Why Does Water Come Out of the Exhaust Pipe in Winter?

[Quinn]

In winter, water comes out of the exhaust pipe because the three-way catalytic converter releases water vapor during operation. As the temperature of the exhaust pipe decreases, water droplets form and flow out with the exhaust gas from the exhaust port. Below is a detailed introduction to the three-way catalytic converter in cars: Water Discharge Phenomenon: When the car is idling or running at high speed, water often drips or flows from the exhaust port at the rear of the exhaust pipe or the drainage hole under the muffler. This indicates that the engine is burning well and the three-way catalytic converter is functioning properly. Working Principle: The working principle is that after the car's exhaust gas passes through the three-way catalytic converter, harmful gases such as carbon monoxide in the exhaust are converted into carbon dioxide and water through chemical reactions in the three-way catalytic converter.