Which component is primarily responsible for managing air flow in the Air Injection System (AIS)?

The pump is the component primarily responsible for managing air flow in the Air Injection System (AIS). In the context of vehicle emissions control, the AIS is designed to introduce additional air into the exhaust stream to assist in the complete combustion of fuel, particularly during cold start conditions when the engine is not operating at optimal efficiency. The pump draws air from the atmosphere and delivers it into the exhaust system, ensuring that there is a sufficient supply of oxygen present for the chemical reactions that reduce emissions.

The throttle body, while it does regulate air flow into the engine, is not part of the AIS and thus does not manage the specific function of introducing air into the exhaust system. Similarly, the compressor and filter serve different roles; the compressor is typically involved in boosting air pressure for various applications but is not directly involved with the AIS airflow management, and the filter simply serves to clean the air entering the system but does not manage airflow itself. Thus, the pump is crucial for the operation of the Air Injection System, ensuring that excess air is injected into the exhaust flow for better emission control.