Celebrity L4-151 2.5L (1982)
Air Diverter Valve: Description and Operation
Fig. 7 - Diverter Or Air Bypass Valve W/O Pressure Relief Valve
Fig. 8 - Diverter Or Air Bypass Valve W/ Pressure Relief Valve
Fig. 4 - Air Pump W/ Centrifugal Filter & Pressure Relief Valve
The diverter or air bypass valve--Figs 7 & 8--when triggered by a sharp increase in manifold vacuum, shuts off the injected air to the exhaust
preventing backfiring during this richer period.
On engine overrun the total air supply is dumped through the diverter valve muffler.
At high engine speeds the excess air is dumped through the pressure relief valve located either in the pump assembly--Fig 4--or the diverter
valve--Fig 8.