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Development of a Pre-Alarm Diagnostic System for a Diesel Emission Analyzer
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Abstract
Gaseous emission measurements of a diesel engine including hydrocarbons (HC), carbon monoxide (CO), and oxide of nitrogen (NOx) are made in accordance with the procedures specified in the Federal Register. However, it is very difficult to maintain constantly the accuracy of these emission measurements due to failure of the emission analyzer. The authors have thus developed the Pre-Alarm Diagnostic System for a Diesel Emission Analyzer.
Firstly, the authors have carried out analysis of all failure modes that are classified into initial failure, random failure and wearing-out failure, plus tolerance level for prediction of failures and method of predicting failures.
Next, the authors have developed the Pre-Alarm Diagnostic System that is able to easily discover these failures before the exhaust emission test. In this system, 40 sensors, such as pressure, temperature, voltage etc, are laid in each pipe line of connection between exhaust emission sampling pump and analyzer. The signals of these sensors are analysed and various failures are predicted by computer.
This paper describes the points to which very careful consideration was given during the development of the Pre-Alarm Diagnostic System.
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Citation
Ichikawa, J., Suzuki, T., and Kugo, T., "Development of a Pre-Alarm Diagnostic System for a Diesel Emission Analyzer," SAE Technical Paper 890186, 1989, https://doi.org/10.4271/890186.Also In
References
- Japan - Environment Agency Diesel heavy duty engines exhaust emission regulation, Notice as of May 20, 1974
- Continuous Hydrocarbons Analysis of Diesel Emission - SAE J215 SAE Recommended Practice
- Measurement of Carbon Dioxide, Carbon Monoxide, and Oxides of Nitrogen in Diesel Exhaust SAE J215
- Measuring method for Total Hydrocarbons in Diesel Exhaust Emission by Hydrogen Flame Ionization Analyzer JASE 007-82
- Analytical Procedure for Continuous Measurement of Carbon Monoxide, Carbon Dioxide and Hydrocarbons in Automobile Exhaust Gas JIS D3030
- Japanese Patent No, 6430 - 2G