The Effect of EGR System Response Time on NOx Feedgas Emissions during Engine Transients Research Staff, Ford Motor Company, Dearborn, MI

Format:

Conference/Event

Author/Creator:

Throop, M. J., author.

Conference Name:

SAE International Congress & Exposition (1985-02-25 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1985

Summary:

Quantitative measurements were made of NOx feedgas emissions during transient engine operation as the response time of an EGR system was progressively-degraded. For a simple acceleration-cruise-deceleration engine speed/torque versus time trajectory, it was found that the NOx emissions were higher during acceleration and lower during deceleration than corresponding values predicted from steady-state mapping data. The magnitude of the differences, as well as the total mass of NOx integrated over the speed/torque trajectory, all increased as the EGR response time was increased. Using a simple dynamic EGR model, NOx feedgas emissions were predicted for engine operation with a production EGR system over a 128 second portion of the FTP CVS cycle. The NOx feedgas predictions were shown to be in excellent agreement with actual emission measurements

Notes:

Vendor supplied data

Publisher Number:

850133

Access Restriction:

Restricted for use by site license