Perkins 854E-E34TA Systems Operation Testing And Adjusting page 36

36
Engine Operation
Speed/Timing Sensors
Illustration 32
Typical example
The crankshaft speed/timing sensor generates a
signal by detecting the movement of the teeth that are
located on the crankshaft timing ring (1). The signal
that is generated by the speed/timing sensor is
transmitted to the ECM. The ECM uses the signal
from the speed/timing sensor to calculate the position
of the crankshaft. The signal is also used to
determine the engine speed.
Illustration 33
Typical example
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The camshaft speed/timing sensor generates a signal
that is related to the camshaft position. The camshaft
speed/timing sensor detects the movement of the
position wheel on the front of the camshaft (2). The
signal that is generated by the speed/timing sensor is
transmitted to the ECM. The ECM calculates the
speed and the rotational position of the engine by
using the signal.
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