Car EGR cooler role and function is key to understanding how modern engines reduce harmful emissions. This component cools exhaust gases before reintroducing them into the combustion chamber, cutting down nitrogen oxide (NOx) formation.
The Role of the EGR Cooler
The EGR cooler acts as a small heat exchanger. Its main purposes are:
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Lowering exhaust gas temperature.
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Reducing NOx emissions.
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Protecting the engine from overheating.
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Improving combustion stability.
How It Works
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Exhaust gases pass through the cooler’s channels.
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Coolant from the engine circulates around these channels.
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Heat is transferred from the hot gases to the coolant, lowering gas temperature before re-entry.
Common Issues
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Leaks: coolant entering the exhaust system → white smoke, coolant loss.
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Blockages: soot deposits limiting efficiency.
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EGR valve failure: caused by excessive heat and uncooled gases.
Why It Matters
A damaged EGR cooler increases pollution, risks engine failure, and can damage the catalytic converter. Regular checks and timely replacements are crucial for eco-friendly and safe driving.
📌 Internal link: DiagnozaBAM
📖 External source: Bosch Automotive – EGR Systems
✍️ Author: Bejenaru Alexandru Ionut – [email protected]
✍️ Author: Bejenaru Alexandru Ionut – [email protected]
🔗 Internal link: https://diagnozabam.ro/sfaturi
