Mazda RX-8 2004 - Secondary Shutter Valve (Ssv) Actuator Construction;Operation; Secondary Shutter Valve (Ssv) Actuator Function; Variable Fresh Air Duct (Vfad) Actuator Function (13 B-Msp (High Power)); Variable Fresh Air Duct (Vfad) Solenoid Valve Construction;Operation (13 B-Msp (High Power))

INTAKE-AIR SYSTEM
01–13–12
SECONDARY SHUTTER VALVE (SSV) ACTUATOR FUNCTION
CHU011320130S01
• Opens and closes the SSV.
End Of Sie
SECONDARY SHUTTER VALVE (SSV) ACTUATOR CONSTRUCTION/OPERATION
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• A diaphragm design has been adopted.
• Normally, the rod is pushed by the force of the spring, closing the SSV. When intake manifold vacuum is
applied to the diaphragm chamber, the rod is pulled, opening the SSV.
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VARIABLE FRESH AIR DUCT (VFAD) SOLENOID VALVE FUNCTION (13B-MSP (HIGH POWER))
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• Switches pressure (intake manifold vacuum or BARO) applied to the VFAD actuator according to a signal from
the PCM.
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VARIABLE FRESH AIR DUCT (VFAD) SOLENOID VALVE CONSTRUCTION/OPERATION (13B-MSP (HIGH
POWER))
CHU011318740S04
• Composed of a solenoid coil, spring, plunger, and filter.
Energized
• When the solenoid coil is energized, the plunger is pulled back. Pulling the plunger back opens the
passage between ports A and B. Due to this, BARO is applied to the actuator.
De-energized
• Passage of port A is closed by the reaction force of the spring, and the passage between ports B and C is
opened. Due to this, intake manifold vacuum is applied to the actuator.
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VARIABLE FRESH AIR DUCT (VFAD) ACTUATOR FUNCTION (13B-MSP (HIGH POWER))
CHU011320130S03
• Opens and closes the VFAD valve.
End Of Sie
OPEN
CLOSE
PUSH
PULL
BAROMETRIC
PRESSURE
VACUUM
SSV ACTUATOR
SSV VALVE
(ILLUSTRATION SHOWS
13B-MSP (HIGH POWER))
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B
C
A
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