Air Injection System

The purpose of the air injection system, is to reduce exhaust emissions by oxidizing hydrocarbons (HC) and carbon monoxide (CO). System is composed of a one-way air suction valve (pulse air valve), air cleaner, various hoses and tubing.

Negative pressure from exhaust pulsation reaches suction valve through a suction pipe. This causes reeds in suction valve to draw open. Secondary (fresh) air from air cleaner is drawn into exhaust passages. When positive pressure is present in exhaust, reeds are closed to prevent reverse flow of exhaust gas.