Secondary air injection (commonly known as air injection) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream to allow for a fuller …

5 days ago · The Air Injection Reaction (AIR) system, often called the secondary air injection system, is a specialized component of a vehicle’s broader emissions control strategy. Its …

Sep 8, 2025 · So, the air injection system (AIS), helps engines reduce hydrocarbon emissions, while meeting emission control standards.

Air Injection System & Smog Pump The air injection system (AIS) is designed to introduce clean air to the engine exhaust as it exits the exhaust manifold or exhaust headers. Exhaust gases …

On this page, you can find out precisely how this works. Here you can also read how malfunctions in the secondary air system become noticeable and how they can be precisely located during …

Jun 21, 2025 · The air injection pump, also known as a smog pump or Secondary Air Injection (SAI) system, is a crucial component in reducing harmful emissions from gasoline and diesel …

Dec 7, 2023 · Learn about the function, signs of failure, causes of failure, diagnosing, replacing, maintenance, bypass kits, and laws related to secondary air injection pump.

Learn how the Secondary Air Injection System reduces exhaust emissions by injecting fresh air into your vehicle's exhaust system. See its key components now.

Why is air only injected during cold starts and what influence does this have on pollutants? Read on for information about which components are fitted in the secondary air system and why.

Air injection was first used as an emissions control technique in itself. It is still used for this purpose in heavy-duty gasoline engines and four-stroke motorcycles (both engine types …