Automotive Exhaust Gas Recirculation System : What It Is And Why You Shouldn't Ignore It

 In an automotive engine, the exhaust gas recirculation (EGR) system serves two main purposes: to reduce emissions of oxides of nitrogen (NOx) and to provide makeup air for the engine during cold start operation. 

The EGR system does this by recirculating a portion of the engine's exhaust gases back into the intake manifold where they are mixed with the incoming air-fuel mixture. 

While the EGR system is beneficial in reducing emissions, it can also cause some problems for the engine if not properly maintained. For example, if the EGR system becomes clogged, it can restrict the flow of exhaust gases and result in increased engine temperature and decreased fuel economy. 

In extreme cases, it can even lead to engine failure. To avoid these problems, it is important to regularly check and clean your vehicle's EGR system. 

In this blog post, we will discuss how to do just that. We will also talk about some of the common symptoms of a clogged EGR system and what you can do to prevent it from happening in the first place. 

Global Exhaust Gas Recirculation System Market to Reach $6.7 Billion by 202

• In the changed post COVID-19 business landscape, the global market for Exhaust Gas Recirculation System estimated at US$5.6 Billion in the year 2022, is projected to reach a revised size of US$6.7 Billion by 2028, growing at a CAGR of 3.2% over the analysis period 2020-2028. 
• Valve, one of the segments analyzed in the report, is projected to record a 3.5% CAGR and reach US$2.8 Billion by the end of the analysis period. 
• Taking into account the ongoing post pandemic recovery, growth in the Pipe segment is readjusted to a revised 3% CAGR for the next 7-year period.

What is an EGR system?

 

• In order to cut down on emissions, automotive manufacturers began installing EGR systems in the 1970s. EGR stands for “exhaust gas recirculation” and works by recirculating a portion of an engine’s exhaust back into the cylinders.

• This cooled exhaust gas lowers the temperature of the incoming air-fuel mixture, which reduces the formation of oxides of nitrogen (NOx).
• EGR systems can be either active or passive. Active EGR systems use sensors to monitor engine conditions and open or close an EGR valve accordingly.

• Passive EGR systems don’t have any moving parts; instead, they rely on engine design and geometry to route exhaust gases back into the cylinders.

• While EGR systems are effective at reducing NOx emissions, they can also have negative consequences on engine performance and fuel economy.

• Carbon deposits can build up on intake valves and piston crowns, leading to increased oil consumption and pre-ignition events. For these reasons, many newer engines are being designed without EGR systems.

How does an EGR system work?

• An EGR system works by recirculating a portion of an engine's exhaust gas back to the intake manifold. 
• This recirculated exhaust gas displaces some of the incoming air, which reduces the amount of oxygen available for combustion. 
• This in turn lowers peak combustion temperatures, which reduces NOx emissions.
• EGR systems can be either passive or active. Passive EGR systems use a pressure-operated valve to regulate the flow of exhaust gas, while active EGR systems use a computer-controlled valve. 
• Active EGR systems are more precise and can provide better emission reduction than passive systems.

Advantages and disadvantages of EGR systems

Exhaust gas recirculation (EGR) is a system used in internal combustion engines to recirculate exhaust gases back into the engine cylinders. This process helps to reduce emissions of oxides of nitrogen (NOx).

There are both advantages and disadvantages to using an EGR system. Some of the benefits include:

1. -Reduced NOx emissions
2. -Improved fuel economy
3. -Lower engine operating temperatures
   

However, there are also some drawbacks associated with EGR systems, such as:

1. IncreasedBack pressure in the exhaust system
2. Potential for clogging or fouling of intake valves and cylinder heads
3. Robustness issues in high-temperature environments

How to clean your EGR system

The EGR system is an important part of the exhaust system in your vehicle. It helps to reduce emissions and improve fuel economy. Over time, the EGR system can become dirty and clogged with carbon deposits. This can cause the system to malfunction and cause engine performance issues.

To clean your EGR system, you will need:

• A can of carburetor cleaner
• A wire brush
• -A rag
• gloves
  

1) Start by removing the EGR valve from the engine. You will likely need a wrench or socket set to do this. Once the valve is removed, take a look inside. If you see any carbon buildup, use the wire brush to remove it. Be sure to wear gloves when doing this.
2) Use the carburetor cleaner and rag to clean the outside of the EGR valve. Be sure to get all of the nooks and crannies.
3) Reinstall the EGR valve and reconnect any hoses or wiring that may have been disconnected during removal.
4) Start the engine and check for any leaks. If everything looks good, you're done!

Conclusion

• Automotive exhaust gas recirculation (EGR) systems are an important part of many modern vehicles. By recirculating exhaust gases back into the engine, EGR systems help to reduce emissions and improve fuel efficiency. 
• If you're considering purchasing a new vehicle, be sure to ask about the EGR system and how it can benefit you.