Fast Response CO2 Sensor for Automotive Exhaust Gas Analysis

1999-01-3477

10/25/1999

Event
International Fuels & Lubricants Meeting & Exposition
Authors Abstract
Content
A fast response sensor for measuring carbon dioxide concentration has been developed for laboratory research and tested on a spark ignition engine. The sensor uses the well known infra-red absorption technique with a miniaturized detection system and short capillary sampling tubes, giving a time constant of approximately 5 milliseconds; this is sufficiently fast to observe changes in CO2 levels on a cycle-by-cycle basis under normal operating conditions. The sensor is easily located in the exhaust system and operates continuously.
The sensor was tested on a standard production four cylinder spark-ignition engine to observe changes in CO2 concentration in exhaust gas under steady state and transient operating conditions. The processed sensor signal was compared to a standard air-to-fuel ratio (AFR) sensor in the exhaust stream and the results are presented here. The high frequency response CO2 measurements give new insights into both engine and catalyst transient operation.
Meta TagsDetails
DOI
https://doi.org/10.4271/1999-01-3477
Pages
11
Citation
Sutela, C., Collings, N., and Hands, T., "Fast Response CO2 Sensor for Automotive Exhaust Gas Analysis," SAE Technical Paper 1999-01-3477, 1999, https://doi.org/10.4271/1999-01-3477.
Additional Details
Publisher
Published
Oct 25, 1999
Product Code
1999-01-3477
Content Type
Technical Paper
Language
English