Browse Publications Technical Papers 2013-01-0533

An Investigation of Diesel EGR Cooler Fouling and Effectiveness Recovery 2013-01-0533

Diesel engine developers are continually striving to reduce harmful NOx emissions through various calibration and hardware strategies. One strategy being implemented in production Diesel engines involves utilizing cooled exhaust gas recirculation (EGR). Although there is a significant NOx reduction potential by utilizing cooled EGR, there are also several issues associated with it, such as EGR cooler fouling and a reduction in cooler effectiveness that can occur over time. The exact cause of these issues and many others related to cooler fouling are not clearly understood. One such unanswered issue or phenomenon that has been observed in both field tested and lab tested EGR coolers is that of a recovery in EGR cooler effectiveness after a shutdown or after cycling between various conditions. The purpose of the current work was to show that an effectiveness restoration or effectiveness recovery can occur in an EGR cooler that has been exposed to soot-laden exhaust gases, through changes in operating conditions, with specific emphasis on exposure to high condensation conditions. The work was conducted on a multi-cylinder diesel engine using a shell and tube EGR cooler, with independent control over temperature, flow rate, and EGR soot/HC concentrations. The effectiveness recovery demonstrated in this work was likely caused by morphological changes of the soot layer, rather than actual cleaning or removal of the soot layer.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Visualization and Analysis of Condensation in Exhaust Gas Recirculation Coolers


View Details


Characterization of EGR Cooler Response for a Range of Engine Conditions


View Details


Optical and Infrared In-Situ Measurements of EGR Cooler Fouling


View Details