5.4.4
Pick-up for speed measurement
To measure the engine speed (rpm), proximity sensors are installed in a speed pick-up unit,
attached to the support near the flywheel.
For safety, there are three electrically isolated proximity sensor groups as follows:
•
Speed identification in the remote control system (RCS)
•
Overspeed safety system
•
Speed control system.
The proximity sensors measure the speed of the flywheel (003,
turns, the proximity sensors (002) sense the movement of the teeth. The engine control system
sends signals to the RCS to monitor the load and speed related functions. Data are also sent to
the speed indication instruments.
Fig 5-23
Pick-up for speed measurement (generic)
002
001
003
004
Legend
001
Cover
003
Flywheel
002
Proximity sensor
004
Crank angle mark
X72-B
AA00-4628-00AAA-043A-A
Operation Manual
Pick-up for speed measurement
Winterthur Gas & Diesel Ltd.
- 182 -
Issue 003 2021-12
