) ES
STOP
P I
Governor
OVER
LOAD
Handles
interface
Terminals for
propeller
monitoring
sensors
Duplicated Network
System failure alarm, Load reduction, Load red. Cancel alarm
Start/Stop/Slow turning, Start blocking, Remote/Local
Governor limiter cancel
Speed Set
Fuel Index
Charge Air Press.
Engine overload (max. load)
Pitch Set
Propeller Pitch
Remote/Local
Operator Closed Loop Backup selected
Panel Control Box
(OP�P)
Engine speed
Pitch
Ahead/
Shut down, Shut down reset/cancel
Astern
I
P I
Fig. 5.18.07: MAN Diesel’s Alphatronic 2000 Propulsion Control System
Pitch
MAN Diesel
RPM Pitch
Operator
Panel
Propulsion
Control
System
Page 6 of 8
• Thrust control with optimization of propeller
pitch and shaft speed. Selection of combinator,
constant speed or separate thrust mode <strong>is</strong>
possible. The rates of changes are controlled to
ensure smooth manoeuvres and avoidance of
propeller cavitation.
• A Load control function protects the engine
against overload. The load control function contains
a scavenge air smoke limiter, a load programme
for avoidance of high thermal stresses
in the engine, an automatic load reduction and
an engineer controlled limitation of maximum
load.
• Functions for transfer of responsibility between
the local control stand, engine control
room and control locations on the bridge are
incorporated in the system.
Shaft Generator
/ PMS
Auxiliary Control
Equipment
Coordinated
Control
System
178 22 40�6.1
198 53 22�1.2