5
CF65/75/85 series
Description of components
COMPONENTS
2-1
2. DESCRIPTION OF COMPONENTS
2.1 INDUCTIVE SENSOR
The vehicle has a number of inductive sensors,
such as:
-
wheel speed sensor
-
engine speed sensor
-
camshaft sensor
Recording engine speed
The engine speed is recorded via the crankshaft
position sensor. The crankshaft position sensor
output signal is a sine wave signal with a
frequency corresponding to the number of holes
in the pulse disc and the crankshaft rotation
frequency.
The signal is converted in the electronic unit into
a message that is sent via the CAN network.
The VIC sends this message to the DIP, which
then activates the rev counter.
Engine speed sensor operating principles
The inductive sensor consists of a permanent
magnet (1), a core (2) and a coil (3).
When the inductive sensor is situated between
two teeth, the lines of force of the magnetic field
will run directly from the north pole to the south
pole via the housing.
The moment a tooth approaches the inductive
sensor, the lines of force of the magnetic field
will run from the north pole to the south pole via
the housing, the teeth of the toothed wheel and
the core.
As more lines of force are now running through
the core, a more powerful magnetic field is
obtained.
As a result of this change in the magnetic field,
an AC voltage is generated in the coil.
The value of the AC voltage generated depends
on the speed of +rotation of the toothed wheel
and the air gap between sensor (core) and
tooth.
i400442
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