Which is more efficient IEGR or exhaust gas recirculation?
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.
How does exhaust gas recirculation affect engine wear?
There are several studies regarding the impact of the EGR system on engine wear and oil degradation. In the study [5], the investigation of EGR and wear was conducted on a test engine operating at 2400 rpm with a particular oil specification and combustion system.
How is exhaust gas recirculated in the intake manifold?
The exhaust gas recirculation in the intake manifold is not continuous during engine operation. The electronic control unit (ECU) controls the EGR valve (4) to allow the exhaust gas to enter the intake manifold.
Why are EGT’s important in a diesel engine?
This entry was posted on March 10, 2013 by Speed House. A powerful engine will create heat; there is just no way around it. In the diesel performance world, we measure the heat created by combustion in the form of exhaust gas temperature, or EGT for short. Why are your EGT’s important?
How does the EGR system cool the engine?
Short version: The EGR system is water cooled – it’s capturing hot, highly energetic exhaust gas from between the manifold, and sending it back to the inlet side of the engine, and that heat is a gross disadvantage to engine operation.
What causes a rough idle on an EGR valve?
A rough idle may be caused by a faulty ignition coil, a vacuum leak, or an ignition system problem. So before spending money and replacing parts, troubleshoot the EGR valve and other system components to try to narrow down the problem.
What does EGR stand for in diesel engine?
EGR stands for the ‘exhaust gas recirculation’, a system that pumps exhaust back into the inlet of your engine, at times, in measured doses. Diesels do this more enthusiastically than petrols, but they both do it.
Where are the EGR Jets in the intake manifold?
A more radical design, implemented in a few models, was the replacement of the valve with EGR jets at the bottom of the intake manifold. Some newer high-efficiency engines, for example those with variable valve timing (VVT), don’t even use an EGR system. If playback doesn’t begin shortly, try restarting your device.
