What is the primary purpose of AIR systems in vehicles?

The primary purpose of AIR (Additional Air) systems in vehicles is to oxidize hydrocarbons in the exhaust. These systems work by introducing additional air into the exhaust stream, particularly during cold engine operation or when the engine is under certain conditions, such as when starting up. The extra oxygen provided by the AIR system facilitates the combustion of unburned fuel and hydrocarbons before they exit the exhaust system.

By promoting the oxidation of these harmful emissions, the AIR system contributes to meeting environmental standards and reducing pollution. This is particularly important as many vehicles are required to comply with stringent emissions regulations. The role of the AIR system is thus crucial in enhancing the overall efficiency of the vehicle's emissions control strategy, helping to lower the levels of harmful substances released into the atmosphere.