E.C.C. Description (Models with catalyzer) - A.I.V. Control (Models with E.G.R.)

The Air Induction Valve (A.I.V.) is utilized to reduce HC and CO emissions by supplying filtered air through the A.I.V. into the exhaust tube.

This valve induces secondary air into the exhaust tube by the inherent exhaust pressure pulsations. The valve is designed for one-way flow operation, and consists of a one-way lead valve and stopper.

While exhaust pressure is below atmospheric pressure, the valves are open and induce air into the exhaust tube.

While exhaust pressure is above atmospheric pressure, the valves are closed and air is not induced into the exhaust tube.