Operation
4628−1/A1
Winterthur Gas & Diesel Ltd.
1/ 2
Pick-up for Speed Measurement
1. General
To measure the engine speed (rpm), six proximity sensors are installed in a speed
pick-up unit, attached to the support of the fuel pump unit.
For safety, there are three electrically isolated proximity sensor groups as follows:
D Speed identification in the remote control system (RCS)
D Overspeed safety system
D Speed control system.
2. Function
The proximity sensors (5, 6, 7, 9, 10 and 11 Fig. 1) measure the speed of the
flywheel (1). When the flywheel turns, the proximity sensors sense the movement of
the teeth. Signals are sent through the engine control system (ECS) to the RCS to
monitor the load and speed-related functions. Data are also sent to the speed
indication instruments.
Note: The top view
I shows the proximity sensors with the cover 4 removed.
2014
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