Air Injection System: Operation

When exhaust system pressure is less than atmospheric pressure, reed valve is opened to incoming air. When exhaust pressure exceeds atmospheric pressure, reed valve is closed to incoming air. This valve also acts as a check valve.

Air control valves are used to help control and govern the flow of air. Air control valves are regulated by engine vacuum.

Fig 1: Air Injection System (B2200)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Air Injection System (B2600)

Courtesy of MAZDA MOTORS CORP.

Fig 3: Air Injection System (626 - Non-Turbo)

Courtesy of MAZDA MOTORS CORP.

Fig 4: Air Injection System (626 - Turbo)

Courtesy of MAZDA MOTORS CORP.