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What is the working principle of a secondary air pump?

1Answers
LeMatthew
07/25/2025, 05:26:54 AM

The working principle of a secondary air pump is: 1. When the engine is running, the air pump is driven by the crankshaft belt, pumping a large volume of low-pressure air flow through a hose into the diverter valve; 2. Under normal circumstances, the diverter valve opens, allowing the air flow to pass through the diverter valve and check valve into the air injection manifold. The functions of the secondary air pump are: 1. To draw fresh air into the air pump and then pump it into the exhaust system; 2. The fresh air entering the exhaust system accelerates the catalytic reaction of the three-way catalytic converter, converting carbon monoxide and hydrocarbons in the exhaust gas into carbon dioxide and water, thereby reducing pollution.

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