Emission System Upgrades for Older Vehicles

Paper #:
  • 960062

Published:
  • 1996-02-01
Citation:
Carlson, R., Finkenbiner, K., and Sommerville, R., "Emission System Upgrades for Older Vehicles," SAE Technical Paper 960062, 1996, https://doi.org/10.4271/960062.
Pages:
11
Abstract:
Thirteen 1975-1980 model year vehicles were equipped with a set of components to upgrade their emission control systems. Each vehicle was tested before maintenance (as-received), after tune-up and correction of original equipment emission system defects (baseline), and after installation of the emission upgrade system (upgrade). Average emissions of non-methane hydrocarbons (NMHC), carbon monoxide (CO), and nitrogen oxides (NOx) with the emission upgrade system installed were reduced more than 60% from the baseline immediately after upgrade.Six of the vehicles accumulated 48,000 kilometers with the upgrade system. After 48,000 kilometers, average emissions of NMHC and NOx were still reduced approximately 50% compared to the baseline and average emissions of CO were reduced approximately 20%.
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