SAE Abstract 960062
Emission System Upgrades for Older Vehicles
- Richard R. Carlson
- Car Sound Exhaust System, Inc.
- Keith Finkenbiner
- Neutronics Enterprises, Inc.
- Richard J. Sommerville
- San Diego County Air Pollution Control District
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 baseline immediately
Six of the vehicles accumulated 48,000 kilometers with the upgrade system installed.
After 48,000 kilometers, average emissions of NMHC and NOx were still reduced approximately 50% compared to baseline, and average emissions of CO were reduced approximately 20%.