Air Diverter Valve: Description and Operation

Combination AIRB/AIRD Valve:

PURPOSE
The combination AIRB/AIRD Valve combines the Secondary Air Injection Bypass (AIRB) and Air Diverter (AIRD) functions.

OPERATION
The AIRB portion controls the flow of secondary air to the exhaust system (air control portion of the valve) or allows secondary air to be bypassed to atmosphere. When air is not being bypassed. the air control portion of the valve switches the air injection point to either upstream or downstream location. This portion of the valve is called secondary air injection diverter AIRD.

LOCATION
The valve is located in the air supply line between the AIR pump and the upstream/downstream air supply check valves.