Which of the following is the component of EGR system?
A number of considerations must be taken into account when designing EGR systems including: deposit accumulation, contaminants, engine lubricant, system packaging and more. The main components of EGR systems are EGR valves and EGR coolers.
What is the functional difference between C EGR and I EGR?
The difference between the two EGR systems is that C-EGR recirculates exhaust back into the engine’s combustion chamber to burn off emissions, while I-EGR keeps the exhaust in the engine’s cylinders from one combustion cycle to the next to reduce emissions.
What is the function of EGR?
Abstract: Exhaust gas recirculation (EGR) is an effective strategy to control NOx emissions from diesel engines. The EGR reduces NOx through lowering the oxygen concentration in the combustion chamber, as well as through heat absorption.
What do you need to know about the EGR valve?
These systems are mostly comprised of the EGR valve, a DPFE (Delta Pressure Feedback EGR) sensor, hoses, a vacuum regulator, some vacuum lines, wiring, the computer and the exhaust tube leading to the valve itself.
Why does my dpfe have a leaking EGR valve?
You now know the DPFE, EGR valve and tube and hoses are okay and we can move on to test the EVR (EGR Vacuum Regulator), part of the system. If the reading did not change, then you could suspect a leaking EGR valve, allowing uncommanded flow of exhaust gases.
Why does my engine stall when the EGR is open?
This is because the temperature is lower so fuel does not burn at the optimal temperature and as a result is less efficient. Stalling when the engine idles like a rough idle is usually caused when the EGR valve is permanently open and is constantly letting exhaust gases into the EGR system.
How does a delta pressure feedback EGR work?
These hoses go to the EGR tube and there is an orifice in that tube between the locations where the hoses branch out. The sensor uses the difference in pressure between these two hoses to determine exhaust flow through the tube (thus the term Delta Pressure Feedback EGR).
How does the Ford EGR valve system work?
For simplicity’s sake we’ll base our diagnosis on a typical Ford EGR system. Let’s get started! So what is an EGR system and how does it work? EGR stands for Exhaust Gas Recirculation, and as its name implies, this system allows exhaust gasses from your car to be re-circulated into the engine, helping to reduce emissions.
What kind of environment does an EGR system have?
EGR systems are exposed to high temperature, corrosive, and fouling environments. The exhaust gas stream may be laden with soot, unburned oil, unburned fuel, and trace metals. With sulfur present in diesel fuel, it is usual to expect sulfur dioxide and sulfuric acid in the exhaust.
When to worry about an EGR valve problem?
If the initial reading is in spec but you have a trouble code for this system then it is possible that the system is not flowing when expected (EGR valve, EGR tube, DPFE hoses or control side issue), is flowing when it shouldn’t be (EGR valve or control side issue) or you may have an intermittent concern, possibly even with the DPFE sensor.
What is exhaust gas recirculation ( EGR ) used for?
Overview Exhaust gas recirculation (EGR) is a NOx emission control technique applicable to a wide range of diesel engines from light-, medium- and heavy-duty diesel engines right up to two-stroke low-speed marine engines.