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"Combined EGR System," a Development of New Technology for NOx Reduction
Published May 19, 2004 by Society of Automotive Engineers of Japan in Japan
Event: 2004 JSAE Annual Congress
New short-term emissions standards have required the reduction of NOx. This combined EGR system has been found to be an effective means of accomplishing this reduction. A combined EGR system consisting of an external EGR system with a highly efficient EGR cooler and an internal EGR system with an electronically controlled variable valve actuation mechanism has been newly developed to reduce NOx emissions for all operating conditions, without the need for increased radiator capacity or modification of the cooling system on the vehicle.