Egr port what is

The EGR valve is therefore a system that eliminates the toxic gas particles produced by the engine by reinjecting part of the exhaust gases into the inlet. When a diesel engine is idling or running at low speed 2, rpm , part of the exhaust gas is not completely burnt, resulting in the release of excess nitrogen oxide and fine particles into the atmosphere. To minimize these emissions, which are contrary to European standards, the manufacturers have installed a valve part that redirects these exhaust gases to the injection system so that they are burned a second time before being cooled.

This second combustion mechanically reduces the fine-particle content. Although effective in controlling the Nox emission rate, this system has the disadvantage of creating soot, which eventually clogs the injection system and the valve itself.

Indeed, if the clogged valve stays closed, the vehicle will run normally but will pollute more. For this reason, you should care for your EGR system regularly by taking the right steps and actions. Power loss, engine light, black smoke, etc. Indeed, EGR valve failure usually occurs as a result of short daily trips at low speed with a cold engine.

You can also completely clean your EGR valve regularly using a specific, appropriate product to be injected into the fuel tank. Reconnect the battery. Start the car and use the diagnostic tool to check for any codes and reset the check engine light. Do a test drive to ensure the engine is running and idling smoothly. FIXD Team. Previous Post Buying a Used Car? Next article Ready For a Road Trip? You may also like.

Uncategorized 1. I just replaced my egr valve yet it cracked again why is that. Can the erg valve be cleaned. Hey Laura! Yes you can clean an EGR valve!

What do you clean it with? Leave a reply Cancel reply Your email address will not be published. More in Uncategorized. Most EGR systems include the following main hardware components:. A number of other specialized components are possible in various types of systems.

Common examples include mixers using a venturi nozzle venturi mixer or venturi pump and EGR pumps, also called EGR blowers, that are driven by an electric motor or by a mechanical connection to the engine.

The EGR system is a high pressure loop HPL system where a portion of the exhaust is taken from upstream of the turbocharger. The variable geometry turbocharger, among other tasks, ensures that the pressure difference between the exhaust and intake manifolds is positive to ensure adequate EGR flow is available when required. From the cooler, the EGR flows through an EGR pipe to the other side of the engine to a venturi-type flow meter that provides a feedback signal for monitoring the EGR rate.

The EGR then passes to the intake manifold where it mixes with cooled charge air before being inducted into the engine. The heater plate heats the EGR passing through the valve to ensure that ice does not form in the mixer housing.

A number of changes occurred in this EGR system from its introduction in Early versions used a pneumatically actuated valve that was replaced with a hydraulically actuated valve and finally, the electrically actuated valve shown in Figure 1. Some versions also used pressure taps upstream and downstream of the EGR control valve to monitor the pressure differential across the valve for EGR rate feedback instead of a venturi-type flow meter.

By , the venturi flow meter was removed entirely. Engine jacket water is used as the cooling medium in the EGR cooler in this example as well. In general, EGR can be cooled with engine coolant, ambient air or a low temperature liquid. The application of EGR is not limited to heavy-duty engines, but extends to engines powering light-duty vehicles as well. Figure 3 is a schematic representation of a passenger car type EGR system from the Audi 3.