Exhaust Emissions System - Thermostatic Air Cleaners: Description

The thermostatic air cleaner/air intake control system is a thermostatic air cleaner assembly which maintains a uniform air temperature of air entering the carburetor. Temperature is maintained to approximately 95-100°F (35-38°C), regardless of outside of temperature, to permit finer tuning and balancing of the carburetor. This helps control hydrocarbon (HC) and carbon monoxide (CO) emissions and permits better fuel atomization for more complete combustion.

The thermostatic air cleaner/air intake control system consists of the air cleaner, an outside air intake hose, a hot air hose, an air control diaphragm, an air bleed valve, an air control valve door, a vacuum pressure control check valve, and a vacuum pressure control fixed orifice.