SECONDARY AIR INJECTION (AIR) CONTROL VALVE CONSTRUCTION/OPERATION


BHE011613990T02

1
From AIR pump
2
To exhaust port
3
Actuator
4
Diaphragm
5
Spring
6
Valve
7
Reed valve
8
Secondary air flow

• 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.

• When the AIR solenoid valve is turned off, atmospheric air forms in the actuator and the valve is closed by spring force, thereby blocking the path.

• The reed valve provided in the AIR control valve prevents reverse flow of exhaust gas and protects the AIR pump.