Exhaust Emissions System - Thermostatic Air Cleaners: Description

A thermostatically-controlled air cleaner is used to regulate intake air preheating. This unit responds to ambient temperature. A thermostatic device is located in the cold air inlet duct and regulates an air door according to incoming temperature. A hot air duct from an exhaust manifold shroud provides heated air. This system allows more refined adjustments of fuel injection system, resulting in better combustion and lower emissions.