CATALYST SYSTEMS DEVELOPMENT

770197

02/01/1977

Event
1977 International Automotive Engineering Congress and Exposition
Authors Abstract
Content
This paper describes the results of studies on the behavior of air-fuel ratios under feedback control, the effect of air-fuel ratio modulation on three-way catalyst conversion efficiency and emission test results with and without feed back control. As a further measure for decreasing automobile exhaust emissions, the three-way catalyst activity for reduction of CO, HC and NOx emissions is most effectively utilized when the normal engine air-fuel ratio perturbations are controlled and limited. In order to attain such an objective, this report describes the governing characteristics of an air-fuel ratio control system using an EFl engine coupled to a ZrO2 type O2 sensor and feed back loop. The conversion efficiency characteristics of a conventional three-way catalyst, using systematically modulated air-fuel ratios, and the resultant reduction of exhaust emissions with these systematic fluctuations and limited perturbations are also defined.
Meta TagsDetails
DOI
https://doi.org/10.4271/770197
Pages
24
Citation
Kaneko, Y., Kobayashi, H., Komagome, R., Nakagami, T. et al., "CATALYST SYSTEMS DEVELOPMENT," SAE Technical Paper 770197, 1977, https://doi.org/10.4271/770197.
Additional Details
Publisher
Published
Feb 1, 1977
Product Code
770197
Content Type
Technical Paper
Language
English