What is the main function of the Air Injection System (AIS)?

The Air Injection System (AIS) primarily serves the purpose of pumping fresh air into the exhaust stream. This process helps to enhance the combustion of unburned hydrocarbons and carbon monoxide that exit the engine. By introducing additional oxygen into the exhaust, the AIS promotes more complete combustion of these pollutants, thereby reducing the overall emissions released into the atmosphere. This function is essential for meeting environmental regulations and improving air quality.

While enhancing fuel efficiency, maintaining engine temperature, and reducing engine noise are also important aspects of vehicle performance, they are not the main functions of the AIS. The primary role focuses on controlling emissions, making it a critical component in the management of a vehicle's environmental impact.