Variable Fresh Air Duct (Vfad) Solenoid Valve Function [13B-Msp]; Variable Fresh Air Duct; Variable Fresh Air Duct (Vfad) Actuator Function [13B-Msp]; Vfad Actuator - Mazda RX-8 2009 Service Highlights

VARIABLE FRESH AIR DUCT (VFAD) SOLENOID VALVE FUNCTION [13B-MSP]

With VFAD
Switches pressure (intake manifold vacuum or BARO) applied to the VFAD actuator according to a signal from
the PCM.
End Of Sie
VARIABLE FRESH AIR DUCT (VFAD) SOLENOID VALVE CONSTRUCTION/OPERATION [13B-MSP]
With VFAD
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.
End Of Sie
SOKYU_NG: VARIABLE FRESH AIR DUCT ACTUATOR

VARIABLE FRESH AIR DUCT (VFAD) ACTUATOR FUNCTION [13B-MSP]

With VFAD
Opens and closes the VFAD valve.
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VARIABLE FRESH AIR DUCT (VFAD) ACTUATOR CONSTRUCTION/OPERATION [13B-MSP]
With VFAD
A diaphragm design has been adopted.
Normally, the rod is pushed by the force of the
spring, opening the VFAD valve. When intake
manifold vacuum is applied to the diaphragm
chamber, the rod is pulled, closing the VFAD
valve.
End Of Sie
SOKYU_NG: AUXILIARY PORT VALVE MOTOR

AUXILIARY PORT VALVE (APV) MOTOR FUNCTION [13B-MSP]

Drives the APV motor to open or close the APV according to a signal from the PCM.
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AUXILIARY PORT VALVE (APV) MOTOR CONSTRUCTION/OPERATION [13B-MSP]
The position sensor is built into the APV motor.
The motor is driven according to an operation
signal from the PCM.
The motor driving force is transmitted to the drive
gear, counter gear, shaft, and arm, thereby
opening or closing the APV.
End Of Sie
01-13–10
2009 Mazda RX-8 Service Highlights (3452–1U–08C)
INTAKE-AIR SYSTEM [13B-MSP]
A
RETURN
(OPEN)
DRIVE GEAR
APV MOTOR
COUNTER GEAR
Revised 11/2008 (Ref. No. R321/08)
id0113z3662500
id0113z3662600
B
C
ar8uun00000094
id0113z3663300
id0113z3663400
VFAD VALVE
PULL
(CLOSE)
VFAD
ACTUATOR
ar8uun00000096
id0113z3663100
id0113z3663200
SHAFT
ARM
APV
OPEN
CLOSE
ar8uun00000095