Mazda RX-8 2004 - Eccentric Shaft Position Sensor Construction;Operation; Eccentric Shaft Position Sensor Function

CONTROL SYSTEM
01–40–53
01–40
KS Characteristic (When 1G applied)
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ECCENTRIC SHAFT POSITION SENSOR FUNCTION
CHU014018221S01
• Detects the rotation pulse of the eccentric shaft position plate as an eccentric shaft angle signal.
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ECCENTRIC SHAFT POSITION SENSOR CONSTRUCTION/OPERATION
CHU014018221S02
• Installed on the front housing.
• The sensor pulse wheel has 30 teeth and 3 areas
with no teeth.
• The angle between two notches is 10°, and the
angle between two notches where there are no
teeth is 30°.
• Sends the change in the amount of magnetic flux
density detected at the magnet pickup coil in the
eccentric shaft position sensor to the PCM as a
voltage value.
• When the eccentric shaft position sensor is
removed, installed, or replaced, magnetic flux of
the magnet pickup coil will be disturbed, if
magnetic material such as iron powder adheres to
the sensor, resulting in abnormal sensor output, which may adversely affect the engine control.
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VOLTAGE (mV)
26
8
0
LOW
HIGH
FREQUENCY
±
CHU0140S089
ECCENTRIC SHAFT
POSITION SENSOR
CHU0140S069
PCM
BTDC 5°
BTDC 5°
30°
30°
BTDC 5°
(FRONT)
30°
10°
BTDC 5°
(REAR)
CPU
CPU
EXHAUST
EXHAUST
EXHAUST
INTAKE
INTAKE
INTAKE
COMPRESSION
COMPRESSION
COMPRESSION
ECCENTRIC SHAFT
POSITION PLATE
ECCENTRIC SHAFT
POSITION SENSOR
ECCENTRIC SHAFT POSITION SENSOR
FRONT
ROTOR
REAR
ROTOR
COMBUSTION
COMBUSTION
COMBUSTION
CHU0140S070