Here's how it works:
* Exhaust gases are diverted: A small amount of exhaust gas is drawn from the exhaust manifold.
* Mixed with intake air: This exhaust gas is then mixed with the fresh air going into the cylinders.
* Lower combustion temperature: Because the exhaust gas is already partially burned and contains less oxygen, the combustion temperature in the cylinders is reduced.
* Reduced NOx formation: Lower combustion temperatures significantly reduce the formation of NOx, a major air pollutant.
Essentially, the EGR valve acts as a controlled valve, regulating how much exhaust gas is recirculated based on engine load and temperature. A malfunctioning EGR valve can lead to rough idling, poor fuel economy, and potentially engine damage.
