Mazda RX-8 2004 - Secondary Air Injection (Air) Control Valve Construction;Operation; Secondary Air Injection (Air) Control Valve Function

EMISSION SYSTEM
01–16–4
System Diagram
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SECONDARY AIR INJECTION (AIR) CONTROL VALVE FUNCTION
CHU011613990S01
• Opens/closes the path of air sent from the AIR pump to the exhaust ports.
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SECONDARY AIR INJECTION (AIR) CONTROL VALVE CONSTRUCTION/OPERATION
CHU011613990S02
• Mainly consists of an actuator and reed valve.
• When the AIR solenoid valve is turned on, negative pressure is applied to the actuator diaphragm, opening the
inner valve and sending the air from the AIR pump to the exhaust ports.
AIR SOLENOID VALVE
AIR CONTROL VALVE
AIR PORT
AIR PUMP
EXHAUST
PORT
A
A
EXHAUST
PORT
TWC
VACUUM
CHAMBER
AIR PORT
CHU0116S004
ACTUATOR
DIAPHRAGM
FROM SECONDARY
AIR INJECTION
PUMP
TO EXHAUST PORT
REED VALVE
VALVE
SPRING
: SECONDARY AIR FLOW
CHU0116S005