Chapter VI Fuel System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
395
Fig. 6-1-29 Installing crankshaft position
sensor
The magnetic field sent by the permanent magnet is
transferred to the trigger wheel through the soft iron
core, and the strength of magnetic field is affected by
the magnetic clearance between the trigger wheel and
the sensor. When the trigger wheel gear gets close to
the sensor, the magnetic field gets stronger; when the
trigger wheel gear gets away from the sensor, the
magnetic field gets weaker. When the trigger wheel
rotates, an alternating magnetic field will be created so
that the electromagnetic coil produces a sinusoidal
sensing voltage; the amplitude of alternating voltage
increases as the rotating speed of trigger wheel
increases (i.e. mV…
＞
100V). It is required to generate
a proper signal voltage at 30 r/min. See Fig. 6-1-27.
The installation of the crankshaft position sensor: check
whether the O-ring is installed properly, and then install
the sensor to the sensor hole on the rear end of the
exhaust manifold of the cylinder body. The mounting
plane should be well fitted with the cylinder body
mounting plane without any air leakage. Tighten 1
hexagon flange face bolt (M8×30
)
as per specified
torque. See Fig. 6-1-29.
Tightening torque for fastening bolt of crankshaft
position sensor
9 N•m±3 N•m
Crankshaft
position sensor
Cylinder body
