Air Injection System How It Functions

Air Injection System: How It Functions

Wondering how the secondary air injection system work? Read the article to know everything about the functions, equipment, and smog testing.

Where do I get a car air pump near me? Simple, at any parts shop or your car’s dealership store. Anyway, let’s get started.

The air injection system (AIS) is designed in such a way so that it provides clean air to the engine exhaust. Exhaust gases are at their hottest as they leave the combustion chambers. The gases evacuate the combustion chamber, the temperature level rises at the peak. Introducing oxygen to exhaust at that point can help with the burn of the fuel mixture as it travels down the exhaust system and reaches the tailpipe.

Pump Type The pump type consists of an air pump which is also known as a smog pump. The smog pump is responsible for supplying oxygen to the exhaust system through the exhaust manifold before it reaches the Catalytic Converter. Some of the components of the exhaust system are listed below.

1. The air pump 2. The diverter valve 3. The air distribution manifold 4. The air check valve

Pulse Type Pulse Air System is the second type of system which is much simpler and relies on the vacuum. The vacuum created in the exhaust stream travels down the exhaust manifold and passages. As the engine starts, the vacuum draws fresh oxygen into the air injection lines. This fresh air is then used to delay the burning in the exhaust utilizing more fuel. The system consists of a metal duct or hose approximately 1" in diameter around the air cleaner leading to a metallic air check valve, and then the exhaust manifold.

Their functions Pump Type - The spinning vanes of the air pump push the air into the diverter valve. In times of acceleration, the air is forced through the diverter valve, the check valve, the air injection manifold, and finally into the exhaust. During deceleration, the diverter valve blocks airflow and prevents a backfire that could damage the exhaust system. The diverter valve will release excess pressure to the air cleaner when needed.

Pulse Type - As gasses travel further down the exhaust, the vacuum collects fresh oxygen into the injection system. The oxygen then travels through the diverter valve, check valve and to the exhaust manifold.

Testing for smog During the inspection, your technician will be checking for the proper connection of the injection system plumbing, all hoses, lines, valves, smog pump, etc if you own injection pump air injection system. The air pump belt may also be checked for any leaks or damages.

Thus make sure all your system connections are intact.

Conclusion This is how air pump works. These are more or less the basic details you need to know regarding car air pump. One advice I can give you, don't go for used parts shopping for your air injection system. Used parts can sometimes be faulty and that can slow your car down a lot. It's always best to buy new parts.

Yes, they can still be expensive but you are getting a warranty which is a plus. Do give my advice a thought. Till we meet again, take care!