An air pump on a car typically refers to the component that is responsible for injecting fresh air into the vehicle's exhaust system. It is often part of the emissions control system and is specifically designed to reduce harmful emissions, such as nitrogen oxides (NOx), in the vehicle's exhaust gases.
The primary purpose of an air pump is to introduce additional oxygen into the exhaust stream, which facilitates the more efficient combustion of any unburned fuel and helps reduce emissions. This process is known as "secondary air injection." The air pump is usually controlled by the vehicle's engine control unit (ECU) and activates during cold starts or under specific driving conditions when additional oxygen is needed to improve the efficiency of the catalytic converter and reduce emissions.
Air pumps can come in different designs, but they typically consist of an electric pump or a belt-driven pump that draws in outside air and injects it into the exhaust manifold or directly into the exhaust system. This extra oxygen aids in the combustion of unburned hydrocarbons, which can be harmful to the environment.
The use of air pumps is more common in older vehicles with less advanced emissions control systems. Modern cars often use more sophisticated technologies like catalytic converters with integrated air injection to achieve cleaner emissions without the need for a separate air pump.>> https://www.autostore.pk/category/tools/air-compressor/