Secondary Shutter Valve - Mazda RX-8 2009 Service Highlights

High-speed range
When the engine speed reaches the high range,
the VDI valve opens, and the actual length of the
intake air in the pipe is shortened to efficiently
provide dynamic air charging effect.
When the intake ports are shut abruptly, the
intake air does not stop due to the inertia effect
and it becomes compressed and highly
pressurized. This pressurized air becomes a
reflected high-pressure wave that pressurizes the
intake air in the rotor chambers. This is dynamic
air charging pressurization. The intake air amount
is increased by the dynamic air charging effect,
improving torque at the high-speed range.
End Of Sie
SOKYU_NG: SOLENOID VALVE
SECONDARY SHUTTER VALVE (SSV) SOLENOID VALVE CONSTRUCTION/OPERATION [13B-MSP]
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, intake manifold vacuum 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, BARO is
applied to the actuator.
End Of Sie
SOKYU_NG: VARIABLE FRESH AIR DUCT SOLENOID VALVE
2009 Mazda RX-8 Service Highlights (3452–1U–08C)
INTAKE-AIR SYSTEM [13B-MSP]
VDI ACTUATOR
: INTAKE AIR
: EXHAUST GAS
HIGH-PRESSURE
WAVE
B
A
01-13
VDI VALVE
ar8uun00000109
VDI VALVE
ar8uun00000110
id0113z3662400
C
ar8uun00000093
01-13–9