Operation4002−1/A1
Winterthur Gas & Diesel Ltd.
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4. Cylinder-related Control Functions
4.1 General
Each cylinder has an FCM−20. A redundant system bus gives communication
between each FCM−20.
The last and last but one FCM−20 receive the crank angle signal from a redundant
SSI bus.
If an FCM−20 becomes defective, the related cylinder is cut out. The other FCM−20
continue to operate.
4.2 Functions
The the cylinder-related control functions are as follows:
D Volumetric injection control (with VIT)
D Exhaust valve control (with VEO/VEC)
D Starting valve control.
FCM−20
System Bus (CANopen)
2 x SSI
Exhaust Rail Valve
Position
Sensor
Injection Quantity
Rail Valve Inject
Start Air Pilot Valve
Starting
Valve
Injection Rail Valves 1 to 3
Injection
Quantity
Sensor
Rail Valve return
Rail Valve return
Exhaust Valve Position
Rail Valve Open
Rail Valve Inject
Rail Valve Close
Modulebus
(CANopen)
Rail Valve Inject
Rail Valve return
Fig. 6: Cylinder-related Control Functions
Engine Control System WECS-9520
2014
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