Off-Cycle Exhaust Emissions from Modern Passenger Cars with Properly-Functioning Emissions Controls

960064

02/01/1996

Event
International Congress & Exposition
Authors Abstract
Content
Real-world tailpipe emissions from properly-functioning, model year 1991-94 conventional gasoline-fueled cars associated with vehicle operations not emphasized in the FTP are analyzed. Tailpipe emissions are expressed as the product of three factors: fuel rate, engine-out emissions index, and catalyst pass fraction, which are modeled using empirical data from the FTP-Revision Project and applied to in-use driving survey data to estimate real-world emissions. Average tailpipe emissions due to fuel enrichment in warmed-up vehicles are estimated to be 8 g/mile for CO, and 0.3 g/mile for HC. For NOx, the contribution due to incremental loads on the engine (i.e. air conditioner, grade, high acceleration, and high speed) that are not accounted for in the FTP but are encountered in real-world driving are estimated to be roughly 0.3 g/mile.
Meta TagsDetails
DOI
https://doi.org/10.4271/960064
Pages
14
Citation
Goodwin, R., and Ross, M., "Off-Cycle Exhaust Emissions from Modern Passenger Cars with Properly-Functioning Emissions Controls," SAE Technical Paper 960064, 1996, https://doi.org/10.4271/960064.
Additional Details
Publisher
Published
Feb 1, 1996
Product Code
960064
Content Type
Technical Paper
Language
English