What does the EGR valve feed?
Integral to the vehicle’s engine management system, the aptly named exhaust gas recirculation valve, or EGR valve for short, recirculates finely metered quantities of exhaust gas to the engine intake system for increased engine efficiency, reduced fuel consumption and lower NOx emissions.
What does the EGR connect to?
It connects the exhaust manifold to the intake manifold and is controlled by either a vacuum or a built-in electric step motor. The function of the EGR valve is to control the flow of exhaust gas being recirculated depending on the engine load.
How does exhaust gas recirculation ( EGR ) reduce NOx emissions?
Exhaust gas recirculation (EGR) is the most common technology to reduce nitrogen oxides (NOx) emissions on diesel internal combustion engines (ICE). EGR takes exhaust gases from the exhaust manifold and reintroduces them into the intake manifold, mixing them with fresh air. By doing this, the main ingredients of NO x emissions are reduced:
What happens when you close the EGR valve?
By allowing cooled exhaust back into the intake, the combustion temperature of the engine becomes lower than the 1600°C. I should note that at idle and full throttle, the EGR valve is closed, and does not allow any exhaust into the intake.
Can a EGR system work on a diesel engine?
Although EGR systems can function on petrol engines, considerations like the lack of throttling and the often large excesses of air mean that it is a more effective, and therefore much more prevalent for diesel engines.
Which is more efficient IEGR or exhaust gas recirculation?
EGR (external) is the main technology used by vehicle manufacturers for the reduction of NOx emissions on diesel engines. It is more efficient than iEGR mainly because the exhaust gases can be cooled before reentering the cylinders, the amount of exhaust gases recirculated is higher and the flow is better controlled.
Exhaust gas recirculation (EGR) is the most common technology to reduce nitrogen oxides (NOx) emissions on diesel internal combustion engines (ICE). EGR takes exhaust gases from the exhaust manifold and reintroduces them into the intake manifold, mixing them with fresh air. By doing this, the main ingredients of NO x emissions are reduced:
What does the EGR valve do in an engine?
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine.
EGR (external) is the main technology used by vehicle manufacturers for the reduction of NOx emissions on diesel engines. It is more efficient than iEGR mainly because the exhaust gases can be cooled before reentering the cylinders, the amount of exhaust gases recirculated is higher and the flow is better controlled.
What are the pros and cons of EGR?
Cons of an EGR Valve. When the EGR valve goes bad, it must be replaced. Unlike some emissions control devices that can go bad without affecting the drivability of the car or truck, a bad EGR valve can really affect the engine’s performance or even cause it to stop running altogether.