Air Injection Control Valve: Description and Operation

Combination Air Bypass/Air Control Valve:

The Combination Air Control/Bypass Valve, which is located in the air supply line between the upstream/downstream air supply check valves, combines the air control and the secondary air bypass functions.

The flow of thermactor air to the exhaust system (air control portion of the valve) is controlled by the air bypass valve. When the air is not being bypassed, the air injection point is switched to either an upstream or downstream location by the air control portion of the valve switches.